TY - JOUR T1 - Linker-assisted immunoassay and liquid chromatography/mass spectrometry for the analysis of glyphosate. AN - 72177905; 12380816 AB - A novel, sensitive, linker-assisted enzyme-linked immunosorbent assay (L'ELISA) was compared to on-line solid-phase extraction (SPE) with high-performance liquid chromatography/mass spectrometry (HPLC/MS) for the analysis of glyphosate in surface water and groundwater samples. The L'ELISA used succinic anhydride to derivatize glyphosate, which mimics the epitotic attachment of glyphosate to horseradish peroxidase hapten. Thus, L'ELISA recognized the derivatized glyphosate more effectively (detection limit of 0.1 microg/L) and with increased sensitivity (10-100 times) over conventional ELISA and showed the potential for other applications. The precision and accuracy of L'ELISA then was compared with on-line SPE/HPLC/MS, which detected glyphosate and its degradate derivatized with 9-fluorenylmethyl chloroformate using negative-ion electrospray (detection limit 0.1 microg/ L, relative standard deviation +/- 15%). Derivatization efficiency and matrix effects were minimized by adding an isotope-labeled glyphosate (2-13C15N). The accuracy of L'EUSA gave a false positive rate of 18% between 0.1 and 1.0 microg/L and a false positive rate of only 1% above 1.0 microg/L The relative standard deviation was +/- 20%. The correlation of L'ELISA and HPLC/MS for 66 surface water and groundwater samples was 0.97 with a slope of 1.28, with many detections of glyphosate and its degradate in surface water but not in groundwater. JF - Analytical chemistry AU - Lee, E A AU - Zimmerman, L R AU - Bhullar, B S AU - Thurman, E M AD - US Geological Survey, Lawrence, Kansas 66049, USA. ealee@usgs.gov Y1 - 2002/10/01/ PY - 2002 DA - 2002 Oct 01 SP - 4937 EP - 4943 VL - 74 IS - 19 SN - 0003-2700, 0003-2700 KW - Herbicides KW - 0 KW - Indicators and Reagents KW - Water Pollutants, Chemical KW - glyphosate KW - 4632WW1X5A KW - Glycine KW - TE7660XO1C KW - Index Medicus KW - Mass Spectrometry KW - Water Pollutants, Chemical -- analysis KW - Chromatography, High Pressure Liquid KW - Immunoassay KW - Herbicides -- analysis KW - Glycine -- analysis KW - Glycine -- analogs & derivatives UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72177905?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Analytical+chemistry&rft.atitle=Linker-assisted+immunoassay+and+liquid+chromatography%2Fmass+spectrometry+for+the+analysis+of+glyphosate.&rft.au=Lee%2C+E+A%3BZimmerman%2C+L+R%3BBhullar%2C+B+S%3BThurman%2C+E+M&rft.aulast=Lee&rft.aufirst=E&rft.date=2002-10-01&rft.volume=74&rft.issue=19&rft.spage=4937&rft.isbn=&rft.btitle=&rft.title=Analytical+chemistry&rft.issn=00032700&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-05 N1 - Date created - 2002-10-16 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Blood selenium concentrations and enzyme activities related to glutathione metabolism in wild emperor geese. AN - 72161308; 12371495 AB - In 1998, we collected blood samples from 63 emperor geese (Chen canagica) on their breeding grounds on the Yukon-Kuskokwim Delta (YKD) in western Alaska, USA. We studied the relationship between selenium concentrations in whole blood and the activities of glutathione peroxidase and glutathione reductase in plasma. Experimental studies have shown that plasma activities of these enzymes are useful biomarkers of selenium-induced oxidative stress, but little information is available on their relationship to selenium in the blood of wild birds. Adult female emperor geese incubating their eggs in mid-June had a higher mean concentration of selenium in their blood and a greater activity of glutathione peroxidase in their plasma than adult geese or goslings that were sampled during the adult flight feather-molting period in late July and early August. Glutathione peroxidase activity was positively correlated with the concentration of selenium in the blood of emperor geese, and the rate of increase relative to selenium was greater in goslings than in adults. The activity of glutathione reductase was greatest in the plasma of goslings and was greater in molting adults than incubating females but was not significantly correlated with selenium in the blood of adults or goslings. Incubating female emperor geese had high selenium concentrations in their blood, accompanied by increased glutathione peroxidase activity consistent with early oxidative stress. These findings indicate that further study of the effects of selenium exposure, particularly on reproductive success, is warranted in this species. JF - Environmental toxicology and chemistry AU - Franson, J Christian AU - Hoffman, David J AU - Schmutz, Joel A AD - U.S. Geological Survey, National Wildlife Health Center, Madison, Wisconsin 53711, USA. chris_franson@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 2179 EP - 2184 VL - 21 IS - 10 SN - 0730-7268, 0730-7268 KW - Glutathione Peroxidase KW - EC 1.11.1.9 KW - Glutathione Reductase KW - EC 1.8.1.7 KW - Selenium KW - H6241UJ22B KW - Index Medicus KW - Animals KW - Oxidative Stress -- drug effects KW - Alaska KW - Male KW - Female KW - Selenium -- blood KW - Geese -- blood KW - Selenium -- toxicity KW - Reproduction -- drug effects KW - Glutathione Peroxidase -- blood KW - Environmental Exposure KW - Glutathione Reductase -- blood UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72161308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+toxicology+and+chemistry&rft.atitle=Blood+selenium+concentrations+and+enzyme+activities+related+to+glutathione+metabolism+in+wild+emperor+geese.&rft.au=Franson%2C+J+Christian%3BHoffman%2C+David+J%3BSchmutz%2C+Joel+A&rft.aulast=Franson&rft.aufirst=J&rft.date=2002-10-01&rft.volume=21&rft.issue=10&rft.spage=2179&rft.isbn=&rft.btitle=&rft.title=Environmental+toxicology+and+chemistry&rft.issn=07307268&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-03-12 N1 - Date created - 2002-10-09 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Comparative contaminant toxicity: are amphibian larvae more sensitive than fish? AN - 72098442; 12232728 JF - Bulletin of environmental contamination and toxicology AU - Bridges, C M AU - Dwyer, F J AU - Hardesty, D K AU - Whites, D W AD - United States Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, MO 65201, USA. Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 562 EP - 569 VL - 69 IS - 4 SN - 0007-4861, 0007-4861 KW - Water Pollutants, Chemical KW - 0 KW - Index Medicus KW - Sensitivity and Specificity KW - Animals KW - Reference Values KW - Larva KW - Fishes KW - Lethal Dose 50 KW - Ranidae -- growth & development KW - Water Pollutants, Chemical -- toxicity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72098442?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+environmental+contamination+and+toxicology&rft.atitle=Comparative+contaminant+toxicity%3A+are+amphibian+larvae+more+sensitive+than+fish%3F&rft.au=Bridges%2C+C+M%3BDwyer%2C+F+J%3BHardesty%2C+D+K%3BWhites%2C+D+W&rft.aulast=Bridges&rft.aufirst=C&rft.date=2002-10-01&rft.volume=69&rft.issue=4&rft.spage=562&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+environmental+contamination+and+toxicology&rft.issn=00074861&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-10-29 N1 - Date created - 2002-09-16 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - The National Biological Information Infrastructure as an E-Government Tool AN - 60635551; 200308708 AB - Coordinated by the US Geological Survey (USGS), the National Biological Information Infrastructure (NBII) is a Web-based system that provides access to data & information on the nation's biological resources. Although it was begun in 1993, predating any formal e-Government initiative, the NBII typifies the e-Government concepts outlined in the President's Management Agenda, as well as in the proposed E-Government Act of 2002. This article -- an individual case study & not a broad survey with extensive references to the literature -- explores the structure & operation of the NBII in relation to several emerging trends in e-Government: end-user focus, defined & scalable milestones, public-private partnerships, alliances with stakeholders, & interagency cooperation. 1 Appendix. Adapted from the source document. JF - Government Information Quarterly AU - Sepic, Ron AU - Kase, Kate AD - NBII Information Liaison, USGS Biological Resources Discipline Biological Informatics Office, Reston, VA ron_sepic@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 407 EP - 424 VL - 19 IS - 4 SN - 0740-624X, 0740-624X KW - e-government KW - Natural Resources KW - Information Technology KW - Information Sources KW - Public Sector Private Sector Relations KW - Government Agencies KW - Data Banks KW - Internet KW - article KW - 9181: politics and communication; politics and communication KW - 9263: public policy/administration; public administration/bureaucracy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/60635551?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awpsa&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Government+Information+Quarterly&rft.atitle=The+National+Biological+Information+Infrastructure+as+an+E-Government+Tool&rft.au=Sepic%2C+Ron%3BKase%2C+Kate&rft.aulast=Sepic&rft.aufirst=Ron&rft.date=2002-10-01&rft.volume=19&rft.issue=4&rft.spage=407&rft.isbn=&rft.btitle=&rft.title=Government+Information+Quarterly&rft.issn=0740624X&rft_id=info:doi/ LA - English DB - Worldwide Political Science Abstracts N1 - Date revised - 2007-04-01 N1 - Last updated - 2016-09-28 N1 - CODEN - GIQUEU N1 - SubjectsTermNotLitGenreText - Internet; Public Sector Private Sector Relations; Data Banks; Information Sources; Information Technology; Government Agencies; Natural Resources ER - TY - JOUR T1 - Sr isotope tracing of aquifer interactions in an area of accelerating coal-bed methane production, Powder River basin, Wyoming AN - 52055800; 2002-075314 AB - Sr isotope data on groundwater samples from coal and overlying sandstone aquifers in the eastern Powder River Basin, Wyoming, demonstrate that the Sr isotope ratio effectively identifies groundwater from different aquifers where major ion geochemistry and O and H stable isotope data fail. Groundwaters from sandstone aquifers have a uniform (super 87) Sr/ (super 86) Sr ratio of 0.7126-0.7127. Waters from coal seams vary from (super 87) Sr/ (super 86) Sr ratio = 0.7127 near the recharge area to 0.7151 farther into the basin. The distinct Sr isotope signatures of sandstone and coal aquifers may reflect different sources of Sr in these two rock types: Sr in sandstones is held primarily in carbonate cement, whereas coals contain more radiogenic Sr in organic matter. The Sr isotope ratio is useful in identifying wells that contain mixed waters, whether due to well construction or to incomplete aquifer isolation. Measurement and continued monitoring of the Sr isotope ratio in groundwaters should provide a powerful tool for characterizing the impact of the burgeoning coal-bed methane industry on the hydrology of the Powder River Basin. JF - Geology (Boulder) AU - Frost, C D AU - Pearson, B N AU - Ogle, K M AU - Heffern, E L AU - Lyman, R M Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 923 EP - 926 PB - Geological Society of America (GSA), Boulder, CO VL - 30 IS - 10 SN - 0091-7613, 0091-7613 KW - United States KW - isotopes KW - natural gas KW - sandstone KW - petroleum KW - Campbell County Wyoming KW - stable isotopes KW - environmental effects KW - ground water KW - sedimentary rocks KW - coal KW - tracers KW - geochemistry KW - Powder River basin KW - hydrology KW - alkaline earth metals KW - monitoring KW - isotope ratios KW - measurement KW - aquifers KW - Wyoming KW - Sr-87/Sr-86 KW - metals KW - coalbed methane KW - clastic rocks KW - strontium KW - 29A:Economic geology, geology of energy sources KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52055800?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geology+%28Boulder%29&rft.atitle=Sr+isotope+tracing+of+aquifer+interactions+in+an+area+of+accelerating+coal-bed+methane+production%2C+Powder+River+basin%2C+Wyoming&rft.au=Frost%2C+C+D%3BPearson%2C+B+N%3BOgle%2C+K+M%3BHeffern%2C+E+L%3BLyman%2C+R+M&rft.aulast=Frost&rft.aufirst=C&rft.date=2002-10-01&rft.volume=30&rft.issue=10&rft.spage=923&rft.isbn=&rft.btitle=&rft.title=Geology+%28Boulder%29&rft.issn=00917613&rft_id=info:doi/10.1130%2F0091-7613%282002%290302.0.CO%3B2 L2 - http://www.gsajournals.org/gsaonline/?request=get-abstract&issn=0091-7613&volume=030&issue=010&page=0923 http://www.gsajournals.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - Number of references - 21 N1 - PubXState - CO N1 - Document feature - illus. incl. 1 table, geol. sketch map N1 - Last updated - 2012-06-07 N1 - CODEN - GLGYBA N1 - SubjectsTermNotLitGenreText - alkaline earth metals; aquifers; Campbell County Wyoming; clastic rocks; coal; coalbed methane; environmental effects; geochemistry; ground water; hydrology; isotope ratios; isotopes; measurement; metals; monitoring; natural gas; petroleum; Powder River basin; sandstone; sedimentary rocks; Sr-87/Sr-86; stable isotopes; strontium; tracers; United States; Wyoming DO - http://dx.doi.org/10.1130/0091-7613(2002)030<0923:SITOAI>2.0.CO;2 ER - TY - JOUR T1 - Innoko earth cover classification AN - 52007642; 2003-025691 JF - BLM - Alaska Technical Report AU - Payne, John AU - Merrit, Ed AU - Macleod, Robb AU - Sterrenberg, Beate Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 80 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - thematic mapper KW - land cover KW - imagery KW - Global Positioning System KW - data processing KW - mapping KW - vegetation KW - Innoko National Wildlife Refuge KW - relief KW - geographic information systems KW - data bases KW - ecology KW - hydrology KW - cartography KW - satellite methods KW - biota KW - Southern Alaska KW - habitat KW - classification KW - aerial photography KW - information systems KW - Alaska KW - landscapes KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007642?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BMerrit%2C+Ed%3BMacleod%2C+Robb%3BSterrenberg%2C+Beate&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-10-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Innoko+earth+cover+classification&rft.title=Innoko+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 15 N1 - PubXState - AK N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - aerial photography; Alaska; biota; cartography; classification; data bases; data processing; ecology; field studies; geographic information systems; Global Positioning System; habitat; hydrology; imagery; information systems; Innoko National Wildlife Refuge; land cover; landscapes; mapping; relief; remote sensing; satellite methods; Southern Alaska; thematic mapper; United States; vegetation ER - TY - JOUR T1 - Methods of documenting variability in lithostratigraphic features, fractures, and properties in the Topopah Spring Tuff at Yucca Mountain, Nevada AN - 52002593; 2003-029165 AB - Geologic field and laboratory methods are used to obtain geotechnical information about the volcanic host rocks for a potential nuclear-waste repository at Yucca Mountain, Nevada. Hydrogeologic, thermal, and mechanical properties of the 12.8-m.y.-old Topopah Spring Tuff are constrained within the lithostratigraphy defined by detailed geologic mapping. Current studies emphasize the upper lithophysal (UL), middle nonlithophysal (MN), lower lithophysal (LL), and lower nonlithophysal (LN) zones that would host the potential repository. Data are collected from surface exposures, tunnels, and surface- and tunnel-based boreholes. Lithostratigraphic contacts, fractures with trace lengths >1 m, and faults are shown on full-periphery, 1:125-scale maps. Detailed line surveys (DLS) of fractures with trace lengths >1 m (locally >30 cm) were conducted underground and in the MN on surface exposures. Fractures with shorter trace lengths were captured by DLS of the MN, LL, and LN. One-by-three-meter panel maps at 1:10 scale are overlain on low-angle illumination photographs to document abundance, size, shape, and spacing of lithophysal cavities, rims, and spots in the LL. Linear traverses are used to map the abundance of lithostratigraphic features in the LL. Video logs and maps of boreholes are used to document abundance and location of lithostratigraphic features and fractures. Petrographic studies of thin sections for the UL, MN, and LL reveal lithostratigraphic and fracture characteristics at the centimeter and finer scale. Collectively, these studies indicate lateral continuity of the zones (and even some subzones) across the potential repository area and document the differences between and within the zones and subzones. For example, fracture sets are consistent in the potential repository area and differ only slightly from sets outside the area. The MN has more fractures with >1-m trace lengths than other zones, but the LL has proportionally more fractures with shorter trace lengths. The LL locally has 5 to 30 percent lithophysal cavities and 2 to 30 percent combined rims and spots. Thin sections from UL, MN, and LL indicate similar lithostratigraphic and fracture characteristics in borehole, surface, and tunnel exposures. JF - Abstracts with Programs - Geological Society of America AU - Buesch, David C AU - Beason, Steven C AU - Lung, Robert C AU - Eatman, George L W AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 59 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - lithostratigraphy KW - experimental studies KW - waste disposal sites KW - mechanical properties KW - mapping KW - properties KW - thin sections KW - Nye County Nevada KW - Miocene KW - variations KW - radioactive waste KW - Cenozoic KW - Topopah Spring Member KW - laboratory studies KW - fractures KW - Tertiary KW - boreholes KW - Neogene KW - tunnels KW - waste disposal KW - Yucca Mountain KW - Nevada KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52002593?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Methods+of+documenting+variability+in+lithostratigraphic+features%2C+fractures%2C+and+properties+in+the+Topopah+Spring+Tuff+at+Yucca+Mountain%2C+Nevada&rft.au=Buesch%2C+David+C%3BBeason%2C+Steven+C%3BLung%2C+Robert+C%3BEatman%2C+George+L+W%3BAnonymous&rft.aulast=Buesch&rft.aufirst=David&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=59&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - boreholes; Cenozoic; experimental studies; fractures; laboratory studies; lithostratigraphy; mapping; mechanical properties; Miocene; Neogene; Nevada; Nye County Nevada; properties; radioactive waste; Tertiary; thin sections; Topopah Spring Member; tunnels; United States; variations; waste disposal; waste disposal sites; Yucca Mountain ER - TY - JOUR T1 - The wetland continuum in the prairie pothole region AN - 52001653; 2003-029152 AB - The continuum of the hydrologic cycle in space and time provides a framework for integrating predictable and observable biological features of prairie wetlands. In landscapes characterized by isolated depressions containing wetlands, such as the prairie pothole region, the hydrologic continuum in space is defined by the ground-water system. The wetlands are surface-water expressions of larger ground-water watersheds, in which wetlands serve recharge and discharge functions with respect to ground water. The interaction of these wetlands with ground water, although a small part of their water budget, provides the primary control on delivery of solutes to and from the wetlands. Temporal variability of these interactions is controlled largely by precipitation and evaporation, the dominant components of their water budget. The Cottonwood Lake area in North Dakota has provided a field laboratory for developing and evaluating the wetland continuum concept because the area has experienced many years of relatively normal hydrologic conditions followed by an extreme drought and subsequent flood. The hydrologic continuum of prairie wetlands in space and time provides the necessary framework for integrating predictable and observable biological features of prairie wetlands in the same sense as that proposed for streams by the river continuum concept. In contrast to the river continuum, however, the continuum for prairie wetlands reflects strong gradients in both the spatial hydrologeologic characteristics among hydrologically interconnected wetlands as well as the temporal events that modify the biological productivity of individual wetlands as they cycle between wet and dry periods. Ecosystem studies at the Cottonwood Lake area over the past 30 years illustrate how spatial and temporal hydrologic gradients affect the biota of prairie pothole wetlands throughout wet and dry cycles. Data from the site were used to develop a conceptual model for the wetland continuum proposed here to facilitate valid comparisons among studies, thereby advancing the science and management of prairie pothole wetlands. JF - Abstracts with Programs - Geological Society of America AU - Euliss, Ned H AU - Winter, Thomas C AU - Rosenberry, Donald O AU - LaBaugh, James W AU - Nelson, Richard D AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 57 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - hydrology KW - prairies KW - surface water KW - rivers and streams KW - water management KW - solutes KW - ecosystems KW - water balance KW - potholes KW - biota KW - ground water KW - drought KW - North Dakota KW - controls KW - hydrologic cycle KW - wetlands KW - floods KW - landscapes KW - Cottonwood Lake KW - productivity KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52001653?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+wetland+continuum+in+the+prairie+pothole+region&rft.au=Euliss%2C+Ned+H%3BWinter%2C+Thomas+C%3BRosenberry%2C+Donald+O%3BLaBaugh%2C+James+W%3BNelson%2C+Richard+D%3BAnonymous&rft.aulast=Euliss&rft.aufirst=Ned&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=57&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - biota; controls; Cottonwood Lake; drought; ecosystems; floods; ground water; hydrologic cycle; hydrology; landscapes; North Dakota; potholes; prairies; productivity; rivers and streams; solutes; surface water; United States; water balance; water management; wetlands ER - TY - JOUR T1 - What the heck is happening to mine pool water at Leadville? AN - 52001482; 2003-029119 AB - The hydrogeology of the Leadville Mining District is complex and presents a serious challenge when the goal is to describe what and what may not be "mine pool water" in the presence of shallow and deep ground water and seasonal recharge. This catchment is at an altitude of more than 3,000-4300 m asl and thus contains a significant portion of snow and ice that, until this summer, was essentially perennial. A CERCLA investigation involves California Gulch, an essentially perennial surface stream, that prior to construction of the Leadville Mine Drainage Tunnel (LMDT) also involved ground water that was part of the mine pool. Mine Pool Water currently discharges through the LMDT to a treatment plant operated by the U.S. Bureau of Reclamation, but unfortunately the state of repair of this tunnel is questionable at best. Data from the mine pool from the past decade show ominous rising ground-water levels and suggest that the efficiency of the drainage tunnel is declining. Unfortunately the rising ground water levels are not accompanied by a great amount of data and although it seems that mine pool waters may actually be rising, it is not clear why, since snow pack (and recharge?) has been declining for years. Using tracing and tritium data it appears that the LMDT waters are being mixed with surface waters, however, even though the largest amount of snow melt occurs in the spring, hydrographs seem to peak in September. Stable isotope data suggest that for the entire summer, frozen precipitation is the source of the recharge--possibly explained by the nature of recharge from the high altitude catchment area. Isotopic data collected at different times of the year show shifts in fractionation that sometimes suggest rapid recharge of mine workings in the "vadose zone", significant components of high-altitude surface water, and possibly transfer of other water from a catchment area that discharges through the adjacent Yak Drainage Tunnel. Possible methods of measuring the relative contributions of these waters may seem laborious but this may have to be done to even partially understand what is what. JF - Abstracts with Programs - Geological Society of America AU - Holmes, Michael AU - Davies, Gareth J AU - Wireman, Michael AU - King, Karmen AU - Gertson, Jord N AU - Stefanic, Jenelle M AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 52 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - California Gulch KW - isotope fractionation KW - isotopes KW - atmospheric precipitation KW - tritium KW - Leadville mining district KW - ground water KW - radioactive isotopes KW - levels KW - hydrographs KW - tunnels KW - snow KW - tracers KW - discharge KW - water KW - Superfund KW - surface water KW - pollution KW - recharge KW - Lake County Colorado KW - hydrogen KW - seasonal variations KW - Colorado KW - 02D:Isotope geochemistry KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52001482?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=What+the+heck+is+happening+to+mine+pool+water+at+Leadville%3F&rft.au=Holmes%2C+Michael%3BDavies%2C+Gareth+J%3BWireman%2C+Michael%3BKing%2C+Karmen%3BGertson%2C+Jord+N%3BStefanic%2C+Jenelle+M%3BAnonymous&rft.aulast=Holmes&rft.aufirst=Michael&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=52&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - atmospheric precipitation; California Gulch; Colorado; discharge; ground water; hydrogen; hydrographs; isotope fractionation; isotopes; Lake County Colorado; Leadville mining district; levels; pollution; radioactive isotopes; recharge; seasonal variations; snow; Superfund; surface water; tracers; tritium; tunnels; United States; water ER - TY - JOUR T1 - Microstructural and mineralogic controls on the release of trace elements and acid; solid-phase analyses of mine wastes from humidity cell tests AN - 52001416; 2003-029112 AB - Two proprietary mine-waste samples were subjected to well-oxygenated conditions and rinsed weekly in humidity cell tests to: (1) determine the long-term potential of waste to generate acid and (2) follow trace-metal release. Potential acid producing minerals in the mine-waste samples are pyrite, tetrahedrite-tennanite, and jarosite. Unleached samples have the following potentially toxic trace elements: As (45-120 ppm), Cu (60-320 ppm), and Zn (30-2,500 ppm). The first mine-waste sample exhibits multiple stages of deformation and sulfide mineralization. Early Mg-rich carbonate- and siderite-filled microveins host pyrite and arsenic-bearing pyrite. Silica-filled microveins that host Cu-, As-, and Sb-bearing sulfides crosscut the carbonate microveins. Post-mortem XRD examination of leached material indicates that most of the carbonate minerals dissolved during the course of the humidity cell test. Therefore, under natural exposure conditions, the carbonate minerals could be expected to go into solution, thus exposing pyrite to oxidation, and releasing arsenic into ground-water and surface-water systems. Conversely, silica-filled microveins and associated sulfides were still intact in the leached material. Therefore, the trace metals contained in the sulfides within the siliceous microveins may be released to the ground-water system more slowly over a greater time period. The second mine-waste sample was jarosite-rich and contained very little pyrite, so we examined jarosite as a potential source of acid generation. There were few differences between fresh and leached samples of this material. Electron-beam analyses consistently revealed less than stoichiometric K:Fe ratios (<1:3), indicating a K deficiency. In the absence of any other detectable cation, we presume H (sub 3) O (super +) is present to make up that deficiency and is responsible for acidic leachates generated by this material. JF - Abstracts with Programs - Geological Society of America AU - Diehl, S F AU - Smith, K S AU - Desborough, G A AU - White, W W AU - Lapakko, K A AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 50 EP - 51 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - zinc KW - X-ray diffraction data KW - copper KW - ground water KW - tennanite KW - controls KW - sulfosalts KW - mineralization KW - leachate KW - trace elements KW - acids KW - acid mine drainage KW - sulfates KW - surface water KW - arsenic KW - pollution KW - veins KW - jarosite KW - metals KW - testing KW - pyrite KW - leaching KW - sulfides KW - tetrahedrite KW - sulfantimonites KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52001416?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Microstructural+and+mineralogic+controls+on+the+release+of+trace+elements+and+acid%3B+solid-phase+analyses+of+mine+wastes+from+humidity+cell+tests&rft.au=Diehl%2C+S+F%3BSmith%2C+K+S%3BDesborough%2C+G+A%3BWhite%2C+W+W%3BLapakko%2C+K+A%3BAnonymous&rft.aulast=Diehl&rft.aufirst=S&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=50&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - acid mine drainage; acids; arsenic; controls; copper; ground water; jarosite; leachate; leaching; metals; mineralization; pollution; pyrite; sulfantimonites; sulfates; sulfides; sulfosalts; surface water; tennanite; testing; tetrahedrite; trace elements; veins; X-ray diffraction data; zinc ER - TY - JOUR T1 - Geological control of plant species distribution in Wyoming AN - 51994524; 2003-035038 AB - The natural environment of Wyoming is, to a very large extent, geologically controlled. Rocks and sediments of all geological ages compose the mountain ranges, their bordering cuestas and the structural basins lying between the ranges. These substrates provide a broad range of geochemical and physical substrates for plant growth that are just now being understood. The spatial distribution of a cross-section of the state flora was statistically tested in relation to nine climatic variables, the basic vegetative cover types, and three geologically derived variables: bedrock type, surficial geology, and soil. The relationships between species distributions with these variables were tested by classification tree analysis, a method permitting the assessment of importance of the environmental variables. Bedrock type was one of the controlling variables in about 80% of the cases and was the first determinant for distribution in about 21% of the cases. Thus, geology is a dominating feature in the distribution of plants in an environment ranging from rolling plains, dissected basins, cuesta complexes and sedimentary and crystalline mountains. The relative importance of substrate across this range of environments will be analyzed and hypotheses for the possible causation of these relationships will be explored. JF - Abstracts with Programs - Geological Society of America AU - Reiners, William A AU - Fertig, Walter C AU - Thurston, Robert C AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 75 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - soils KW - bedrock KW - Plantae KW - erosion features KW - vegetation KW - Wyoming KW - substrates KW - controls KW - classification KW - geochemistry KW - cuestas KW - growth KW - 09:Paleobotany KW - 25:Soils UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51994524?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Geological+control+of+plant+species+distribution+in+Wyoming&rft.au=Reiners%2C+William+A%3BFertig%2C+Walter+C%3BThurston%2C+Robert+C%3BAnonymous&rft.aulast=Reiners&rft.aufirst=William&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=75&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - bedrock; classification; controls; cuestas; erosion features; geochemistry; growth; Plantae; soils; substrates; United States; vegetation; Wyoming ER - TY - JOUR T1 - An integrated approach to 3-dimensional data collection at dinosaur sites in the Rocky Mountain West AN - 51842466; 2004-044663 AB - Public lands in the Rocky Mountain West are home to an abundance of vertebrate paleontological resources. These fossils are typically found in badlands terrain and at some distance from convenient transportation. These and other factors often make conventional surveying and mapping techniques very time-consuming and problematic. Even obtaining quality images, at useful scales with limited distortions, can be difficult. In order to preserve the value of these unique paleontological resources, an integrated approach to close-range photogrammetry and high-accuracy ground-control surveying has been utilized. Recently a variety of ground-control collection methods, including high-accuracy GPS and Light Detection and Ranging (LIDAR), were investigated. The LIDAR scanner is a ground-based, high-speed, system that collects up to 800 x, y, and z data points per second with an accuracy of + or -6 mm. The transportable, robust, field unit provides near real time access to point cloud data allowing for accurate measurements to be made in the field. In addition, several methods for taking high-resolution, low-distortion photographs of localities were also investigated. These methods included using tripods of various heights, remote-controlled airplanes, and an aerial camera blimp system. The blimp system consists of a 6-meter-long, helium-filled blimp, which is capable of lifting a camera to 80 meters above the ground. Photographs are taken using a medium-format camera suspended below the blimp. The on-board camera is electronically positioned from the ground and can be oriented to acquire photographs that are near vertical or oblique to the subject. These various field data collection methods have been successfully integrated using softcopy photogrammetry to produce digital terrain models, which can represent the surface to a precision of 1 cm or less. The 3-D data were brought into GIS software where they are displayed, combined with photographs, and rotated for viewing from different perspectives. These technologies were utilized at Late Jurassic bonebeds in Wyoming and Utah, as well as dinosaur tracksites in Wyoming, Colorado, and Utah. Information gained from these sites is aiding in our understanding of community dynamics and preservational history of dinosaur populations in the Rocky Mountain West. JF - Abstracts with Programs - Geological Society of America AU - Matthews, Neffra A AU - Noble, Tom A AU - Breithaupt, Brent H AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 204 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Global Positioning System KW - communities KW - laser methods KW - geophysical surveys KW - data acquisition KW - Western U.S. KW - dinosaurs KW - North America KW - high-resolution methods KW - Chordata KW - Upper Jurassic KW - three-dimensional models KW - Jurassic KW - radar methods KW - tracks KW - public lands KW - Mesozoic KW - Reptilia KW - Wyoming KW - lidar methods KW - surveys KW - Utah KW - Vertebrata KW - Colorado KW - accuracy KW - Tetrapoda KW - Rocky Mountains KW - instruments KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51842466?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=An+integrated+approach+to+3-dimensional+data+collection+at+dinosaur+sites+in+the+Rocky+Mountain+West&rft.au=Matthews%2C+Neffra+A%3BNoble%2C+Tom+A%3BBreithaupt%2C+Brent+H%3BAnonymous&rft.aulast=Matthews&rft.aufirst=Neffra&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=204&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - accuracy; Chordata; Colorado; communities; data acquisition; dinosaurs; geophysical surveys; Global Positioning System; high-resolution methods; instruments; Jurassic; laser methods; lidar methods; Mesozoic; North America; public lands; radar methods; Reptilia; Rocky Mountains; surveys; Tetrapoda; three-dimensional models; tracks; United States; Upper Jurassic; Utah; Vertebrata; Western U.S.; Wyoming ER - TY - JOUR T1 - Geoarchaeology of paleoindian sites in South Park, Colorado AN - 51840425; 2004-044528 AB - South Park is an intermontane basin in the central Rocky Mountains of Colorado. Prior to the South Park Archaeological Project very little was known concerning the Paleoindian occupation of the basin. Paleoindian sites located during the survey indicate that South Park has been occupied since the Pleistocene/Holocene transition. Evidence for early Holocene occupation includes sites representing the Foothills/Mountain Complex (8,600-7,800 RCYBP) and the Cody Complex (9,200-8,400 RCYBP) in the northern part of South Park. These sites are surface scatters sparsely distributed on higher, relatively stable landforms. A Folsom Site (10,800-10,200 RCYBP) and two rockshelters, thought to contain Paleoindian occupations, were also recorded in the northern part of the park. Middle and Late Holocene sites have been found both on higher landforms and buried in alluvium along modern drainages. Numerous springs and spring-related deposits occur near the mountain fronts in South Park. Remains of a Columbian mammoth (Mammuthus columbi) have been recovered at 9,600 in spring deposits buried by colluvium. Recent test excavations did not recover any evidence of human association, although the nature of green-fractures on the limb bone is suggestive of potential human action. The South Park Archaeological Project is sampling a wide range of geomorphic landforms to locate sites representing the full range of human occupation in the basin. Areas of extensive Holocene alluvium occur in the southern and southeastern portion of South Park along Four Mile Creek, Trout Creek, the South Platte River, and tributaries entering the South Platte from the north. Survey in this area is focused on identifying sites on landform surfaces and in bank exposures of major and minor drainages. Extensive deposits of Pleistocene glacial drift and Pleistocene and Holocene outwash gravels occur in the north and west parts of South Park. Survey in this area is concentrating on the surface of Pleistocene fills and exposures in Holocene outwash deposits. JF - Abstracts with Programs - Geological Society of America AU - Klawon, Jeanne E AU - Lincoln, Thomas AU - Holen, Steven AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 182 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - lower Holocene KW - outwash KW - Mammuthus columbi KW - Fourmile Creek KW - gravel KW - Holocene KW - upper Pleistocene KW - Trout Creek KW - Elephantoidea KW - Cenozoic KW - Theria KW - South Platte River KW - bones KW - sediments KW - rock shelters KW - basins KW - springs KW - Elephantidae KW - Mammuthus KW - Eutheria KW - paleoindian KW - North America KW - Chordata KW - archaeology KW - South Park KW - Quaternary KW - clastic sediments KW - human activity KW - drainage KW - Mammalia KW - Proboscidea KW - Central Rocky Mountains KW - South Park Archaeological Project KW - archaeological sites KW - Pleistocene KW - intermontane basins KW - alluvium KW - Vertebrata KW - Colorado KW - Tetrapoda KW - Rocky Mountains KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51840425?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Geoarchaeology+of+paleoindian+sites+in+South+Park%2C+Colorado&rft.au=Klawon%2C+Jeanne+E%3BLincoln%2C+Thomas%3BHolen%2C+Steven%3BAnonymous&rft.aulast=Klawon&rft.aufirst=Jeanne&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=182&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - alluvium; archaeological sites; archaeology; basins; bones; Cenozoic; Central Rocky Mountains; Chordata; clastic sediments; Colorado; drainage; Elephantidae; Elephantoidea; Eutheria; Fourmile Creek; gravel; Holocene; human activity; intermontane basins; lower Holocene; Mammalia; Mammuthus; Mammuthus columbi; North America; outwash; paleoindian; Pleistocene; Proboscidea; Quaternary; rock shelters; Rocky Mountains; sediments; South Park; South Park Archaeological Project; South Platte River; springs; Tetrapoda; Theria; Trout Creek; United States; upper Pleistocene; Vertebrata ER - TY - JOUR T1 - Sourcing turquoise using O and H isotopes AN - 51839427; 2004-044537 AB - The evolution of the turquoise trade played a crucial role in the cultural intensification of social systems along the northern frontier of Mesoamerica and southwestern portions of the United States. Reconstruction of prehistoric southwestern turquoise trade networks depends on accurate knowledge of the sources of materials. Therefore, a method that can distinguish between turquoise source areas is important because once signatures for source areas have been established, artifacts from prehistoric archaeological sites can then be tested and inferences about the organization of their socio-political organization can be evaluated. Despite numerous trace element studies and a few isotopic studies, none have satisfactorily differentiated between all the turquoise source areas that exist in southwestern United States. We use a combination of geologic and a relatively non-destructive isotope analysis method (O and H isotope analyses by ion microprobe) to characterize and differentiate between seven turquoise mining districts in southwestern United States, which are potential source areas. The isotopic composition of O and H atoms in precipitation varies with latitude as well as other factors. Preliminary analyses of turquoise from four mining regions in the southwestern United States indicate that this regional isotopic variation is reflected in the water molecules bound into turquoise. Turquoise from each mining district has a unique O and H isotopic signature. The theoretical basis for this regional variation in the O and H isotopes of turquoise is that rainwater was the solvent forming the turquoise deposit. Thus, the O and H isotopic composition of turquoise is potentially a powerful tool for characterizing and distinguishing between source regions. The analysis of additional turquoise samples from a wide range of sources promises to provide a method to differentiate among the various turquoise sources. If preliminary results are confirmed, a "source fingerprint" will permit archaeologists to identify the sources of turquoise found at sites across the continent and providing new insight into pre-contact trade patterns in North America. JF - Abstracts with Programs - Geological Society of America AU - Fayek, Mostafa AU - Riciputi, Lee R AU - Milford, Homer E AU - Mathien, Frances Joan AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 184 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - oxygen KW - ion probe data KW - isotopes KW - mass spectra KW - atmospheric precipitation KW - stable isotopes KW - artifacts KW - spectra KW - trace elements KW - geochemistry KW - rain KW - water KW - archaeology KW - isotope ratios KW - phosphates KW - O-18/O-16 KW - Southwestern U.S. KW - hydrochemistry KW - turquoise KW - archaeological sites KW - D/H KW - hydrogen KW - reconstruction KW - Central America KW - 24:Quaternary geology KW - 02D:Isotope geochemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51839427?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Sourcing+turquoise+using+O+and+H+isotopes&rft.au=Fayek%2C+Mostafa%3BRiciputi%2C+Lee+R%3BMilford%2C+Homer+E%3BMathien%2C+Frances+Joan%3BAnonymous&rft.aulast=Fayek&rft.aufirst=Mostafa&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=184&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - archaeological sites; archaeology; artifacts; atmospheric precipitation; Central America; D/H; geochemistry; hydrochemistry; hydrogen; ion probe data; isotope ratios; isotopes; mass spectra; O-18/O-16; oxygen; phosphates; rain; reconstruction; Southwestern U.S.; spectra; stable isotopes; trace elements; turquoise; United States; water ER - TY - JOUR T1 - Gypsum karst of the Lykins Formation and effects for Colorado Front Range water projects; Horsetooth and Carter Lake reservoirs AN - 51829832; 2004-049550 AB - The Lykins Formation is a Permo-Triassic sedimentary formation consisting largely of interbedded siltstones, claystones, limestones and gypsum-anhydrite evaporite deposits that outcrops along the Colorado Front Range of the Southern Rocky Mountains. Previous geologic work on the Lykins Formation is very limited. Investigations over the past 12 years by Reclamation geologists have revealed that the Lykins contains structures and stratigraphy typical of gypsum karst throughout the entire thickness of the Lykins Formation. Some of these features include extensive intrastratal breccias, and large circular or near-circular paleo collapse chimneys that cross-cut the entire Formation as well as a paleo-karst network of solution cavities and conduits in highly pervious limestone beds and discontinuous bodies of massive gypsum and anhydrite at relatively shallow depths. The Lykins Formation was uplifted and tilted to the east during the Laramide. Because the Lykins Formation consists of weak sedimentary lithologies, it is typically found in long strike-valleys that have been eroded along the extent of the Front Range. Two major federal water projects; Horsetooth Reservoir and Carter Lake Reservoir were constructed in these valleys in the late 1940's by the U.S. Bureau of Reclamation as part of the Colorado Big-Thompson Project. These reservoirs are key to the infrastructure that supply water for irrigation and municipal uses as well as power generation to Colorado Front-Range communities. During the late 1980's sinkholes formed at the south end of Horsetooth Reservoir and through the 1990's seepage increased dramatically at Horsetooth Dam. In late 2000, a sinkhole was discovered on the upstream toe area of the dam. At Carter Lake Dam No. 2 over 4 cubic ft. per second of seepage exits downstream of the dam. A portion of this seepage is nearly saturated with dissolved gypsum. These changing seepage conditions are attributed to karst dissolution and erosional processes induced by reservoir seepage. The investigations at these reservoirs and consequent dam-safety concerns have led to major modifications at Horsetooth Dam. JF - Abstracts with Programs - Geological Society of America AU - Pearson, Ronald M AU - Hurcomb, Douglas R AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 216 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - limestone KW - anhydrite KW - Front Range KW - erosion KW - karst KW - solution KW - seepage KW - irrigation KW - Carter Lake Reservoir KW - sedimentary rocks KW - Horsetooth Reservoir KW - Triassic KW - Southern Rocky Mountains KW - gypsum KW - siltstone KW - outcrops KW - sedimentary structures KW - water use KW - North America KW - water supply KW - chemically precipitated rocks KW - sulfates KW - Paleozoic KW - surface water KW - Permian KW - hydroelectric energy KW - evaporites KW - Mesozoic KW - Upper Permian KW - claystone KW - sinkholes KW - Colorado KW - carbonate rocks KW - solution features KW - clastic rocks KW - Rocky Mountains KW - Lykins Formation KW - 23:Geomorphology KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51829832?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Gypsum+karst+of+the+Lykins+Formation+and+effects+for+Colorado+Front+Range+water+projects%3B+Horsetooth+and+Carter+Lake+reservoirs&rft.au=Pearson%2C+Ronald+M%3BHurcomb%2C+Douglas+R%3BAnonymous&rft.aulast=Pearson&rft.aufirst=Ronald&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=216&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - anhydrite; carbonate rocks; Carter Lake Reservoir; chemically precipitated rocks; clastic rocks; claystone; Colorado; erosion; evaporites; Front Range; gypsum; Horsetooth Reservoir; hydroelectric energy; irrigation; karst; limestone; Lykins Formation; Mesozoic; North America; outcrops; Paleozoic; Permian; Rocky Mountains; sedimentary rocks; sedimentary structures; seepage; siltstone; sinkholes; solution; solution features; Southern Rocky Mountains; sulfates; surface water; Triassic; United States; Upper Permian; water supply; water use ER - TY - JOUR T1 - Pleistocene exhumation rates of Wyoming intermontane basins from (U-Th)/He dating of clinker AN - 51790475; 2004-077536 AB - Natural burning of Tertiary coal beds has produced thermally metamorphosed rocks (clinker) over large regions of basins and plains in Wyoming, Montana and North Dakota. Being more resistant to erosion than surrounding Tertiary shales and sandstones, clinker forms distinctive geomorphic features and frequently caps escarpments with tens to hundreds of meters of relief. Coal is ignited by several processes, including range fires and spontaneous combustion, but it only burns when above the water table. Regional erosional exhumation lowers the water table relative to bedrock, exposing structurally deeper levels of coal to burning. Burning resets low-temperature thermochronometers in detrital minerals in and above the coal beds, providing an age of burning, and in some cases constraining the rate of fluvial incision and erosional exhumation in the region. We measured (U-Th)/He ages of detrital zircons in clinker from the Powder River Basin of northeastern Wyoming. Two samples from the DeSmet clinker on the western edge of basin are 65+ or -10 and 12+ or -3 ka (former 36 m above latter). On the eastern side of the basin in the Wyodak clinker of the Rochelle Hills, ages are 513+ or -41 ka, 486+ or -38 ka and 478+ or -39 ka (replicates), 207+ or -17 ka, 191+ or -15 ka and 206+ or -16 ka (replicates), and 175+ or -88 ka. The Wyodak coal and clinker in the Rochelle Hills dips gently to the west, exposing a structural depth of 125 m over 8 km. Zircon (U-Th)/He ages in the Little Thunder Creek escarpment region decrease systematically from 513 to approximately 175 ka in an east-to-west transect through about 60-70 m of structural depth. These ages are concordant with, but generally more precise than, zircon fission-track ages from other samples from the region (Coates and Naeser, 1984). To the extent that these time-transgressive ages represent lowering of the water table relative to bedrock due to regional erosion, they can be used to estimate a regional erosion rate of about 0.1-0.2 mm/yr for this part of the basin. These rates are consistent with apatite fission-track data from boreholes in the southern Powder River basin (Naeser, 1992), which, if interpreted in terms of exhumation alone, require post-Late-Miocene erosion rates of at least 0.1 mm/yr. We are currently dating samples from other dipping or stacked sequences of clinker units elsewhere in the region for erosion-rate constraints. JF - Abstracts with Programs - Geological Society of America AU - Reiners, Peter W AU - Heffern, Edward L AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 321 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - silicates KW - Little Thunder Creek KW - erosion KW - erosion rates KW - combustion KW - relief KW - fires KW - Cenozoic KW - (U-Th)/He KW - North Dakota KW - sedimentary rocks KW - dates KW - coal KW - orthosilicates KW - basins KW - absolute age KW - thermochronology KW - northeastern Wyoming KW - exhumation KW - Powder River basin KW - zircon group KW - processes KW - Quaternary KW - Rochelle Hills KW - zircon KW - rates KW - thermal metamorphism KW - metamorphism KW - Miocene KW - Montana KW - nesosilicates KW - clinker KW - Wyoming KW - Tertiary KW - Neogene KW - Pleistocene KW - intermontane basins KW - scarps KW - incised valleys KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51790475?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Pleistocene+exhumation+rates+of+Wyoming+intermontane+basins+from+%28U-Th%29%2FHe+dating+of+clinker&rft.au=Reiners%2C+Peter+W%3BHeffern%2C+Edward+L%3BAnonymous&rft.aulast=Reiners&rft.aufirst=Peter&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=321&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - (U-Th)/He; absolute age; basins; Cenozoic; clinker; coal; combustion; dates; erosion; erosion rates; exhumation; fires; incised valleys; intermontane basins; Little Thunder Creek; metamorphism; Miocene; Montana; Neogene; nesosilicates; North Dakota; northeastern Wyoming; orthosilicates; Pleistocene; Powder River basin; processes; Quaternary; rates; relief; Rochelle Hills; scarps; sedimentary rocks; silicates; Tertiary; thermal metamorphism; thermochronology; United States; Wyoming; zircon; zircon group ER - TY - JOUR T1 - Newly recognized reef fabric from the middle Capitan reefs (Middle Permian), Guadalupe Mountains, Texas AN - 51788106; 2004-077648 AB - A heretofore unrecognized reef fabric was recently found in two localities in the Middle Capitan reef (Yates Formation equivalent). The framework for this fabric consists of sub-parallel colonies of Gigantospongia growing in a semi-erect or procumbent orientation. Individual plates are 0.5 to 2 meters wide and are often spaced 5-10 centimeters from immediate neighbors. Vertical orientation ranges from 40 to 70 degrees. Upwardly oriented sides are generally covered by micritic limestone or wackestone with few, if any, epibionts. Downwardly oriented sides exhibit many attached epibionts surrounded by botryoidal marine cements with voids coated or filled by isopachous marine cements, indicating the framework provided cryptic habitat for many smaller organisms. The largest area covered by this fabric is at least 30 meters across, probably larger, and the horizontal axes of platy sponges in this colony are generally oblique to the regional reef trend. The center of this distribution as currently known is about 15 meters below the top of characteristic reefal lithologies. The second area is currently only identifiable over a distance of 3 meters, but weathering and vegetation obscure the outcrops laterally. The horizontal axes of these sponges are generally sub-parallel to regional reef trend, and the occurrence is within one or two meters of the top of the highest local reef lithologies. This is also the first report of Gigantospongia in Middle Capitan reef lithologies and the first from the southern end of the Guadalupe Mountains. This Gigantospongia is probably a new species, as it is smaller than G. discoforma in overall proportions and thickness and has a significantly different growth habit. It has been found at six different locations in Guadalupe Mountains National Park, all within Middle Capitan reefs. It is not known if the other four localities represent the same reef fabric due to restricted outcrop size and weathering which obscures surficial details. However, one occurrence is on a float boulder that contains two parallel individuals spaced 5 centimeters apart. JF - Abstracts with Programs - Geological Society of America AU - Bell, Gorden L AU - Crow, Christopher J AU - Rigby, J Keith AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 356 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Middle Permian KW - Gigantospongia KW - orientation KW - Guadalupe Mountains KW - Porifera KW - Guadalupian KW - colonial taxa KW - Paleozoic KW - West Texas KW - Texas KW - Culberson County Texas KW - vegetation KW - Permian KW - weathering KW - Guadalupe Mountains National Park KW - habitat KW - Yates Formation KW - Invertebrata KW - Capitan Formation KW - outcrops KW - cement KW - fabric KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51788106?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Newly+recognized+reef+fabric+from+the+middle+Capitan+reefs+%28Middle+Permian%29%2C+Guadalupe+Mountains%2C+Texas&rft.au=Bell%2C+Gorden+L%3BCrow%2C+Christopher+J%3BRigby%2C+J+Keith%3BAnonymous&rft.aulast=Bell&rft.aufirst=Gorden&rft.date=2002-10-01&rft.volume=13&rft.issue=4&rft.spage=575&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vegetation+Science&rft.issn=11009233&rft_id=info:doi/10.1043%2F1100-9233%282002%29013%280575%3ALTDOWA%292.0.CO%3B2 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Capitan Formation; cement; colonial taxa; Culberson County Texas; fabric; Gigantospongia; Guadalupe Mountains; Guadalupe Mountains National Park; Guadalupian; habitat; Invertebrata; Middle Permian; orientation; outcrops; Paleozoic; Permian; Porifera; Texas; United States; vegetation; weathering; West Texas; Yates Formation ER - TY - JOUR T1 - Developing coastal mapping protocols; an interagency approach for the effective management of coastal national parks AN - 51787788; 2004-077607 AB - A comprehensive geologic resource inventory is necessary for the effective management of our coastal national parks. In coastal areas, surficial and subsurface geology are intertwined with park flora, fauna, soil, water and cultural resources. In addition, relative sea level rise, geologic hazards, and anthropogenic modifications create an immediate need for detailed geologic mapping in coastal areas. A workshop held on June 25-27, 2002 at Canaveral National Seashore, brought together 38 federal, state and private industry employees. The participants, including coastal geologists, park managers, resource specialists, information technology specialists and inventory & monitoring coordinators, worked to establish coastal mapping protocols for the Atlantic, Gulf, and Caribbean regions within the National Park Service. Workshop participants discussed mapping needs and formulated a list of specific mapping units for coastal areas. The chosen major coastal map divisions include Anthropogenic, Supratidal, Intertidal, Subtidal, and Riverine features. This list of coastal map units will be revised as park-specific needs are identified during individual coastal park scoping sessions. One goal of this project is to provide seamless coverage from emergent to submergent geologic features. We are also investigating effective methods to characterize subsurface geology in coastal areas. Adjacent areas outside of park boundaries are also of interest, but will probably be mapped in lesser detail. Through interagency partnerships, including USGS, NASA, state, academic, and private industry, the National Park Service will map important geologic resources in coastal national parks. The final mapping products will enable park managers to effectively monitor changes in coastal areas, and will aid in the understanding of geologic processes affecting coastal health and sustainability. JF - Abstracts with Programs - Geological Society of America AU - Nelson, Kimberly A AU - Beavers, Rebecca AU - Heise, Bruce AU - Connors, Tim AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 350 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - soils KW - U. S. National Park Service KW - human activity KW - government agencies KW - national parks KW - mapping KW - public lands KW - intertidal environment KW - subtidal environment KW - supratidal environment KW - sustainable development KW - coastal environment KW - water resources KW - fluvial environment KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51787788?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Developing+coastal+mapping+protocols%3B+an+interagency+approach+for+the+effective+management+of+coastal+national+parks&rft.au=Nelson%2C+Kimberly+A%3BBeavers%2C+Rebecca%3BHeise%2C+Bruce%3BConnors%2C+Tim%3BAnonymous&rft.aulast=Nelson&rft.aufirst=Kimberly&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=350&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - coastal environment; fluvial environment; government agencies; human activity; intertidal environment; mapping; national parks; public lands; soils; subtidal environment; supratidal environment; sustainable development; U. S. National Park Service; United States; water resources ER - TY - JOUR T1 - Developing paleontological resource monitoring strategies for the National Park Service AN - 51776789; 2005-000329 AB - Paleontological resources are non-renewable resources that possess scientific and educational values. Our ability to manage and protect fossils is contingent upon our understanding of their occurrence and distribution, both geologic and geographic, along with the factors that threaten their stability/sustainability. Within the National Park Service, a paleontological resource inventory strategy has been established to compile baseline paleontological resource data. This data can support both scientific and management objectives. This work represents a first effort to identify and establish the critical elements related to the monitoring of in situ paleontological resources in National Park Service areas. Paleontological resources at or near the surface will inevitably deteriorate over time if unrecognized. The monitoring design involves the identification of those variables that threaten or impact in situ fossils. These include physical, chemical, biological, as well as human factors impacting fossils. Rates of weathering and erosion, climatic conditions, topography, and a wide variety of human related activities are all considered as part of this assessment. A conceptual model has been developed that can be adapted for the monitoring of paleontological resources in the over 150 National Park Service areas identified with fossils. JF - Abstracts with Programs - Geological Society of America AU - Koch, Alison L AU - Santucci, Vincent L AU - McDonald, H Gregory AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 422 EP - 423 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - protection KW - monitoring KW - U. S. National Park Service KW - government agencies KW - national parks KW - erosion rates KW - public lands KW - weathering KW - paleontology KW - evaluation KW - models KW - topography KW - fossils KW - design KW - climate KW - 08:General paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51776789?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Developing+paleontological+resource+monitoring+strategies+for+the+National+Park+Service&rft.au=Koch%2C+Alison+L%3BSantucci%2C+Vincent+L%3BMcDonald%2C+H+Gregory%3BAnonymous&rft.aulast=Koch&rft.aufirst=Alison&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=422&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - climate; design; erosion rates; evaluation; fossils; government agencies; models; monitoring; national parks; paleontology; protection; public lands; topography; U. S. National Park Service; United States; weathering ER - TY - JOUR T1 - Chemistry, geologic controls, and recharge areas for springs in Courthouse Wash, Arches National Park, Utah AN - 51776189; 2005-000326 AB - Springs in western Arches National Park support the base flow of Courthouse Wash, intermittent flow in Sevenmile Canyon, and a riparian environment that is critical to park ecology. To assist efforts to preserve the quality and quantity of spring flow, we analyzed flow records and chemistry, characterized the geologic controls on spring flow, and estimated recharge areas for the springs. Courthouse Wash Boundary Spring (CWBS) discharges sodium-calcium-bicarbonate-type water with TDS <275 mg/L. Sevenmile Canyon Boundary Spring (SCBS) discharges calcium-bicarbonate-type water with TDS <155 mg/L. Water chemistry, temperature, hardness, and dissolved oxygen values reflect near-surface processes only. These data indicate that the main source for spring flow is the shallow Moab Member aquifer, an eolian sandstone in the Jurassic Curtis Formation that crops out adjacent to the springs. CWBS water also includes a saline source, perhaps alluvium derived in part from the Morrison and Mancos Formations upstream. The Courthouse Wash springs are part of a shallow, perched flow system within the Moab Member aquifer. The aquifer is unconfined where exposed, and confined below mudstones of the overlying Summerville and Morrison Formations. Recharge is solely by infiltration of precipitation on Moab Member outcrop. The gently dipping limbs of the Courthouse syncline guide flow toward Courthouse Wash, coincident with the syncline axis. All springs and seeps in the system discharge from the Moab Member. Courthouse Wash and Sevenmile Canyon divide the spring system into two main groups with different recharge areas. We used a water-budget method to estimate recharge areas for the two spring groups. The eastern group, including CWBS, requires recharge from 2.0 square miles of Moab Member outcrop east of Courthouse Wash, and the western spring group, including SCBS, requires recharge from 1.7 square miles of outcrop west of Courthouse Wash. Both estimates are consistent with exposed areas of Moab Member adjacent to and upgradient from the springs. Future water development will most likely be on lands NW of the springs, where the Moab Member is in the subsurface. Increased withdrawal from the Moab Member there could affect spring flow by decreasing head in the confined part of the Moab Member aquifer. JF - Abstracts with Programs - Geological Society of America AU - Hurlow, Hugh A AU - Bishop, Charles E AU - Harte, James AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 422 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - oxygen KW - development KW - Cretaceous KW - seepage KW - temperature KW - ground water KW - Curtis Formation KW - controls KW - dip KW - perched aquifers KW - folds KW - sediments KW - springs KW - Morrison Formation KW - outcrops KW - ecology KW - hardness KW - discharge KW - geochemistry KW - Upper Jurassic KW - Sevenmile Canyon KW - Jurassic KW - Courthouse Wash KW - clastic sediments KW - Mancos Shale KW - solutes KW - Moab Member KW - water balance KW - Middle Jurassic KW - hydrochemistry KW - Mesozoic KW - aquifers KW - Summerville Formation KW - recharge KW - Arches National Park KW - riparian environment KW - synclines KW - streamflow KW - infiltration KW - shallow aquifers KW - alluvium KW - Utah KW - water resources KW - 02B:Hydrochemistry KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51776189?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Chemistry%2C+geologic+controls%2C+and+recharge+areas+for+springs+in+Courthouse+Wash%2C+Arches+National+Park%2C+Utah&rft.au=Hurlow%2C+Hugh+A%3BBishop%2C+Charles+E%3BHarte%2C+James%3BAnonymous&rft.aulast=Hurlow&rft.aufirst=Hugh&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=422&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2014, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2014-03-14 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - alluvium; aquifers; Arches National Park; clastic sediments; controls; Courthouse Wash; Cretaceous; Curtis Formation; development; dip; discharge; ecology; folds; geochemistry; ground water; hardness; hydrochemistry; infiltration; Jurassic; Mancos Shale; Mesozoic; Middle Jurassic; Moab Member; Morrison Formation; outcrops; oxygen; perched aquifers; recharge; riparian environment; sediments; seepage; Sevenmile Canyon; shallow aquifers; solutes; springs; streamflow; Summerville Formation; synclines; temperature; United States; Upper Jurassic; Utah; water balance; water resources ER - TY - JOUR T1 - Research and educational applications of a Web-based paleontologic database for Florissant Fossil Beds National Monument AN - 51775304; 2005-000331 AB - The paleontological resources of Florissant Fossil Beds National Monument include about 1700 species of plants and insects that have been referenced in more than 380 publications over a period of 130 years. Many of the type specimens from this site have never been illustrated in publication, and often the publications do not indicate the museums at which the type specimens are housed. Currently, type and published collections of Florissant fossils are housed in at least 17 different museums throughout North America and Europe. Because this information pertaining to the Florissant fossils has become complexly scattered throughout the literature and between different museums, the National Park Service has developed a new database that integrates taxonomic, museum collection, and publication data into a single format. New photographs are now available for all of these specimens. The database is now coming online as a web site with three different portals designed to accommodate users ranging from scientific researchers to educators and students to the layperson. The web site will facilitate further research by providing easy access to information and photographs that document Florissant's taxonomic diversity, and it will lead researchers directly to the museums at which significant fossils are housed and the publications in which they were described. Updated taxonomic information forms a separate database to which all specimens are linked, providing higher taxonomic classifications of plants and insects based upon contemporary concepts. About 4000 pages of relevant publications are available in a digital archive linked to the bibliographic database. Another facet of the web site still under development will provide educators and students with curricula designed for high school and college students. These educational applications will use the database to draw random fossil samples that the students will identify and use to develop hypotheses about paleoclimate. For the layperson, the web site will provide a gallery of some of Florissant's most impressive fossils along with a description of the significance of the Florissant fossil beds. JF - Abstracts with Programs - Geological Society of America AU - Meyer, Herbert W AU - Lutz-Ryan, Linda AU - Wasson, Matthew S AU - Cook, Amanda AU - Kinchloe, April E AU - Drummond, Boyce A AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 423 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - type specimens KW - U. S. National Park Service KW - government agencies KW - data processing KW - education KW - paleoclimatology KW - World Wide Web KW - paleontology KW - Cenozoic KW - college-level education KW - Florissant Lake Beds KW - museums KW - Florissant Fossil Beds National Monument KW - data bases KW - curricula KW - Invertebrata KW - applications KW - taxonomy KW - species diversity KW - collections KW - Insecta KW - Plantae KW - high school KW - Paleogene KW - research KW - Tertiary KW - K-12 education KW - Arthropoda KW - Mandibulata KW - Florissant Colorado KW - Teller County Colorado KW - Colorado KW - Oligocene KW - 08:General paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51775304?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Research+and+educational+applications+of+a+Web-based+paleontologic+database+for+Florissant+Fossil+Beds+National+Monument&rft.au=Meyer%2C+Herbert+W%3BLutz-Ryan%2C+Linda%3BWasson%2C+Matthew+S%3BCook%2C+Amanda%3BKinchloe%2C+April+E%3BDrummond%2C+Boyce+A%3BAnonymous&rft.aulast=Meyer&rft.aufirst=Herbert&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=423&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - applications; Arthropoda; Cenozoic; collections; college-level education; Colorado; curricula; data bases; data processing; education; Florissant Colorado; Florissant Fossil Beds National Monument; Florissant Lake Beds; government agencies; high school; Insecta; Invertebrata; K-12 education; Mandibulata; museums; Oligocene; paleoclimatology; Paleogene; paleontology; Plantae; research; species diversity; taxonomy; Teller County Colorado; Tertiary; type specimens; U. S. National Park Service; United States; World Wide Web ER - TY - JOUR T1 - Platte River restoration AN - 51773576; 2005-000169 AB - The Lexington to Chapman reach of the Platte River in Nebraska is the focus of a proposed endangered-species-recovery program to restore some of the bird habitats that have been lost through channel narrowing and vegetation growth. One goal of the program is to restore channel habitat by making some areas of the main river channel shallower and wider, with water filling the channel during the spring and fall crane migration seasons, and with braided, dry sand bars emerging from low water during the summer nesting season. Minimal vegetation encroachment within the channel is also critical for the endangered birds. There is no intent to return the Platte to historic widths, but rather to restore a few wide, braided, channel reaches. The data and analyses from our study associate the channel narrowing with substantial reductions in river flow and the resulting expansion of vegetation, primarily caused by water development and drought, and by a decrease in sediment supply and resulting channel incision. Reductions in river flow account for most of the narrowing. Vegetation growing on sandbars creates wooded islands, dividing the river into narrow channels. Clear water from dams and canals causes channel incision, which initially has maximum scour impact near the sources of clear water. Local bed coarsening causes the erosion to migrate downstream over time. Channel narrowing and bed coarsening are geomorphic consequences of incision. Significant incision can currently be found in the reach immediately downstream from the Johnson-2 Canal Return, while smaller amounts of incision have been noted as far downstream as Kearney. With no additional changes to flow or sediment, it is anticipated that this channel narrowing will continue downstream to Chapman. The proposed plan for channel restoration includes: 1) the clearing and lowering of vegetated islands, and 2) annual pulse flows of short (3 day) duration from Kingsley Dam. The clearing and lowering of fine-grained river islands would immediately increase the area of wide, open channel, and add finer sand to the riverbed. The annual pulse flows would build sandbars for summer nesting and would keep the sandbars clear from the previous year's seedlings. Implementation would occur by adaptive-management to ensure habitat improvement and avoidance of adverse impacts. JF - Abstracts with Programs - Geological Society of America AU - Murphy, Peter J AU - Randle, Timothy J AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 232 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Grus canadensis KW - sediment supply KW - vegetation KW - remediation KW - drought KW - Platte River KW - Kingsley Dam KW - sediments KW - ecology KW - sand KW - migration KW - Chordata KW - endangered species KW - clastic sediments KW - fines KW - bars KW - channels KW - Aves KW - habitat KW - Vertebrata KW - Nebraska KW - incised valleys KW - Tetrapoda KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51773576?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Platte+River+restoration&rft.au=Murphy%2C+Peter+J%3BRandle%2C+Timothy+J%3BAnonymous&rft.aulast=Murphy&rft.aufirst=Peter&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=232&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Aves; bars; channels; Chordata; clastic sediments; drought; ecology; endangered species; fines; Grus canadensis; habitat; incised valleys; Kingsley Dam; migration; Nebraska; Platte River; remediation; sand; sediment supply; sediments; Tetrapoda; United States; vegetation; Vertebrata ER - TY - JOUR T1 - Burned area emergency stabilization & rehabilitation; soil & watershed assessments AN - 51764448; 2005-009138 AB - Soils and watersheds are two of many resources affected by fire that are evaluated on burned federal lands by the Interagency-Burned Area Emergency Response (BAER) Teams. Fire effects to these resources and potential post-fire conditions and processes may result in adverse community and ecological consequences. The primary purpose for evaluating soils and watersheds is to determine if the fire created emergency watershed conditions. If emergency watershed conditions are found, then the magnitude and scope of the emergency is mapped and described, values at risk are identified, and treatment prescriptions are developed to protect the values at risk. Emergency watershed conditions include both hydrologic and soil factors, potential for flash floods and debris flows, and deterioration of soil condition, particularly loss of soil structure, that can lead to a decline in soil productivity. On occasion loss of vegetative cover may also contribute to wind erosion. Values at risk include human life, property and critical natural and cultural resources. This presentation highlights the objectives and parameters of the BAER soil and watershed assessment. JF - Abstracts with Programs - Geological Society of America AU - Davis, Marsha A AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 469 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - soils KW - processes KW - hydrology KW - stabilization KW - communities KW - geologic hazards KW - erosion KW - wind erosion KW - watersheds KW - mapping KW - effects KW - debris flows KW - evaluation KW - fires KW - mass movements KW - floods KW - risk assessment KW - ecology KW - productivity KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51764448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Burned+area+emergency+stabilization+%26amp%3B+rehabilitation%3B+soil+%26amp%3B+watershed+assessments&rft.au=Davis%2C+Marsha+A%3BAnonymous&rft.aulast=Davis&rft.aufirst=Marsha&rft.date=2002-10-01&rft.volume=38&rft.issue=8&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000945 LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - communities; debris flows; ecology; effects; erosion; evaluation; fires; floods; geologic hazards; hydrology; mapping; mass movements; processes; productivity; risk assessment; soils; stabilization; United States; watersheds; wind erosion ER - TY - JOUR T1 - The Death Valley fault system; an unappreciated seismic hazard to Death Valley National Park AN - 51763115; 2005-009068 AB - Death Valley National Park (DVNP) is in one of the most highly extended tectonic regions of the Western U.S. During the past century, damaging earthquakes (M5+) have rarely occurred in the Park, even though it is bisected by the Death Valley fault system (DVFS), which has active (Holocene) geomorphic expression along much of its length. The DVFS extends from Fish Lake Valley, NV, 300 km south through the entire length of DVNP. The DVFS is comprised of four fault zones: Fish Lake Valley (on the north), Northern Death Valley, Black Mountains, and Southern Death Valley (on the south). The centrally located Furnace Creek fault zone, which is largely a pre-Quaternary part of the system, may no longer be a significant earthquake hazard. Owing to environmental concerns about ground disturbance, paleoseismic research on the DVFS within DVNP has been mainly of geomorphology, not trenching. Slip rates have been estimated from measured offsets of deposits that are "dated" by regional correlations. However, in 1999 the USGS excavated a trench across the Black Mountains fault zone near Cow Creek, which indicated faulting about 400-700 years ago. Ongoing research using cosmogenic Cl-36 isotopes to date alluvial fans in Death Valley will help place better limits on the current fault slip rates within the Park. Conversely, north of the Park boundary, trenching studies by Reheis and Sawyer on the Fish Lake Valley fault zone have documented late Holocene faulting, high slip rates (ca. 2.5-7 mm/yr), and short recurrence intervals (500-1,500 years). Although the paleoseismic history of the DVFS is still poorly understood, the USGS has calculated that there is a 10% probability of ground motions exceeding 0.5 g (rock sites) in the next 50 years as a result of large (M7) ground-rupturing earthquakes on the DVFS. Like their predecessors, future large earthquakes on the DVFS will cause ground ruptures, as well as strong ground motion, landslides, and liquefaction along the edges of the salt pan. As such, the DVFS threatens permanent NPS and commercial facilities at Furnace Creek (the Ranch, Inn, and Visitors Center), Cow Creek and Grapevine Junction. Although there are only a few hundred permanent residents in the Park, the population may swell to 20,000 during special events. In addition, several other Holocene faults in the Park are sources for large ground-rupturing earthquakes. JF - Abstracts with Programs - Geological Society of America AU - Machette, Michael N AU - Klinger, Ralph E AU - Knott, Jeffrey R AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 457 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - paleoseismicity KW - geologic hazards KW - Black Mountains KW - Death Valley National Park KW - slip rates KW - Fish Lake valley KW - California KW - rupture KW - neotectonics KW - great earthquakes KW - Furnace Creek KW - Death Valley KW - ground motion KW - Furnace Creek fault zone KW - Death Valley Fault KW - tectonics KW - geomorphology KW - active faults KW - earthquakes KW - seismotectonics KW - faults KW - 19:Seismology KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51763115?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+Death+Valley+fault+system%3B+an+unappreciated+seismic+hazard+to+Death+Valley+National+Park&rft.au=Machette%2C+Michael+N%3BKlinger%2C+Ralph+E%3BKnott%2C+Jeffrey+R%3BAnonymous&rft.aulast=Machette&rft.aufirst=Michael&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=457&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - active faults; Black Mountains; California; Death Valley; Death Valley Fault; Death Valley National Park; earthquakes; faults; Fish Lake valley; Furnace Creek; Furnace Creek fault zone; geologic hazards; geomorphology; great earthquakes; ground motion; neotectonics; paleoseismicity; rupture; seismotectonics; slip rates; tectonics; United States ER - TY - JOUR T1 - A geologic map's odyssey AN - 51762239; 2005-009291 AB - Bedrock and surficial geologic maps and supporting information provide the foundation for studies of ecosystems, earth history, groundwater, geomorphology, soils, and environmental hazards such as fire history, landslide and rockfall potential, etc. Geologic maps describe the underlying physical conditions of many natural systems and are an integral component of the physical science inventories stipulated by the National Park Service (NPS) in its Natural Resources Inventory and Monitoring Guideline. The NPS has identified GIS and digital cartographic products as fundamental resource management tools. Digital geologic maps have several advantages over paper geologic maps. Digital geologic maps can be used in a digital GIS environment where they can be integrated with other geospatial data to provide analysis of spatial relationships. A digital GIS provides quick, reproducible, precise analysis results. Digital data are also more easily shared and transferred between users. With digital attribute capability a digital geologic map becomes a powerful database. One of the unresolved issues facing developers of digital geologic maps models is how to include map unit descriptions, supplemental explanatory text (references and map notes), geologic cross sections, and the variety of other printed information that occur on published maps. In short, the digital product must "look and feel" like its published source. In accordance with the NPS Geology-GIS Data Model, the spatial and geologic feature types present (i.e. polygon, line, point and fault, fold, unit, etc.) are captured into appropriate GIS coverages and attributed as per the Data Model. These data are then incorporated into the NPS GIS Theme Manager that facilitates (in ArcView 3.2) the presentation of the various map coverages along with any FGDC metadata and accompanying help files that display map notes, unit descriptions and other ancillary data from the original paper source map. Any map graphics (e.g. geologic cross sections) are scanned from the original paper map and hotlinked to a coverage (e.g. in this case the cross section line coverage) on the digital geologic map. These data are then posted on the PS I&M GIS FTP Website for user access and download. JF - Abstracts with Programs - Geological Society of America AU - O'Meara, Stephanie Annette AU - Thornberry, Trista L AU - Connors, Tim AU - Gregson, Joe D AU - deWolfe, Victor G AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 495 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - models KW - geology KW - geographic information systems KW - U. S. National Park Service KW - government agencies KW - data processing KW - data bases KW - mapping KW - information systems KW - 14:Geologic maps UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51762239?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+of+the+Total+Environment&rft.atitle=Effects+of+surface+run-off+on+the+transport+of+agricultural+chemicals+to+ground+water+in+a+sandplain+setting&rft.au=Delin%2C+G+N%3BLandon%2C+M+K&rft.aulast=Delin&rft.aufirst=G&rft.date=2002-08-05&rft.volume=295&rft.issue=1-3&rft.spage=143&rft.isbn=&rft.btitle=&rft.title=Science+of+the+Total+Environment&rft.issn=00489697&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - data bases; data processing; geographic information systems; geology; government agencies; information systems; mapping; models; U. S. National Park Service ER - TY - JOUR T1 - The National Park Service geologic resources inventory; subtitle; "From paper to digital; a geologic map's odyssey" AN - 51761731; 2005-009062 AB - The role of geology, including bedrock and surficial deposits, active earth processes, fossils, and historical surveys, is often overlooked in park and ecosystem management and interpretation in the National Park System. However, there is a growing awareness that better understanding of earth science is often critical to successful park management. The NPS has identified that a geologic inventory, especially digital geologic maps and reports, is needed for managing, interpreting, and understanding park resources. This paper reviews the goals, preliminary findings, and status of the inventory as well as applications for resource management. Examples include the use of geologic information to construct fire histories, to identify habitat for rare and endangered plant species, and to locate potential hazards. Beginning in 1998, the National Park Service (NPS) initiated a Geologic Resources Inventory (GRI) to document and evaluate the geologic resources of about 272 National Park System units (national parks, monuments, recreational areas, historic sites, seashores, lakeshores, etc.). To date, GRI workshops have been held for 67 parks, geologic bibliographies developed for 235 parks, digital geologic maps produced for 18 parks (numerous more in progress and nearing completion), and geologic reports produced for 13 parks in Utah and Colorado User-friendly (i.e. main users are NPS Natural Resource Managers) GIS tools have been developed in ESRI ArcView format for the digital geologic maps. Applications including the NPS-developed ArcView Theme Manager, graphical cross section viewer and legend text display tools are integrated with a standard geology-GIS model that is in development to reproduce the components of a "paper" geologic map into a digital geologic database. The evolving geology-GIS model is based on the Washington State ArcInfo GIS data model (Harris 1998) that is being adapted for ArcView GIS and extended to include components of the North American Geologic Map Data Model (NADM), http://geology.usgs.gov/dm/. JF - Abstracts with Programs - Geological Society of America AU - Connors, Timothy B AU - Heise, Bruce A AU - Gregson, Joe D AU - O'Meara, Stephanie AU - Thornberry, Trista L AU - Graham, John AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 456 EP - 457 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - processes KW - bedrock KW - ArcView KW - U. S. National Park Service KW - cartography KW - government agencies KW - data processing KW - national parks KW - mapping KW - public lands KW - areal geology KW - evaluation KW - models KW - geology KW - geographic information systems KW - digital cartography KW - natural resources KW - data bases KW - information systems KW - Utah KW - Colorado KW - 14:Geologic maps UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51761731?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+National+Park+Service+geologic+resources+inventory%3B+subtitle%3B+%22From+paper+to+digital%3B+a+geologic+map%27s+odyssey%22&rft.au=Connors%2C+Timothy+B%3BHeise%2C+Bruce+A%3BGregson%2C+Joe+D%3BO%27Meara%2C+Stephanie%3BThornberry%2C+Trista+L%3BGraham%2C+John%3BAnonymous&rft.aulast=Connors&rft.aufirst=Timothy&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=456&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - ArcView; areal geology; bedrock; cartography; Colorado; data bases; data processing; digital cartography; evaluation; geographic information systems; geology; government agencies; information systems; mapping; models; national parks; natural resources; processes; public lands; U. S. National Park Service; United States; Utah ER - TY - JOUR T1 - Crustal-scale structure beneath the northwestern Sacramento Valley interpreted from seismic reflection data; implications for ancestral western California convergent margin tectonics AN - 51756286; 2005-013264 AB - Analysis of a comprehensive suite of 2-D seismic reflection profiles (two strike lines and eight dip lines; total about 270 line-km of data) reveals that the northwestern Sacramento Valley and Coast Range foothills are underlain by a system of blind, west-dipping thrust faults. The thrust faults are rarely imaged as discrete reflectors, but recognized by systematic patterns of dip discordance and truncated reflectors. Structure contours based on interpretation of depth-migrated sections indicate that the blind thrust system is divided into a series of discrete 10- to 20-km-long segments. Homoclinally east-dipping and folded Mesozoic Great Valley Group rocks (marine forearc strata) exposed along the western valley margin define the forelimbs of northeast-vergent fault-propagation folds developed in the hanging walls of the thrusts. Exhumed coherent blueschists of the Franciscan accretionary complex and attenuated remnants of the ophiolitic forearc basement presently exposed in the eastern Coast Ranges are in the hanging wall of the blind thrust system, and have been displaced from their roots in the footwall. Deep, east-dipping reflectors in the footwall of the thrust system are correlative with strongly magnetic rocks (Godfrey et al. 1997), and may be fragments of ophiolitic basement. Restoration of slip on the thrusts suggests that the Coast Range fault, which is the exposed structural contact between the coherent blueschists and attenuated ophiolite, originally dipped east and probably is associated with the east-dipping reflectors in the footwall. Our interpretation of the reflection data supports the two-stage model for blueschist uplift proposed by Wakabayashi and Unruh (1995): (1) blueschist exhumation relative to the forearc basin occurred by attenuation of the ophiolitic basement along the east-dipping Coast Range fault system in late Cretaceous; (2) blueschists, attenuated ophiolite, and forearc strata subsequently were uplifted and folded in the hanging wall of the blind thrust system beginning in latest Cretaceous-early Tertiary, generally coeval with the Laramide orogeny to the east. The blind thrust system probably rooted in, and was antithetic to, the ancestral east-dipping subduction zone beneath California. JF - Abstracts with Programs - Geological Society of America AU - Unruh, Jeffrey R AU - O'Connell, Daniel R H AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 510 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - subduction zones KW - geophysical surveys KW - Cretaceous KW - Sacramento Valley KW - Great Valley Sequence KW - uplifts KW - displacements KW - Upper Cretaceous KW - lower Tertiary KW - Cenozoic KW - California KW - dip KW - folds KW - basins KW - exhumation KW - interpretation KW - faults KW - continental margin KW - seismic profiles KW - hanging wall KW - geophysical methods KW - reflection methods KW - fore-arc basins KW - Laramide Orogeny KW - plate convergence KW - Mesozoic KW - two-dimensional models KW - seismic methods KW - Tertiary KW - Coast Ranges KW - thrust faults KW - surveys KW - geophysical profiles KW - foot wall KW - western California KW - crust KW - 16:Structural geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51756286?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Crustal-scale+structure+beneath+the+northwestern+Sacramento+Valley+interpreted+from+seismic+reflection+data%3B+implications+for+ancestral+western+California+convergent+margin+tectonics&rft.au=Unruh%2C+Jeffrey+R%3BO%27Connell%2C+Daniel+R+H%3BAnonymous&rft.aulast=Unruh&rft.aufirst=Jeffrey&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=510&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - basins; California; Cenozoic; Coast Ranges; continental margin; Cretaceous; crust; dip; displacements; exhumation; faults; folds; foot wall; fore-arc basins; geophysical methods; geophysical profiles; geophysical surveys; Great Valley Sequence; hanging wall; interpretation; Laramide Orogeny; lower Tertiary; Mesozoic; plate convergence; reflection methods; Sacramento Valley; seismic methods; seismic profiles; subduction zones; surveys; Tertiary; thrust faults; two-dimensional models; United States; uplifts; Upper Cretaceous; western California ER - TY - JOUR T1 - Paleontological fieldwork in and around Utah's Grand Staircase-Escalante National Monument; logistical and environmental issues AN - 51747622; 2005-019264 AB - Over the past two years, the Utah Museum of Natural History has conducted several months of fieldwork in the Late Cretaceous Kaiparowits and Wahweap formations of Grand Staircase-Escalante National Monument (GSENM). These efforts, now formalized in a five-year collaborative agreement with GSENM, have allowed us to gain considerable experience working in the remote backcountry in and around the Monument. Conducting paleontological fieldwork in an area as extensive and remote as GSENM presents several logistical challenges. In this largely roadless terrain, fieldwork is constrained by the ability to transport all equipment and supplies to field sites on foot. Excavation equipment is generally limited to easily transported hand tools, thereby limiting excavation techniques and (potentially) access to some specimens. Labor-intensive strategies for transporting heavy jackets using ropes and sleds have been utilized for collecting large vertebrate specimens in remote areas. In addition to extremely limited vehicle access, exposures of the Wahweap and Kaiparowits occur largely within regions designated as Wilderness Study Areas, further complicating the potential for mechanized excavation and hindering transport of specimens and equipment. In spite of these difficulties, recent work has yielded abundant, highly significant, well-preserved fossil vertebrate remains, including new dinosaur taxa. In light of the regulatory and political realities of working in a place like GSNEM, paleontologists must work directly with Monument administrators in developing strategies for conducting surveys and excavations while simultaneously minimizing environmental impact. Highly significant and unique specimens that lie exposed on the surface face serious threats from natural erosion, as well as theft and vandalism. Collaborative efforts by paleontological researchers and monument administration significantly augment our collective ability to locate and preserve globally significant fossil resources before they are lost forever. JF - Abstracts with Programs - Geological Society of America AU - Getty, Mike A AU - Loewen, Mark A AU - Sampson, Scott D AU - Gates, Bucky T A AU - Titus, Alan L AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 539 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Kaiparowits Formation KW - Chordata KW - Cretaceous KW - Wahweap Formation KW - public lands KW - excavations KW - Upper Cretaceous KW - Mesozoic KW - environmental effects KW - Reptilia KW - national monuments KW - Grand Staircase-Escalante National Monument KW - dinosaurs KW - Utah KW - Vertebrata KW - Tetrapoda KW - preservation KW - field studies KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51747622?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Paleontological+fieldwork+in+and+around+Utah%27s+Grand+Staircase-Escalante+National+Monument%3B+logistical+and+environmental+issues&rft.au=Getty%2C+Mike+A%3BLoewen%2C+Mark+A%3BSampson%2C+Scott+D%3BGates%2C+Bucky+T+A%3BTitus%2C+Alan+L%3BAnonymous&rft.aulast=Getty&rft.aufirst=Mike&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Chordata; Cretaceous; dinosaurs; environmental effects; excavations; field studies; Grand Staircase-Escalante National Monument; Kaiparowits Formation; Mesozoic; national monuments; preservation; public lands; Reptilia; Tetrapoda; United States; Upper Cretaceous; Utah; Vertebrata; Wahweap Formation ER - TY - JOUR T1 - The Western Kentucky University graduate program in resource management for national park service scientists AN - 51747306; 2005-019151 AB - An evolving graduate education program formed by cooperation between Western Kentucky University (WKU), the National Park Service (NPS), the National Cave and Karst Research Institute, and the Cave Research Foundation is providing training to a variety of NPS scientists with responsibilities for management of natural resources. The program leads to a Master's of Science degree in Geosciences or Biology. While it initially focused on karst-related water and geologic issues, it is now expanding to include a wider variety of topics, including Geographic Information Systems, environmental planning, and terrestrial ecology. The fundamental key to the program lies in balancing flexibility (from both WKU and NPS) with a high academic standard, in a way that allows resource managers to gain graduate training while keeping their NPS positions. Rather than a standard series of classroom courses, the program offers programs tailored to each student's situation and professional needs, with various combinations of briefer than usual time in residence at WKU (in this program typically two semesters instead of two years), short courses held at various locations around the US, distance courses, and thesis research within NPS park units, typically at the student's home park. Cooperation in research and education between WKU and NPS has a long history that goes back to the WKU Center for Cave and Karst Studies' Mammoth Cave summer "Karst Field Studies" Program, founded by Nick Crawford in 1980 and which continues as an important component of the program today. Simultaneously, since 1990 numerous WKU graduate thesis research projects have been completed at Mammoth Cave National Park in water and air quality, hydrogeology, geomorphology, and ecology. In 1999 we began tailoring graduate programs to NPS employees. Nine NPS employees from Mammoth Cave, Sequoia, Chattahoochee River, and Carlsbad Caverns are currently enrolled in the program, and David Ek, the program's pioneer student, will finish in early 2003. Park thesis research underway includes projects that study hydrologic budgets, water quality, and karst landscape evolution at Mammoth Cave and alpine carbon dioxide budgeting in Sequoia. JF - Abstracts with Programs - Geological Society of America AU - Meiman, Joe AU - Groves, Chris AU - Kerbo, Ronal AU - Chapman Bailey, Zelda AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 521 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - water quality KW - graduate-level education KW - U. S. National Park Service KW - caves KW - government agencies KW - national parks KW - karst KW - education KW - carbon dioxide KW - college-level education KW - geographic information systems KW - National Cave and Karst Research Institute KW - academic institutions KW - Cave Research Foundation KW - Mammoth Cave National Park KW - Mammoth Cave KW - landform evolution KW - water balance KW - public lands KW - history KW - Western Kentucky University KW - Kentucky KW - information systems KW - landscapes KW - solution features KW - Edmonson County Kentucky KW - 23:Geomorphology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51747306?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=The+Western+Kentucky+University+graduate+program+in+resource+management+for+national+park+service+scientists&rft.au=Meiman%2C+Joe%3BGroves%2C+Chris%3BKerbo%2C+Ronal%3BChapman+Bailey%2C+Zelda%3BAnonymous&rft.aulast=Meiman&rft.aufirst=Joe&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=521&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - academic institutions; carbon dioxide; Cave Research Foundation; caves; college-level education; Edmonson County Kentucky; education; geographic information systems; government agencies; graduate-level education; history; information systems; karst; Kentucky; landform evolution; landscapes; Mammoth Cave; Mammoth Cave National Park; National Cave and Karst Research Institute; national parks; public lands; solution features; U. S. National Park Service; United States; water balance; water quality; Western Kentucky University ER - TY - JOUR T1 - Post-fire characterization of the land surface and vegetation using imaging spectroscopy data for Cerro Grande NM and Left Hand Creek WY AN - 51747132; 2005-019342 AB - Historically, fire has been among the dominant disturbances in the Rocky Mountain Region of the U.S. Recent occurrences of large wildfires, due in part to the increased abundance of fuels resulting from the past century of wildfire suppression, necessitate that resource managers acquire information on the post-fire state of the land surface to plan erosion hazard mitigation strategies and to guide re-vegetation efforts. This paper reports on the spectroscopic analysis of remotely sensed data collected post-wildfire. Two areas were studied: 1) the May 2000 Cerro Grande fire in Los Alamos NM, and the Left Hand Creek BLM area in Central Wyoming, which has been subject to wild fires in 2000 and 2001. AVIRIS data collected on September 4, 2000, over the Cerro Grande fire were atmospherically corrected and converted to reflectance using a single ground calibration site. The spectral signatures in these data were examined in relation to known spectral responses of vegetation, mineral and post-fire ash materials. The results in this study area indicate that the presence of ash covered surfaces and bare soil/bedrock surfaces can be identified and mapped. Variations in vegetation absorption features arising from chlorophyll and lignin/cellulose indicate that vegetation within fire perimeters can potentially be discriminated into unburned vegetation, fire-killed non-photosynthetic needles/leaves, and regenerated vegetation. Hymap imaging spectrometer data over the Left Hand Creek study site were collected on July 2, 2002. In conjunction with the remote sensing data collection, field measurements of vegetation reflectance and surveys of plant species composition were made for 33 sites within the study area. Measurements of vegetation cover and species composition were made in order to assess the impact of fire on vegetation regeneration in this sagebrush ecosystem. Ongoing efforts in both study areas seek to utilize the post-fire characterization of the land surface in conjunction with in situ studies of erosion and vegetation regrowth to develop predictive models of landscape recovery from wildland and prescribed fires. JF - Abstracts with Programs - Geological Society of America AU - Morath, Laurie C AU - Kokaly, Raymond F AU - Rockwell, Barnaby AU - Root, Ralph R AU - Goodman, Susan AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 552 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - photosynthesis KW - land cover KW - geophysical surveys KW - geologic hazards KW - erosion KW - characterization KW - mapping KW - ecosystems KW - New Mexico KW - Los Alamos County New Mexico KW - Left Hand Creek KW - vegetation KW - Los Alamos New Mexico KW - fires KW - mitigation KW - infrared methods KW - AVIRIS KW - central Wyoming KW - North America KW - revegetation KW - photochemistry KW - geophysical methods KW - Wyoming KW - ash KW - surveys KW - Cerro Grande fire 2000 KW - spectroscopy KW - reflectance KW - Rocky Mountains KW - remote sensing KW - airborne methods KW - 20:Applied geophysics KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51747132?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Post-fire+characterization+of+the+land+surface+and+vegetation+using+imaging+spectroscopy+data+for+Cerro+Grande+NM+and+Left+Hand+Creek+WY&rft.au=Morath%2C+Laurie+C%3BKokaly%2C+Raymond+F%3BRockwell%2C+Barnaby%3BRoot%2C+Ralph+R%3BGoodman%2C+Susan%3BAnonymous&rft.aulast=Morath&rft.aufirst=Laurie&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=552&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - airborne methods; ash; AVIRIS; central Wyoming; Cerro Grande fire 2000; characterization; ecosystems; erosion; fires; geologic hazards; geophysical methods; geophysical surveys; infrared methods; land cover; Left Hand Creek; Los Alamos County New Mexico; Los Alamos New Mexico; mapping; mitigation; New Mexico; North America; photochemistry; photosynthesis; reflectance; remote sensing; revegetation; Rocky Mountains; spectroscopy; surveys; United States; vegetation; Wyoming ER - TY - JOUR T1 - Bone bed surveys; making use of the data AN - 51747061; 2005-019266 AB - In 1999, the National Park Service approved funding for a 3-year Bone Bed Survey Project within the confines of Badlands National Park (BADL) beginning in the summer of 2000. Funds for this project come from the Natural Resources Preservation Program (NRPP). At the conclusion of the third and final year of the NRPP Bone Bed Survey examination of the lower Scenic Member, Brule Formation, White River Group in BADL, well over 500 new fossil sites have been recorded using GPS information. These data have been converted into a GIS format for use by BADL land managers to focus attention on particularly sensitive areas within Park boundaries, direct law enforcement efforts to these areas, and preservation of specimens coming from the continually eroding sediments. Through this 3-year survey, the collection of numerous vertebrate fossils, associated sediments, and stratigraphic analyses from these localities have provided Park officials with increased information to better understand the depositional characteristics of the areas rich in fossil resources. Plans are currently underway to develop monitoring programs for the richest bone bed locations within the surveyed areas. It is recommended that Badlands National Park continue with these types of surveys as fossil resources are virtually everywhere within its boundaries. Expansion into other stratigraphic levels is also strongly encouraged and recommended. Monitoring programs and law enforcement policies should be strengthened as a method to protect the wealth of fossil resources within the Park. JF - Abstracts with Programs - Geological Society of America AU - Herbel, C L AU - Benton, R C AU - Black, S A AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 539 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Global Positioning System KW - bone beds KW - U. S. National Park Service KW - Natural Resources Preservation Program KW - Brule Formation KW - government agencies KW - Scenic Member KW - Cenozoic KW - sedimentary rocks KW - geographic information systems KW - White River Group KW - sediments KW - protection KW - collecting KW - Chordata KW - monitoring KW - Paleogene KW - Badlands National Park KW - Tertiary KW - natural resources KW - land management KW - surveys KW - information systems KW - fossils KW - Vertebrata KW - South Dakota KW - Oligocene KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51747061?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Bone+bed+surveys%3B+making+use+of+the+data&rft.au=Herbel%2C+C+L%3BBenton%2C+R+C%3BBlack%2C+S+A%3BAnonymous&rft.aulast=Herbel&rft.aufirst=C&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Badlands National Park; bone beds; Brule Formation; Cenozoic; Chordata; collecting; fossils; geographic information systems; Global Positioning System; government agencies; information systems; land management; monitoring; natural resources; Natural Resources Preservation Program; Oligocene; Paleogene; protection; Scenic Member; sedimentary rocks; sediments; South Dakota; surveys; Tertiary; U. S. National Park Service; United States; Vertebrata; White River Group ER - TY - JOUR T1 - Paleontological landscape and timescape management in the National Park Service AN - 51745889; 2005-019262 AB - The National Park Service manages almost 400 parks, monuments, recreation areas and other units, many of which contain both well-known and obscure fossiliferous sections. Until relatively recently, research and collection inside the parks was discouraged and/or perceived as detrimental to the resource. The newer management and research paradigm is to encourage research and ensure that scientifically significant fossils within NPS units are preserved, which in the case of many materials requires collection of specimens and placement into standardized systematic collections. Strata cross fences, of course, and in order to comprehensively focus on entire depositional settings it is necessary for paleontologists to develop projects both within and external to park lands. This serves both to help protect and develop assemblages on other public lands, and places the park into a larger context of processes and events that cannot be observed solely by working inside the legislative boundaries. Thus, the NPS has moved from discouraging paleontological research to expanding efforts both within and external to the parks. In the case of the John Day Basin, for example, partnerships with a wide variety of landholders have increased the effectiveness of biostratigraphic and paleoecologic analysis. Ranges of taxa through time and over geographically distinct paleoecosystems have been enhanced through formulating a basin-wide and temporally broad framework, while still focusing on specific problems of taxonomic, taphonomic and stratigraphic interest. Intervals previously thought to be missing have been found in laterally equivalent strata, and demonstrably isochronous variability in landscapes has been documented. The temporal and local geographic distributions of over 40 mammalian families have been more comprehensively mapped as a result, among them unexpected occurrences of borophagine canids, nimravids, and merycoidodontids. JF - Abstracts with Programs - Geological Society of America AU - Fremd, Theodore AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 539 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - range KW - U. S. National Park Service KW - government agencies KW - national parks KW - mapping KW - biogeography KW - paleontology KW - paleoecology KW - Theria KW - Oregon KW - Fissipeda KW - Merycoidodontidae KW - taphonomy KW - taxonomy KW - Eutheria KW - collections KW - protection KW - collecting KW - Chordata KW - biostratigraphy KW - assemblages KW - John Day Basin KW - Carnivora KW - Mammalia KW - research KW - public lands KW - Canidae KW - Nimravidae KW - land management KW - Vertebrata KW - Tetrapoda KW - preservation KW - 08:General paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51745889?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Paleontological+landscape+and+timescape+management+in+the+National+Park+Service&rft.au=Fremd%2C+Theodore%3BAnonymous&rft.aulast=Fremd&rft.aufirst=Theodore&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - assemblages; biogeography; biostratigraphy; Canidae; Carnivora; Chordata; collecting; collections; Eutheria; Fissipeda; government agencies; John Day Basin; land management; Mammalia; mapping; Merycoidodontidae; national parks; Nimravidae; Oregon; paleoecology; paleontology; preservation; protection; public lands; range; research; taphonomy; taxonomy; Tetrapoda; Theria; U. S. National Park Service; United States; Vertebrata ER - TY - JOUR T1 - Mapping the invasive species leafy spurge (Euphorbia esula) in Theodore Roosevelt National Park using field measurements of vegetation spectra and imaging spectroscopy data AN - 51745612; 2005-019341 AB - The invasive species leafy spurge (Euphorbia esula) is a major resource management challenge in Theodore Roosevelt National Park, North Dakota, USA. Leafy spurge has displaced native vegetation in riparian areas, grasslands, and ridges in the park. This paper reports on the successful application of spectroscopic methods of remote sensing to identify the spectral signature of leafy spurge and map its distribution in images collected by the Compact Airborne Spectrographic Imager (CASI) on June 28, 2000. Field measurements of leafy spurge and native vegetation communities were made using an ASD Full Range field spectrometer. These measurements were convolved to the sampling and bandpass characteristics of the CASI data. The original and convolved spectra reveal that the reflectance signature of leafy spurge can be discriminated from the reflectance signatures of other vegetation in the park. Several methods were applied to atmospherically-corrected CASI data to map leafy spurge, including: 1) direct comparison of field measured vegetation spectra to remotely-sensed CASI spectra using the chlorophyll absorption feature and a feature fitting algorithm; and 2) the spectral angle mapper (SAM) algorithm applied to minimum noise fraction (MNF) bands. Both approaches were successful at detecting leafy spurge in CASI images. These maps of leafy spurge, derived from spectroscopic remote sensing methods, were verified by field surveys and comparison to maps of leafy spurge derived from air photos. The maps derived from CASI indicate that biological control methods using flea beetles (Aphthona nigriscutis and A. lacertosa) have been successful at reducing the aboveground cover of leafy spurge. JF - Abstracts with Programs - Geological Society of America AU - Kokaly, Raymond F AU - Root, Ralph R AU - Brown, Karl AU - Anderson, Gerald L AU - Hager, Steve AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 552 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - imagery KW - geophysical surveys KW - McKenzie County North Dakota KW - passband filters KW - mapping KW - CASI KW - vegetation KW - North Dakota KW - sampling KW - Invertebrata KW - Euphorbia esula KW - Aphthona KW - algorithms KW - Insecta KW - Plantae KW - Compact Airborne Spectrographic Imager KW - pigments KW - Aphthona lacertosa KW - measurement KW - chlorophyll KW - organic compounds KW - riparian environment KW - Arthropoda KW - Mandibulata KW - grasslands KW - surveys KW - Theodore Roosevelt National Park KW - corrections KW - Aphthona nigriscutis KW - remote sensing KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51745612?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mapping+the+invasive+species+leafy+spurge+%28Euphorbia+esula%29+in+Theodore+Roosevelt+National+Park+using+field+measurements+of+vegetation+spectra+and+imaging+spectroscopy+data&rft.au=Kokaly%2C+Raymond+F%3BRoot%2C+Ralph+R%3BBrown%2C+Karl%3BAnderson%2C+Gerald+L%3BHager%2C+Steve%3BAnonymous&rft.aulast=Kokaly&rft.aufirst=Raymond&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=552&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - algorithms; Aphthona; Aphthona lacertosa; Aphthona nigriscutis; Arthropoda; CASI; chlorophyll; Compact Airborne Spectrographic Imager; corrections; Euphorbia esula; geophysical surveys; grasslands; imagery; Insecta; Invertebrata; Mandibulata; mapping; McKenzie County North Dakota; measurement; North Dakota; organic compounds; passband filters; pigments; Plantae; remote sensing; riparian environment; sampling; surveys; Theodore Roosevelt National Park; United States; vegetation ER - TY - JOUR T1 - Emergency salvage collection of fossils at the titanothere bone bed, Badlands National Park AN - 51745295; 2005-019267 AB - Brontotheres (Titanotheres), the first Badlands fossils to be described, are considered the largest and most impressive of the early mammals found in Badlands National Park. In 1999, a park ranger discovered recent illegal diggings at the remote Titanothere Bone Bed Locality within the South Unit at Badlands National Park. Follow-up surveys documented over 18 recent poaching sites within the bone bed. The poachers were never caught. Park staff have created a baseline GIS layer of the site and rangers presently patrol the site at least once a week. Badlands National Park will work cooperatively with the Denver Museum of Nature and Science and the South Dakota School of Mines and Technology on a three-year quarry operation to document and remove the majority of fossil specimens preserved at the Titanothere Bone Bed. The fossils will be prepared and curated at the two cooperating institutions. All information will be entered into the NPS curatorial database, ANCS+. Because the South Unit is part of the Pine Ridge Indian Reservation and managed by the National Park Service through a Memorandum of Agreement with the Oglala Sioux Tribe, negotiations with the tribal council are under way. All specimens eroding at the surface will be mapped using a total station and grid mapping system. The exposed specimens will be carefully collected during the summer field season and prepared and curated during the winter lab season. Screen washing stations will be set up to determine if there are microvertebrates preserved at the site. Test pits will be set up in different portions of the site to determine the total extent of bone. If all of these tasks are completed, the two field teams will open up the Titanothere Bone Bed quarry during the Year 2002 field season. JF - Abstracts with Programs - Geological Society of America AU - Benton, Rachel Carol AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 539 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Titanotheres KW - collecting KW - Chordata KW - bone beds KW - Mammalia KW - data processing KW - mapping KW - Badlands National Park KW - Pine Ridge Indian Reservation KW - sedimentary rocks KW - geographic information systems KW - Brontotheres KW - land management KW - data bases KW - information systems KW - fossils KW - Vertebrata KW - Tetrapoda KW - collections KW - South Dakota KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51745295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Emergency+salvage+collection+of+fossils+at+the+titanothere+bone+bed%2C+Badlands+National+Park&rft.au=Benton%2C+Rachel+Carol%3BAnonymous&rft.aulast=Benton&rft.aufirst=Rachel&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Badlands National Park; bone beds; Brontotheres; Chordata; collecting; collections; data bases; data processing; fossils; geographic information systems; information systems; land management; Mammalia; mapping; Pine Ridge Indian Reservation; sedimentary rocks; South Dakota; Tetrapoda; Titanotheres; United States; Vertebrata ER - TY - JOUR T1 - Paleontology at Scotts Bluff National Monument; a recent paleontological survey of the Orellan White River beds AN - 51745210; 2005-019265 AB - Scotts Bluff National Monument, a 3003-acre unit of the National Park System, is located in the far western portion of the Nebraska panhandle. Scotts Bluff, comprised of claystone and siltstone of the Brule and Gering Formations, rises 800 feet above the North Platte River and was an important landmark along the historic Oregon, California, Mormon Pioneer, and Pony Express trails. The badlands along the North Platte River in what is now Scotts Bluff National Monument are best known as an obstacle to westward migration that caused travelers on the Oregon and California Trails to depart from the river near Scotts Bluff. The Scotts Bluff badlands also contain abundant fossil resources. The lower two-thirds of the bluff is composed of ash and silt-rich claystones of the Orella Member of the Brule Formation, White River Group (33 to 30 Ma). A recent survey of the lowest units of the Orella Member revealed many significant fossils, including multiple tortoises (Stylemys), oredonts (Merycoidodon), "mouse deer" (Leptomeryx), and fossil mammal burrows. Evidence of illegal fossil collecting activity was also discovered and documented. The staff at Scotts Bluff National Monument is currently addressing the fossil resource management and law enforcement issues that have resulted from this survey. JF - Abstracts with Programs - Geological Society of America AU - Foss, Scott E AU - Naylor, Valerie J AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 539 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - Ruminantia KW - Brule Formation KW - Gering Formation KW - erosion features KW - Cenozoic KW - Theria KW - sedimentary rocks KW - Testudinata KW - siltstone KW - White River Group KW - Eutheria KW - Nebraska Panhandle KW - Chordata KW - Scotts Bluff National Monument KW - Leptomeryx KW - Oredontidae KW - Scotts Bluff County Nebraska KW - North Platte River KW - Mammalia KW - Artiodactyla KW - Paleogene KW - Orella Member KW - Merycoidodon KW - Reptilia KW - Cervidae KW - Tertiary KW - claystone KW - land management KW - burrows KW - Vertebrata KW - Stylemys KW - Nebraska KW - clastic rocks KW - badlands KW - Tetrapoda KW - Oligocene KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51745210?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Paleontology+at+Scotts+Bluff+National+Monument%3B+a+recent+paleontological+survey+of+the+Orellan+White+River+beds&rft.au=Foss%2C+Scott+E%3BNaylor%2C+Valerie+J%3BAnonymous&rft.aulast=Foss&rft.aufirst=Scott&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=539&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Artiodactyla; badlands; Brule Formation; burrows; Cenozoic; Cervidae; Chordata; clastic rocks; claystone; erosion features; Eutheria; Gering Formation; land management; Leptomeryx; Mammalia; Merycoidodon; Nebraska; Nebraska Panhandle; North Platte River; Oligocene; Oredontidae; Orella Member; Paleogene; Reptilia; Ruminantia; Scotts Bluff County Nebraska; Scotts Bluff National Monument; sedimentary rocks; siltstone; Stylemys; Tertiary; Testudinata; Tetrapoda; Theria; United States; Vertebrata; White River Group ER - TY - JOUR T1 - Stratigraphic correlation of the early Cenozoic intermontane lacustrine deposits of Wyoming, Colorado, and Utah AN - 51742627; 2005-020375 AB - Compilation of paleomagnetic, biostratigraphic, and geochronologic data from the intermontane lacustrine basins of Wyoming, Colorado, and Utah provide a magneto-biostratigraphic framework for regional stratigraphic correlation. Alternating sequences of well-developed paleosols, alluvial and fluvial mudstone and sandstone deposits (Wasatch, Willwood, Wind River, and Bridger formations), and lacustrine shale and limestone deposits (Green River, Tatman, and Wind River formations) characterize the various intermontane basins. The alternating fluvial and lacustrine sediments preserve a well-documented mammalian succession through the Clarkforkian, Wasatchian, and Bridgerian North American Land Mammal Ages (NALMA) allowing for biostratigraphic correlation between the various basins. JF - Abstracts with Programs - Geological Society of America AU - Kester, Paul R AU - Aase, Arvid K AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 558 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - Wasatchian KW - United States KW - lower Eocene KW - sandstone KW - magnetostratigraphy KW - upper Paleocene KW - Cenozoic KW - sedimentary rocks KW - Clarkforkian KW - Paleocene KW - sediments KW - basins KW - depositional environment KW - Chordata KW - mudstone KW - Eocene KW - biostratigraphy KW - Bridger Formation KW - Mammalia KW - Wasatch Formation KW - paleomagnetism KW - correlation KW - Paleogene KW - Wind River Formation KW - Wyoming KW - Tertiary KW - lower Cenozoic KW - Tatman Formation KW - Bridgerian KW - lacustrine environment KW - Green River Formation KW - intermontane basins KW - Utah KW - Vertebrata KW - Colorado KW - Willwood Formation KW - clastic rocks KW - Tetrapoda KW - lake sediments KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51742627?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Stratigraphic+correlation+of+the+early+Cenozoic+intermontane+lacustrine+deposits+of+Wyoming%2C+Colorado%2C+and+Utah&rft.au=Kester%2C+Paul+R%3BAase%2C+Arvid+K%3BAnonymous&rft.aulast=Kester&rft.aufirst=Paul&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=558&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - basins; biostratigraphy; Bridger Formation; Bridgerian; Cenozoic; Chordata; Clarkforkian; clastic rocks; Colorado; correlation; depositional environment; Eocene; Green River Formation; intermontane basins; lacustrine environment; lake sediments; lower Cenozoic; lower Eocene; magnetostratigraphy; Mammalia; mudstone; Paleocene; Paleogene; paleomagnetism; sandstone; sedimentary rocks; sediments; Tatman Formation; Tertiary; Tetrapoda; United States; upper Paleocene; Utah; Vertebrata; Wasatch Formation; Wasatchian; Willwood Formation; Wind River Formation; Wyoming ER - TY - JOUR T1 - A preliminary inventory and assessment of ichnofossils from the Green River Formation AN - 51742501; 2005-020364 AB - The Green River Formation contains one of the best preserved lacustrine Konservatt-Lagerstatten in the world, revealing extensive information about Eocene fauna, flora, and paleoenvironments. Geologists and paleontologists have studied the Green River Formation and its exceptionally well-preserved fossils for more than a century. Near shore and terrestrial facies of the lake systems yield a wide variety of ichnofossils that significantly contribute to paleoenvironmental and paleoecological interpretations. Although current studies indicate that ichofossils are abundant throughout the formation, only nominal research has been conducted in the past. An inventory and assessment of the ichnofossil resources in the Green River Formation was initiated in 2002 to enhance our understanding of this paleoecosystem. Objectives of the study focused on ichnofossil locality documentation, ichnotaxonomic description, and diversity. A preliminary assessment of their utility for paleoenvironmental interpretations was undertaken, with particular attention to the potential for ichnostratigraphy in the Green River Formation and effectiveness for evaluating paleoenvironmental trends. Ichnofossils in the Green River Formation represent a valuable source of new paleoenvironmental and paleoecological data useful for expanding our knowledge of Eocene bionetworks. Although this study was limited to vertebrate and invertebrate tracks and burrows, data suggests that a broader assessment of other ichnofossil groups is warranted. JF - Abstracts with Programs - Geological Society of America AU - Jennings, Debra S AU - Santucci, Vincent L AU - Buchheim, H Paul AU - Hasiotis, Stephen T AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 556 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - terrestrial environment KW - ichnofossils KW - ecosystems KW - Lagerstatten KW - paleoecology KW - Cenozoic KW - Western U.S. KW - Invertebrata KW - taxonomy KW - interpretation KW - species diversity KW - Chordata KW - Eocene KW - biostratigraphy KW - tracks KW - Paleogene KW - nearshore environment KW - lithofacies KW - Tertiary KW - paleoenvironment KW - lacustrine environment KW - burrows KW - Green River Formation KW - Vertebrata KW - preservation KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51742501?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=A+preliminary+inventory+and+assessment+of+ichnofossils+from+the+Green+River+Formation&rft.au=Jennings%2C+Debra+S%3BSantucci%2C+Vincent+L%3BBuchheim%2C+H+Paul%3BHasiotis%2C+Stephen+T%3BAnonymous&rft.aulast=Jennings&rft.aufirst=Debra&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=556&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - biostratigraphy; burrows; Cenozoic; Chordata; ecosystems; Eocene; Green River Formation; ichnofossils; interpretation; Invertebrata; lacustrine environment; Lagerstatten; lithofacies; nearshore environment; paleoecology; paleoenvironment; Paleogene; preservation; species diversity; taxonomy; terrestrial environment; Tertiary; tracks; United States; Vertebrata; Western U.S. ER - TY - JOUR T1 - Remote sensing for coral reef studies; testing the waters at Biscayne National Park AN - 50273937; 2005-009067 AB - At the northern end of the Florida reef tract lies Biscayne National Park: 95% submerged with 700 km (super 2) of mangrove forest, shallow estuarine bay waters, uninhabited keys, and the country's northernmost coral reefs. The reef tract is famous as a classic field area for Pleistocene and Holocene carbonate studies, and the park itself was the site of some of the earliest studies in airborne remote sensing. One current research project in the park seeks to further develop remote sensing methods appropriate for shallow-bottom areas. The interpretation of radiometric data from submerged, optically shallow environments remains a challenge (especially in complex environments like coral reefs) and a promising new approach is the development of airborne sensors that simultaneously measure georeferenced submerged topography, bottom reflectivity, water-column scattering profiles, and passive upwelling radiance. In support of the development and evaluation of a new airborne sensor designed with coral reef environments in mind, a cooperative field campaign was recently conducted in Biscayne National Park for the purpose of measuring relevant in-water/benthic optical properties and submerged topography simultaneously. In August 2002, high-resolution lidar mapping was undertaken in concert with boat-based acoustic mapping and optical profiling. The lidar surveys were conducted with the Experimental Advanced Airborne Research Lidar, which collected time-synchronized georectified digital camera photography and time-resolved lidar backscatter data. Additional measurements of underwater topography were provided by acoustic fathometer, while in situ water-column measurements were made of absorption, attenuation, backscatter, fluorescence, temperature, and salinity. Benthic and remote-sensing reflectances were measured as well. Additional benthic characterization was provided by acoustic surveys and diver observation. The resulting data set has relevance to other Biscayne studies of reef metabolism and geologic controls on modern reef distribution, and is being applied to current challenges in the remote sensing of submerged habitats (e.g., the "water-column correction problem") and to fundamental National Park Service needs for high-resolution resource mapping and monitoring. JF - Abstracts with Programs - Geological Society of America AU - Clayton, Tonya AU - Brock, John AU - Wright, C Wayne AU - Curry, Richard AU - Boss, Emmanuel AU - Riegl, Bernhard AU - McIntosh, Gregg AU - Dodge, Richard AU - Anonymous Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 457 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 6 SN - 0016-7592, 0016-7592 KW - United States KW - methods KW - upwelling KW - shallow-water environment KW - laser methods KW - geophysical surveys KW - mangrove swamps KW - Dade County Florida KW - reefs KW - characterization KW - mapping KW - Biscayne National Park KW - Holocene KW - Florida KW - Cenozoic KW - acoustical methods KW - topography KW - sedimentary rocks KW - Miami-Dade County Florida KW - estuarine environment KW - Atlantic Coastal Plain KW - high-resolution methods KW - shore features KW - monitoring KW - Quaternary KW - geophysical methods KW - radar methods KW - measurement KW - habitat KW - mires KW - lidar methods KW - swamps KW - surveys KW - Pleistocene KW - wave dispersion KW - carbonate rocks KW - remote sensing KW - 20:Applied geophysics KW - 07:Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/50273937?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Remote+sensing+for+coral+reef+studies%3B+testing+the+waters+at+Biscayne+National+Park&rft.au=Clayton%2C+Tonya%3BBrock%2C+John%3BWright%2C+C+Wayne%3BCurry%2C+Richard%3BBoss%2C+Emmanuel%3BRiegl%2C+Bernhard%3BMcIntosh%2C+Gregg%3BDodge%2C+Richard%3BAnonymous&rft.aulast=Clayton&rft.aufirst=Tonya&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=457&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, 2002 annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2005-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - acoustical methods; Atlantic Coastal Plain; Biscayne National Park; carbonate rocks; Cenozoic; characterization; Dade County Florida; estuarine environment; Florida; geophysical methods; geophysical surveys; habitat; high-resolution methods; Holocene; laser methods; lidar methods; mangrove swamps; mapping; measurement; methods; Miami-Dade County Florida; mires; monitoring; Pleistocene; Quaternary; radar methods; reefs; remote sensing; sedimentary rocks; shallow-water environment; shore features; surveys; swamps; topography; United States; upwelling; wave dispersion ER - TY - JOUR T1 - Geoindicators for river and river-valley monitoring in the humid tropics AN - 20676859; 5468532 AB - Geoindicators for rivers and river valleys in the humid tropics are suggested to indicate environmental change during periods of up to a century. Geoindicators suggested for upland areas of supply are rainfall-runoff relations, rates of soil movement and slope failure, and analyses of drainage density. Data applicable to sediment storage in lowlands are rates of sediment deposition as shown by monuments, short-lived radioisotopes, and pollen. Discharges of water, sediment, and dissolved solids are basic geoindicators for large streams, especially when analyses include flood frequency, stage-discharge relations, flow duration, sediment-rating curves, and comparisons of dissolved loads to sediment loads. The utility of geoindicators in the humid tropics may be greatest if observation sites are selected with a network design to permit comparisons of sites with similar conditions of climate and drainage-basin characteristics. JF - Environmental Geology AU - Osterkamp, W R AD - US Geological Survey, 1675W Anklam Road, Tucson, AZ 85745, USA, wroster@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 725 EP - 735 PB - Springer-Verlag VL - 42 IS - 7 SN - 0943-0105, 0943-0105 KW - Geoindicators KW - Pollution Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Catchment area KW - River Basins KW - Rainfall KW - Climatic changes KW - Indicators KW - Soil erosion KW - Freshwater KW - Streams KW - Soil KW - pollen KW - Stormwater runoff KW - Floods KW - Fluvial sedimentation KW - Humid Areas KW - Geology KW - Suspended load KW - river valleys KW - Rivers KW - Sediment Erosion KW - Environmental monitoring KW - Sediment pollution KW - Rainfall-runoff Relationships KW - Catchment Areas KW - River discharge KW - River basins KW - Valleys KW - Storage KW - Tropical environment KW - Tropical environments KW - environmental changes KW - Radioisotopes KW - Sediment load KW - Slumping KW - Soil Erosion KW - SW 5010:Network design KW - Q2 09264:Sediments and sedimentation KW - P 2000:FRESHWATER POLLUTION KW - Q5 08502:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20676859?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Geology&rft.atitle=Geoindicators+for+river+and+river-valley+monitoring+in+the+humid+tropics&rft.au=Osterkamp%2C+W+R&rft.aulast=Osterkamp&rft.aufirst=W&rft.date=2002-10-01&rft.volume=42&rft.issue=7&rft.spage=725&rft.isbn=&rft.btitle=&rft.title=Environmental+Geology&rft.issn=09430105&rft_id=info:doi/10.1007%2Fs00254-002-0550-y LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-02-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Environmental monitoring; Catchment area; Stormwater runoff; Fluvial sedimentation; Tropical environment; Climatic changes; River discharge; Suspended load; River basins; Slumping; Sediment load; Soil erosion; Storage; Soil; Sediment pollution; pollen; Floods; Rainfall; Tropical environments; Radioisotopes; environmental changes; river valleys; Streams; Sediment Erosion; Rivers; River Basins; Rainfall-runoff Relationships; Catchment Areas; Humid Areas; Indicators; Geology; Soil Erosion; Valleys; Freshwater DO - http://dx.doi.org/10.1007/s00254-002-0550-y ER - TY - JOUR T1 - Variation In Foraging Behavior And Body Mass In Broods Of Emperor Geese (Chen Canagica): Evidence For Interspecific Density Dependence AN - 18663463; 5560739 AB - Broods of geese spend time feeding according to availability and quality of food plants, subject to inherent foraging and digestive constraints. We studied behavioral patterns of broods of Emperor Geese (Chen canagica) on the Yukon-Kuskokwim Delta, Alaska, and examined how feeding and alert behavior varied in relation to habitat and goose density. During 1994-1996, time spent feeding by Emperor Goose goslings and adult females was positively related to multispecies goose densities near observation blinds, and not to just Emperor Goose density. Similarly, body mass of Emperor Goose goslings was more strongly related (negatively) to multispecies goose densities than intraspecific densities. A grazing experiment in 1995 indicated that most above ground primary production by Carex subspathacea, a preferred food plant, was consumed by grazing geese. Those results demonstrate that interspecific competition for food occurred, with greatest support for goslings whose behavioral repertoire is limited primarily to feeding, digesting, and resting. Although the more abundant Cackling Canada Geese (Branta canadensis minima) differed from Emperor Geese in their preferred use of habitats during brooding rearing, the two species occurred in equal abundance in habitats preferred by Emperor Goose broods. Thus, Cackling Canada Geese were a numerically significant competitor with Emperor Geese. Comparing these results to an earlier study, time spent feeding by goslings, adult females, and adult males were greater during 1993-1996 than during 1985-1986. During the interval between those studies, densities of Cackling Canada Geese increased two to three times whereas Emperor Goose numbers remained approximately stable, which implies that interspecific competition affected foraging behavior over a long time period. These density-dependent changes in foraging behavior and body mass indicate that interspecific competition affects nutrient acquisition and gosling growth, which has a demonstrated effect on juvenile survival of Emperor Geese. Management of Emperor Geese should consider interspecific relations and densities of all goose species occurring on the Yukon-Kuskokwim Delta, Alaska.Original Abstract: El tiempo que las crias de gansos utilizan para alimentarse depende de la disponibilidad y calidad de las plantas de las cuales se alimentan, y esta sujeto a las restricciones inherentes del forrajeo y la digestion. Estudiamos los patrones conductuales de crias de Chen canagica en el Delta Yukon-Kuskokwim, Alaska, y examinamos como la conducta de alimentacion y de alerta variaron con respecto al habitat y densidad de gansos. Durante 1994-1996, el tiempo que los gansos juveniles y las hembras adultas gastaron en la alimentacion, se relaciono positivamente con las densidad de gansos de multiples especies que se encontraban cerca de los puestos de observacion, y no solo con las densidades de C. canagica. Similarmente, el peso corporal de los juveniles de C. canagica estuvo mas relacionado (negativamente) con las densidades de gansos de multiples especies que con las densidades intraespecificas. Un experimento de pastoreo en 1995 indico que la mayoria de la produccion primaria de Carex subspathacea existente por sobre el suelo, una planta preferida como alimento, fue consumida por los gansos que pastoreaban. Estos resultados demuestran que ocurrio competencia interespecifica por el alimento, lo que fue mejor apoyado por las conductas de los gansos juveniles cuyo repertorio conductual esta principalmente limitado a alimentarse, digerir y descansar. Aunque el ganso Branta canadensis minima (mas abundante) difirio de C. canagica en las preferencias de uso de habitats durante el periodo de cria , las dos especies ocurrieron en la misma abundancia en los habitats preferidos por las crias de C. canagica. Asi, B. canadensis minima fue un competidor numericamente significativo para C. canagica. Comparando nuestros resultados con los de un estudio anterior, el tiempo invertido en la alimentacion por los juveniles, hembras adultas y machos adultos fue mayor durante 1993-1996 que durante 1985-1986. Durante el intervalo de tiempo entre estos estudios, las densidades de B. canadensis minimos aumentaron dos a tres veces mientras que los numeros de C. canagica permanecieron aproximadamente estables, lo que implica que la competencia interespecifica afecto la conducta de forrajeo por un largo periodo de tiempo. Estos cambios denso-dependientes en la conducta de forrajeo y peso corporal indican que la competencia interespecifica afecta la adquisicion de nutrientes y el crecimiento de los juveniles, lo que tiene un efecto demostrado en la supervivencia de juveniles de C. canagica. El manejo de los gansos C. canagica debe considerar las relaciones interespecificas y densidades de todas las especies de gansos que ocurren en el Delta Yukon-Kuskokwim, Alaska. JF - Auk AU - Schmutz, JA AU - Laing, K K AD - U.S. Geological Survey, Alaska Biological Science Center, 1011 East Tudor Road, Anchorage, Alaska 99503, USA, joel_schmutz@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 996 EP - 1009 PB - The American Ornithologists Union VL - 119 IS - 4 SN - 0004-8038, 0004-8038 KW - Anser canagicus KW - Cackling Canada goose KW - Emperor goose KW - Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; Animal Behavior Abstracts; Ecology Abstracts KW - Density dependence KW - Population density KW - INE, USA, Alaska, Yukon Delta KW - Habitat selection KW - Environmental factors KW - Migratory species KW - Interspecific relationships KW - INE, USA, Alaska, Kuskokwim Delta KW - Branta canadensis minima KW - Body size KW - Habitat utilization KW - Competition KW - Growth rate KW - Marine KW - Juveniles KW - Foraging behavior KW - Brackish KW - Foraging behaviour KW - Breeding sites KW - Chen canagica KW - Aquatic birds KW - Breeding success KW - O 1070:Ecology/Community Studies KW - D 04671:Birds KW - Y 25496:Birds KW - Q1 08423:Behaviour UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18663463?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Auk&rft.atitle=Variation+In+Foraging+Behavior+And+Body+Mass+In+Broods+Of+Emperor+Geese+%28Chen+Canagica%29%3A+Evidence+For+Interspecific+Density+Dependence&rft.au=Schmutz%2C+JA%3BLaing%2C+K+K&rft.aulast=Schmutz&rft.aufirst=JA&rft.date=2002-10-01&rft.volume=119&rft.issue=4&rft.spage=996&rft.isbn=&rft.btitle=&rft.title=Auk&rft.issn=00048038&rft_id=info:doi/10.1043%2F0004-8038%282002%29119%280996%3AVIFBAB%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Growth rate; Juveniles; Foraging behaviour; Breeding sites; Interspecific relationships; Migratory species; Density dependence; Body size; Habitat selection; Competition; Aquatic birds; Breeding success; Foraging behavior; Population density; Habitat utilization; Environmental factors; Branta canadensis minima; Chen canagica; INE, USA, Alaska, Kuskokwim Delta; INE, USA, Alaska, Yukon Delta; Marine; Brackish DO - http://dx.doi.org/10.1043/0004-8038(2002)119(0996:VIFBAB)2.0.CO;2 ER - TY - JOUR T1 - Survey of aquatic macroinvertebrates and amphibians at Wupatki National Monument, Arizona, USA: An evaluation of selected factors affecting species richness in ephemeral pools AN - 18630477; 5540755 AB - Ephemeral aquatic habitats in Wupatki National Monument vary from naturally formed pools in arroyos over 5000 years old, to constructed catchment basins with ages estimated at 60-1000+ years old, and borrow pits and stock ponds 30-60 years old. The different ages of these pools provide different histories of colonization by amphibians and aquatic invertebrates, especially temporary pool specialists such as spadefoot toads and branchiopod crustaceans. Ten pools of five different origins and ages were surveyed in August and/or September 1997 for aquatic organisms; a total of 13 surveys were conducted. Twenty-two taxa were found, with the number of species in a pool during any survey ranging from one to 10. Species composition of the communities changed from one sampling date to the next within individual pools. Community structure is an amalgam of species with different dispersal mechanisms that are influenced by different pool characteristics. Age appears to have little effect overall, but may have influenced branchiopod presence /absence. Distance to permanent water, frequency of disturbance, and current pool size were correlated with presence/absence of some species. JF - Hydrobiologia AU - Graham, T B AD - U.S. Geological Survey, Canyonlands Field Station, 2290 S. West Resources Blvd, Moab, UT 84532, U.S.A., tim_graham@usgs.gov Y1 - 2002/10// PY - 2002 DA - Oct 2002 SP - 215 EP - 224 PB - Kluwer Academic Publishers VL - 486 IS - 1 SN - 0018-8158, 0018-8158 KW - Amphibians KW - ASFA 1: Biological Sciences & Living Resources; Entomology Abstracts; Ecology Abstracts KW - USA, Arizona, Wupatki Natl. Monument KW - Amphibiotic species KW - Temporary ponds KW - Pools KW - Freshwater KW - Amphibia KW - Community composition KW - Species diversity KW - USA, Arizona KW - Invertebrata KW - Freshwater organisms KW - Population structure KW - Zoobenthos KW - Sanctuaries KW - D 04310:Freshwater KW - Q1 08441:Population structure KW - Z 05210:Aquatic entomology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18630477?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrobiologia&rft.atitle=Survey+of+aquatic+macroinvertebrates+and+amphibians+at+Wupatki+National+Monument%2C+Arizona%2C+USA%3A+An+evaluation+of+selected+factors+affecting+species+richness+in+ephemeral+pools&rft.au=Graham%2C+T+B&rft.aulast=Graham&rft.aufirst=T&rft.date=2002-10-01&rft.volume=486&rft.issue=1&rft.spage=215&rft.isbn=&rft.btitle=&rft.title=Hydrobiologia&rft.issn=00188158&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Community composition; Amphibiotic species; Temporary ponds; Species diversity; Population structure; Freshwater organisms; Zoobenthos; Sanctuaries; Pools; Amphibia; Invertebrata; USA, Arizona, Wupatki Natl. Monument; USA, Arizona; Freshwater ER - TY - JOUR T1 - A hierarchical analysis of population change with application to Cerulean Warblers AN - 18622158; 5525132 AB - Estimation of population change from count surveys is complicated by variation in quality of information among sample units, by the need for covariates to accommodate factors that influence detectability of animals, and by multiple geographic scales of interest. We present a hierarchical model for estimation of population change from the North American Breeding Bird Survey. Hierarchical models, in which population parameters at different geographic scales are viewed as random variables, provide a convenient framework for summary of population change among regions, accommodating regional variation in survey quality and a variety of distributional assumptions about observer effects and other nuisance parameters. Markov chain Monte Carlo methods provide a convenient means for fitting these models and also allow for construction of estimates of derived variables such as weighted regional trends and composite yearly population indices. We construct an overdispersed Poisson regression model for estimation of trend and year effects for Cerulean Warblers (Dendroica cerulea), accommodating nuisance covariates for observer and start-up effects, and estimating abundance- and area-weighted annual indices at regional and continent-wide geographic scales. A goodness-of-fit test is also presented for the model. Cerulean Warblers declined at a rate of 3.04% per year over the interval 1966-2000. JF - Ecology AU - Link, WA AU - Sauer, J R AD - USGS Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, Maryland 20708-4017, USA Y1 - 2002/10// PY - 2002 DA - Oct 2002 SP - 2832 EP - 2840 PB - Ecological Society of America VL - 83 IS - 10 SN - 0012-9658, 0012-9658 KW - Cerulean warbler KW - detectability KW - Ecology Abstracts KW - D 04671:Birds KW - D 04001:Methodology - general UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18622158?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecology&rft.atitle=A+hierarchical+analysis+of+population+change+with+application+to+Cerulean+Warblers&rft.au=Link%2C+WA%3BSauer%2C+J+R&rft.aulast=Link&rft.aufirst=WA&rft.date=2002-10-01&rft.volume=83&rft.issue=10&rft.spage=2832&rft.isbn=&rft.btitle=&rft.title=Ecology&rft.issn=00129658&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Necropsy findings in sea turtles taken as bycatch in the North Pacific longline fishery AN - 18621451; 5523977 AB - Concern about interactions between fisheries and marine turtles has increased in recent years, particularly since East Pacific leatherback turtles (Dermochelys coriacea) may become extinct (Spotila et al., 2000). However, relatively little published information exists on interactions between sea turtles and North Pacific longline fisheries. The most available literature on the topic focuses on modeling data from fisheries observers for estimating the probability of animals dying and fishery-induced mortality (McCracken; Kleiber). A more recent study was undertaken with satellite telemetry and remote sensing to evaluate the probability of interaction between longline fisheries and loggerhead sea turtles (Caretta caretta) and the effects of hooking (Polovina et al., 2000; Parker, in press). JF - Fishery Bulletin AU - Work, T M AU - Balazs, G H AD - Hawaii Field Station, National Wildlife Health Center, U.S. Geological Survey, 300 Ala Moana Blvd., Room 5-231, Honolulu, Hawaii 96850, USA, thierry_work@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 876 EP - 880 VL - 100 IS - 4 SN - 0090-0656, 0090-0656 KW - Leatherback KW - Leatherback sea turtle KW - Loggerhead KW - Loggerhead sea turtle KW - Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources KW - Marine KW - By catch KW - Pelagic fisheries KW - Aquatic reptiles KW - Longlining KW - Nature conservation KW - Caretta caretta KW - Rare species KW - Dermochelys coriacea KW - I, North Pacific KW - Mortality causes KW - Q5 08523:Conservation, wildlife management and recreation KW - O 5020:Fisheries and Fishery Biology KW - Q1 08604:Stock assessment and management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18621451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BHerriges%2C+Jim%3BMacleod%2C+Robb&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Steese-White+Mountains+earth+cover+classification&rft.title=Steese-White+Mountains+earth+cover+classification&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - By catch; Pelagic fisheries; Longlining; Aquatic reptiles; Nature conservation; Rare species; Mortality causes; Caretta caretta; Dermochelys coriacea; I, North Pacific; Marine ER - TY - JOUR T1 - Predation on exotic zebra mussels by native fishes: effects on predator and prey AN - 18502285; 5464360 AB - Exotic zebra mussels, Dreissena polymorpha, occur in southern U.S. waterways in high densities, but little is known about the interaction between native fish predators and zebra mussels. Previous studies have suggested that exotic zebra mussels are low profitability prey items and native vertebrate predators are unlikely to reduce zebra mussel densities. We tested these hypotheses by observing prey use of fishes, determining energy content of primary prey species of fishes, and conducting predator exclusion experiments in Lake Dardanelle, Arkansas.Zebra mussels were the primary prey eaten by 52.9% of blue catfish, Ictalurus furcatus; 48.2% of freshwater drum, Aplodinotus grunniens; and 100% of adult redear sunfish, Lepomis microlophus. Blue catfish showed distinct seasonal prey shifts, feeding on zebra mussels in summer and shad, Dorosoma spp., during winter. Energy content (joules g super(-1)) of blue catfish prey (threadfin shad, Dorosoma petenense; gizzard shad, D. cepedianum; zebra mussels; and asiatic clams, Corbicula fluminea) showed a significant species by season interaction, but shad were always significantly greater in energy content than bivalves examined as either ash-free dry mass or whole organism dry mass. Fish predators significantly reduced densities of large zebra mussels (>5 mm length) colonising clay tiles in the summers of 1997 and 1998, but predation effects on small zebra mussels ( less than or equal to 5 mm length) were less clear.Freshwater drum and redear sunfish process bivalve prey by crushing shells and obtain low amounts of higher-energy food (only the flesh), whereas blue catfish lack a shell-crushing apparatus and ingest large amounts of low-energy food per unit time (bivalves with their shells). Blue catfish appeared to select the abundant zebra mussel over the more energetically rich shad during summer, then shifted to shad during winter when shad experienced temperature-dependent stress and mortality. Native fish predators can suppress adult zebra mussel colonisation, but are ultimately unlikely to limit population density because of zebra mussel reproductive potential. JF - Freshwater Biology AU - Magoulick, D D AU - Lewis, L C AD - U.S.G.S., Arkansas Cooperative Fish and Wildlife Research Unit, Department of Biological Sciences, University of Arkansas, Fayetteville, AR, U.S.A., danmag@uark.edu Y1 - 2002/10// PY - 2002 DA - Oct 2002 SP - 1908 EP - 1918 PB - Blackwell Science Ltd VL - 47 IS - 10 SN - 0046-5070, 0046-5070 KW - Zebra mussel KW - Ecology Abstracts KW - D 04658:Molluscs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18502285?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Freshwater+Biology&rft.atitle=Predation+on+exotic+zebra+mussels+by+native+fishes%3A+effects+on+predator+and+prey&rft.au=Magoulick%2C+D+D%3BLewis%2C+L+C&rft.aulast=Magoulick&rft.aufirst=D&rft.date=2002-10-01&rft.volume=47&rft.issue=10&rft.spage=1908&rft.isbn=&rft.btitle=&rft.title=Freshwater+Biology&rft.issn=00465070&rft_id=info:doi/10.1046%2Fj.1365-2427.2002.00940.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1046/j.1365-2427.2002.00940.x ER - TY - JOUR T1 - Metal Concentrations in Zebra Mussels and Sediments from Embayments and Riverine Environments of Eastern Lake Erie, Southern Lake Ontario, and the Niagara River AN - 16188944; 5994519 AB - Concentrations of 14 metals were studied in the soft tissues of zebra mussels (Dreissena polymorpha) and sediments from 16 Great Lakes embayments and riverine environments. Samples were collected in 1993 and 1994 during the early and late autumn period when the body mass of mussels is least affected by reproductive activities. There was a significant difference in geometric mean concentrations of all metals except Cu in mussels sampled from different sites, and there was a significant difference in the geometric mean concentrations of all metals but Cd, Mn, and Zn between years. The higher metal concentrations in mussels from this study were generally similar to those in mussels from contaminated European and U.S. locations, and those with lower concentrations were similar to those from uncontaminated European and U.S. locations. Geometric mean sediment concentrations of all metals differed significantly among sites. Sediment concentrations of metals from some sites were above EPA guidelines for moderately polluted harbor sediments. Sites where zebra mussels had higher concentrations of Al, Cr, and V tended to be the same sites as those where sediment concentrations of these metals were also higher. However, there was not a significant statistical relationship between concentrations of metals in zebra mussels and sediments, except for Mg. JF - Archives of Environmental Contamination and Toxicology AU - Lowe, T P AU - Day, D D AD - USGS Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, Maryland 20708-4017, USA Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 301 EP - 308 VL - 43 IS - 3 SN - 0090-4341, 0090-4341 KW - Zebra mussel KW - Aqualine Abstracts; Pollution Abstracts; ASFA 1: Biological Sciences & Living Resources; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Toxicology Abstracts KW - Tissues KW - Heavy metals KW - Europe KW - Freshwater KW - Lakes KW - Ecotoxicology KW - Exotic Species KW - Sediment Contamination KW - Cadmium KW - Manganese KW - Toxicology KW - Freshwater pollution KW - Bays KW - Rivers KW - Metals KW - Mussels KW - Metal Concentration KW - Freshwater molluscs KW - Canada KW - Standards KW - North America, Ontario L. KW - Fluvial Sediments KW - Body mass KW - Statistical analysis KW - North America, Erie L. KW - Zinc KW - Canada, Ontario, Niagara R. KW - North America, Niagara R. KW - Sediment Concentration KW - Dreissena polymorpha KW - Sediment pollution KW - Pollution detection KW - Zebra Mussels KW - Harbours KW - Sediments KW - Canada, Ontario, Erie L. KW - USA KW - Bioaccumulation KW - North America, Great Lakes KW - Soft tissues KW - Histochemistry KW - P 2000:FRESHWATER POLLUTION KW - X 24166:Environmental impact KW - Q5 08504:Effects on organisms KW - SW 3030:Effects of pollution KW - AQ 00008:Effects of Pollution KW - Q1 08542:Prevention and control UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16188944?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Archives+of+Environmental+Contamination+and+Toxicology&rft.atitle=Metal+Concentrations+in+Zebra+Mussels+and+Sediments+from+Embayments+and+Riverine+Environments+of+Eastern+Lake+Erie%2C+Southern+Lake+Ontario%2C+and+the+Niagara+River&rft.au=Lowe%2C+T+P%3BDay%2C+D+D&rft.aulast=Lowe&rft.aufirst=T&rft.date=2002-10-01&rft.volume=43&rft.issue=3&rft.spage=301&rft.isbn=&rft.btitle=&rft.title=Archives+of+Environmental+Contamination+and+Toxicology&rft.issn=00904341&rft_id=info:doi/10.1007%2Fs00244-002-1176-5 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-12-01 N1 - Last updated - 2016-09-29 N1 - SubjectsTermNotLitGenreText - Rivers; Sediment pollution; Pollution detection; Heavy metals; Harbours; Sediments; Metal Concentration; Freshwater molluscs; Lakes; Bioaccumulation; Ecotoxicology; Histochemistry; Toxicology; Bays; Freshwater pollution; Metals; Body mass; Zinc; Statistical analysis; Manganese; Soft tissues; Tissues; Exotic Species; Mussels; Fluvial Sediments; Sediment Contamination; Cadmium; Standards; Zebra Mussels; Sediment Concentration; Dreissena polymorpha; Canada, Ontario, Erie L.; USA; Canada; North America, Great Lakes; Canada, Ontario, Niagara R.; Europe; North America, Ontario L.; North America, Niagara R.; North America, Erie L.; Freshwater DO - http://dx.doi.org/10.1007/s00244-002-1176-5 ER - TY - JOUR T1 - TBA Biodegradation in Surface-Water Sediments under Aerobic and Anaerobic Conditions AN - 16143565; 5533607 AB - The potential for [U- super(14)C] TBA biodegradation was examined in laboratory microcosms under a range of terminal electron accepting conditions. TBA mineralization to CO sub(2) was substantial in surface-water sediments under oxic, denitrifying, or Mn(IV)-reducing conditions and statistically significant but low under SO sub(4)-reducing conditions. Thus, anaerobic TBA biodegradation may be a significant natural attenuation mechanism for TBA in the environment, and stimulation of in situ TBA bioremediation by addition of suitable terminal electron acceptors may be feasible. No degradation of [U- super(14)C] TBA was observed under methanogenic or Fe(III)-reducing conditions. JF - Environmental Science & Technology AU - Bradley, P M AU - Landmeyer, JE AU - Chapelle, F H AD - U.S. Geological Survey, 720 Gracern Rd, Suite 129, Columbia, South Carolina 29210-7651, USA, pbradley@usgs.gov Y1 - 2002/10/01/ PY - 2002 DA - 2002 Oct 01 SP - 4087 EP - 4090 VL - 36 IS - 19 SN - 0013-936X, 0013-936X KW - Tertbutyl alcohol KW - tert-Butyl alcohol KW - tert-butyl alcohol KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Biotechnology and Bioengineering Abstracts; Bioengineering Abstracts; Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Aqualine Abstracts; Water Resources Abstracts KW - Biodegradation KW - Aerobic conditions KW - Bioremediation KW - Surface water KW - Sediment KW - Groundwater Pollution KW - Mineralization KW - Water analysis KW - Feasibility Studies KW - Tert-butyl alcohol KW - Anaerobic Biodegradation KW - Microcosms KW - Freshwater pollution KW - Experimental Data KW - Oxic conditions KW - Anaerobically KW - Fate of Pollutants KW - Anaerobic conditions KW - Sediments KW - Fate KW - Biodegradation (see also Biological oxidation) KW - Sediment-water interface KW - Anoxic conditions KW - Alcohols KW - Surface water (see also Lakes, Ponds, Streams) KW - Aerobic Biodegradation KW - Mineralization (see also Biodegradation) KW - Chemical pollutants KW - Carbon dioxide KW - Q5 08503:Characteristics, behavior and fate KW - P 9000:ENVIRONMENTAL ACTION KW - SW 3070:Water quality control KW - SW 3020:Sources and fate of pollution KW - A 01016:Microbial degradation KW - AQ 00002:Water Quality KW - W 30965:Miscellaneous, Reviews KW - W4 210:Bioremediation, Bioreactors & BioCycling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16143565?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BSondergaard%2C+Mike%3BMacleod%2C+Robb&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Tiekel+earth+cover+classification&rft.title=Tiekel+earth+cover+classification&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-11-01 N1 - Last updated - 2015-10-28 N1 - SubjectsTermNotLitGenreText - Oxic conditions; Sediment-water interface; Anoxic conditions; Bioremediation; Alcohols; Microcosms; Carbon dioxide; Mineralization; Chemical pollutants; Fate; Freshwater pollution; Aerobic conditions; Biodegradation; Surface water; Anaerobic conditions; Water analysis; Sediments; Biodegradation (see also Biological oxidation); Anaerobically; Tert-butyl alcohol; Surface water (see also Lakes, Ponds, Streams); Mineralization (see also Biodegradation); Sediment; Experimental Data; Feasibility Studies; Fate of Pollutants; Anaerobic Biodegradation; Aerobic Biodegradation; Groundwater Pollution DO - http://dx.doi.org/10.1021/es011480c ER - TY - JOUR T1 - Coastal geoindicators of environmental change in the humid tropics AN - 16142815; 5468531 AB - The primary geoindicators appropriate for monitoring environmental changes in the humid tropics are transitory surface water levels, shoreline position, wetlands distribution, coral reefs, landforms, and sediment sequence and composition. Lateral zonations and temporal successions of vegetation also can be used as geoindicators of riverine and shoreline changes. All of these coastal geoindicators are sensitive to regional tectonic processes and anthropogenic alterations and they typically reflect significant changes in coastal conditions such as fluvial processes, coastal energy, water quality, relative sea level, and sediment supply. Where humid tropical coasts coincide with active tectonic margins, indicators of seismic activity are critical to understanding coastal changes associated with co-seismic subsidence or uplift, tsunamis, and liquefaction of coastal sediments. Coastal landforms and sedimentary deposits that record late Quaternary environmental changes include perched fluvial and marine terraces, delta-plain morphologies, crevasse-splay deposits, peats and other paleosols, beach ridges, mud capes, and mud volcanoes. Although these features and deposits typically reflect environmental changes spanning more than 100 years, they are relevant to modern processes, management of coastal lands and resources, and prediction of future conditions. In some regions of the humid tropics, large coastal areas are unaffected by hurricanes or typhoons. Nevertheless, these tropical coasts are vulnerable to other non-storm processes, such as El Nino events, tsunamis, and monsoons that increase water levels, and cause widespread flooding and beach erosion. The environmental and political significance of coastal geoindicators increases when they are integrated and applied to issues of human safety and health such as hazards mapping, risk assessment, and dispersion of contaminated sediments. However, to be relevant, those socio-environmental applications demand accurate predictions of future trends and rates of change. JF - Environmental Geology AU - Morton, R A AD - US Geological Survey, Center for Coastal Geology and Regional Marine Studies, 600 Fourth Street South, St. Petersburg, FL 33701, USA, rmorton@usgs.gov Y1 - 2002/10// PY - 2002 DA - October 2002 SP - 711 EP - 724 PB - Springer-Verlag VL - 42 IS - 7 SN - 0943-0105, 0943-0105 KW - socio-environmental applications KW - Pollution Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Sea surface KW - Sea level KW - Environmental Quality KW - Coastal Waters KW - Climatic changes KW - Pollution dispersion KW - Indicators KW - Anthropogenic factors KW - IS, Tropical Pacific KW - Sea Level KW - Hazards KW - El Nino KW - Coastal morphology KW - Humid Areas KW - Wetlands KW - Geology KW - Tsunamis KW - Weather forecasting KW - Teleconnections KW - El Nino phenomena KW - Environmental monitoring KW - Marine KW - Sediment pollution KW - Coastal waters KW - AS, Tropical Atlantic KW - Surface temperature KW - Southern Oscillation KW - Erosion KW - Coastal zone KW - Coastal landforms KW - Salt marshes KW - ISW, Tropical Indian Ocean KW - Geologic History KW - Tropical environment KW - Coral reefs KW - Tropical environments KW - Flooding KW - Temperature anomalies KW - Environmental quality KW - Health and safety KW - Monitoring KW - Tectonics KW - Monsoons KW - O 4095:Instruments/Methods KW - SW 5010:Network design KW - Q2 09241:General KW - P 1000:MARINE POLLUTION KW - Q5 08502:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16142815?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Geology&rft.atitle=Coastal+geoindicators+of+environmental+change+in+the+humid+tropics&rft.au=Morton%2C+R+A&rft.aulast=Morton&rft.aufirst=R&rft.date=2002-10-01&rft.volume=42&rft.issue=7&rft.spage=711&rft.isbn=&rft.btitle=&rft.title=Environmental+Geology&rft.issn=09430105&rft_id=info:doi/10.1007%2Fs00254-002-0549-4 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-05-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Sea surface; Sea level; Pollution dispersion; Climatic changes; Anthropogenic factors; Indicators; Hazards; Coastal morphology; Tsunamis; Weather forecasting; El Nino phenomena; Teleconnections; Environmental monitoring; Sediment pollution; Southern Oscillation; Surface temperature; Coastal zone; Coastal landforms; Salt marshes; Coral reefs; Tropical environment; Temperature anomalies; Health and safety; Tectonics; Monsoons; Erosion; El Nino; Tropical environments; Flooding; Environmental quality; Geology; Coastal waters; Sea Level; Coastal Waters; Geologic History; Environmental Quality; Humid Areas; Wetlands; Monitoring; ISW, Tropical Indian Ocean; IS, Tropical Pacific; AS, Tropical Atlantic; Marine DO - http://dx.doi.org/10.1007/s00254-002-0549-4 ER - TY - JOUR T1 - Toxicity of selenium and other elements in food organisms to razorback sucker larvae. AN - 71927358; 12127741 AB - Elevated selenium concentrations documented in water, sediment, and biota in irrigation drain water studies by U.S. Department of the Interior agencies and academia have raised concerns that selenium may be adversely affecting endangered fish in the upper Colorado River basin. The objective of the study was to determine the effects on endangered razorback sucker (Xyrauchen texanus) larvae from exposure to selenium and other trace elements in water and zooplankton collected from sites adjacent to the Colorado River near Grand Junction, CO. A 30-day study was initiated with 5-day-old larvae exposed in a 4 x 4 factor experiment with four food and four water treatments, and the biological endpoints measured were survival, growth, development, and whole-body residues of selenium. Mean selenium concentration in reference water (24-Road) was or=4.6 microg/g in food organisms adversely affected the survival of razorback sucker larvae. The onset of mortality in larvae exposed to food and water from Walter Walker seemed delayed compared to mortality in larvae exposed to food and water from Horsethief, which has been observed in two other studies. Elevated arsenic in one food source seemed to interact with selenium to reduce the toxic effects of selenium. JF - Aquatic toxicology (Amsterdam, Netherlands) AU - Hamilton, Steven J AU - Holley, Kathy M AU - Buhl, Kevin J AU - Bullard, Fern A AU - Weston, L Ken AU - McDonald, Susan F AD - Biological Resources Division, U.S. Geological Survey, Columbia Environmental Research Center, Field Research Station, 31247 436th Avenue, Yankton, SD 57078-6364, USA. steve_hamilton@usgs.gov Y1 - 2002/09/24/ PY - 2002 DA - 2002 Sep 24 SP - 253 EP - 281 VL - 59 IS - 3-4 SN - 0166-445X, 0166-445X KW - Antioxidants KW - 0 KW - Trace Elements KW - Water Pollutants, Chemical KW - Selenium KW - H6241UJ22B KW - Arsenic KW - N712M78A8G KW - Index Medicus KW - Animals KW - Fresh Water KW - Food Chain KW - Arsenic -- pharmacology KW - Tissue Distribution KW - Colorado KW - Larva -- growth & development KW - Larva -- drug effects KW - Cypriniformes -- growth & development KW - Selenium -- pharmacokinetics KW - Selenium -- toxicity KW - Cypriniformes -- physiology KW - Water Pollutants, Chemical -- toxicity KW - Antioxidants -- toxicity KW - Environmental Exposure KW - Selenium -- antagonists & inhibitors KW - Antioxidants -- pharmacokinetics KW - Cypriniformes -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71927358?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.atitle=Toxicity+of+selenium+and+other+elements+in+food+organisms+to+razorback+sucker+larvae.&rft.au=Hamilton%2C+Steven+J%3BHolley%2C+Kathy+M%3BBuhl%2C+Kevin+J%3BBullard%2C+Fern+A%3BWeston%2C+L+Ken%3BMcDonald%2C+Susan+F&rft.aulast=Hamilton&rft.aufirst=Steven&rft.date=2002-09-24&rft.volume=59&rft.issue=3-4&rft.spage=253&rft.isbn=&rft.btitle=&rft.title=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.issn=0166445X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-12-09 N1 - Date created - 2002-07-19 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Application of classification-tree methods to identify nitrate sources in ground water. AN - 72169597; 12371171 AB - A study was conducted to determine if nitrate sources in ground water (fertilizer on crops, fertilizer on golf courses, irrigation spray from hog (Sus scrofa) wastes, and leachate from poultry litter and septic systems) could be classified with 80% or greater success. Two statistical classification-tree models were devised from 48 water samples containing nitrate from five source categories. Model 1 was constructed by evaluating 32 variables and selecting four primary predictor variables (delta 15N, nitrate to ammonia ratio, sodium to potassium ratio, and zinc) to identify nitrate sources. A delta 15N value of nitrate plus potassium > 18.2 indicated animal sources; a value 575 indicated inorganic fertilizer on agricultural crops; a ratio 3.2 indicated septic-system wastes; a ratio 2.8 indicated spray wastes from hog lagoons; a value < 2.8 indicated poultry wastes. Model 2 was devised by using all variables except delta 15N. This model also included four variables (sodium plus potassium, nitrate to ammonia ratio, calcium to magnesium ratio, and sodium to potassium ratio) to distinguish categories. Both models were able to distinguish all five source categories with better than 80% overall success and with 71 to 100% success in individual categories using the learning samples. Seventeen water samples that were not used in model development were tested using Model 2 for three categories, and all were correctly classified. Classification-tree models show great potential in identifying sources of contamination and variables important in the source-identification process. JF - Journal of environmental quality AU - Spruill, Timothy B AU - Showers, William J AU - Howe, Stephen S AD - United States Geological Survey, 3916 Sunset Ridge Rd., Raleigh, NC 27607, USA. tspruill@usgs.gov PY - 2002 SP - 1538 EP - 1549 VL - 31 IS - 5 SN - 0047-2425, 0047-2425 KW - Fertilizers KW - 0 KW - Manure KW - Nitrates KW - Soil Pollutants KW - Water Pollutants KW - Index Medicus KW - Swine KW - Environmental Monitoring KW - Animals KW - Poultry KW - Water Supply KW - Water Pollutants -- analysis KW - Nitrates -- analysis KW - Soil Pollutants -- analysis KW - Nitrates -- classification KW - Models, Theoretical UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72169597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+quality&rft.atitle=Application+of+classification-tree+methods+to+identify+nitrate+sources+in+ground+water.&rft.au=Spruill%2C+Timothy+B%3BShowers%2C+William+J%3BHowe%2C+Stephen+S&rft.aulast=Spruill&rft.aufirst=Timothy&rft.date=2002-09-01&rft.volume=31&rft.issue=5&rft.spage=1538&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+quality&rft.issn=00472425&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-02-06 N1 - Date created - 2002-10-09 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - 15N NMR investigation of the covalent binding of reduced TNT amines to soil humic acid, model compounds, and lignocellulose. AN - 72124637; 12322752 AB - The five major reductive degradation products of TNT-4ADNT (4-amino-2,6-dinitrotoluene), 2ADNT (2-amino-4,6-dinitrotoluene), 2,4DANT (2,4-diamino-6-nitrotoluene), 2,6DANT (2,6-diamino-4-nitrotoluene), and TAT (2,4,6-triaminotoluene)-labeled with 15N in the amine positions, were reacted with the IHSS soil humic acid and analyzed by 15N NMR spectrometry. In the absence of catalysts, all five amines underwent nucleophilic addition reactions with quinone and other carbonyl groups in the soil humic acid to form both heterocyclic and nonheterocyclic condensation products. Imine formation via 1,2-addition of the amines to quinone groups in the soil humic acid was significant with the diamines and TAT but not the monoamines. Horseradish peroxidase (HRP) catalyzed an increase in the incorporation of all five amines into the humic acid. In the case of the diamines and TAT, HRP also shifted the binding away from heterocyclic condensation product toward imine formation. A comparison of quantitative liquid phase with solid-state CP/MAS 15N NMR indicated that the CP experiment underestimated imine and heterocyclic nitrogens in humic acid, even with contact times optimal for observation of these nitrogens. Covalent binding of the mono- and diamines to 4-methylcatechol, the HRP catalyzed condensation of 4ADNT and 2,4DANT to coniferyl alcohol, and the binding of 2,4DANT to lignocellulose with and without birnessite were also examined. JF - Environmental science & technology AU - Thorn, K A AU - Kennedy, K R AD - U.S. Geological Survey, Denver Federal Center, Colorado 80225-0046, USA. kathorn@usgs.gov Y1 - 2002/09/01/ PY - 2002 DA - 2002 Sep 01 SP - 3787 EP - 3796 VL - 36 IS - 17 SN - 0013-936X, 0013-936X KW - Amines KW - 0 KW - Humic Substances KW - Nitrogen Isotopes KW - Soil Pollutants KW - lignocellulose KW - 11132-73-3 KW - Trinitrotoluene KW - 118-96-7 KW - Cellulose KW - 9004-34-6 KW - Lignin KW - 9005-53-2 KW - Index Medicus KW - Models, Chemical KW - Magnetic Resonance Spectroscopy KW - Trinitrotoluene -- chemistry KW - Humic Substances -- chemistry KW - Amines -- chemistry KW - Lignin -- chemistry KW - Cellulose -- chemistry KW - Soil Pollutants -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72124637?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=15N+NMR+investigation+of+the+covalent+binding+of+reduced+TNT+amines+to+soil+humic+acid%2C+model+compounds%2C+and+lignocellulose.&rft.au=Thorn%2C+K+A%3BKennedy%2C+K+R&rft.aulast=Thorn&rft.aufirst=K&rft.date=2002-09-01&rft.volume=36&rft.issue=17&rft.spage=3787&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-02-26 N1 - Date created - 2002-09-26 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - 15N NMR investigation of the reduction and binding of TNT in an aerobic bench scale reactor simulating windrow composting. AN - 72119410; 12322753 AB - T15NT was added to a soil of low organic carbon content and composted for 20 days in an aerobic bench scale reactor. The finished whole compost and fulvic acid, humic acid, humin, and lignocellulose fractions extracted from the compost were analyzed by solid-state CP/MAS and DP/MAS 15N NMR. 15N NMR spectra provided direct spectroscopic evidence for reduction of TNT followed by covalent binding of the reduced metabolites to organic matter of the composted soil, with the majority of metabolite found in the lignocellulose fraction, by mass also the major fraction of the compost. In general, the types of bonds formed between soil organic matter and reduced TNT amines in controlled laboratory reactions were observed in the spectra of the whole compost and fractions, confirming that during composting TNT is reduced to amines that form covalent bonds with organic matter through aminohydroquinone, aminoquinone, heterocyclic, and imine linkages, among others. Concentrations of imine nitrogens in the compost spectra suggest that covalent binding by the diamines 2,4DANT and 2,6DANT is a significant process in the transformation of TNT into bound residues. Liquid-phase 15N NMR spectra of the fulvic acid and humin fractions provided possible evidence for involvement of phenoloxidase enzymes in covalent bond formation. JF - Environmental science & technology AU - Thorn, K A AU - Pennington, J C AU - Hayes, C A AD - U.S. Geological Survey, Denver Federal Center, Colorado 80225-0046, USA. kathorn@usgs.gov Y1 - 2002/09/01/ PY - 2002 DA - 2002 Sep 01 SP - 3797 EP - 3805 VL - 36 IS - 17 SN - 0013-936X, 0013-936X KW - Amines KW - 0 KW - Humic Substances KW - Nitrogen Isotopes KW - Soil Pollutants KW - humin KW - lignocellulose KW - 11132-73-3 KW - Trinitrotoluene KW - 118-96-7 KW - Cellulose KW - 9004-34-6 KW - Lignin KW - 9005-53-2 KW - Index Medicus KW - Oxidation-Reduction KW - Humic Substances -- chemistry KW - Bioreactors KW - Amines -- chemistry KW - Lignin -- chemistry KW - Cellulose -- chemistry KW - Aerobiosis KW - Magnetic Resonance Spectroscopy KW - Trinitrotoluene -- chemistry KW - Trinitrotoluene -- analysis KW - Soil Pollutants -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72119410?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+quality&rft.atitle=Application+of+classification-tree+methods+to+identify+nitrate+sources+in+ground+water.&rft.au=Spruill%2C+Timothy+B%3BShowers%2C+William+J%3BHowe%2C+Stephen+S&rft.aulast=Spruill&rft.aufirst=Timothy&rft.date=2002-09-01&rft.volume=31&rft.issue=5&rft.spage=1538&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+quality&rft.issn=00472425&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-02-26 N1 - Date created - 2002-09-26 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Vulnerability of U.S. national parks to sea-level rise and coastal change AN - 52045342; 2002-081862 AB - The National Park Service (NPS) manages all 12,000 kilometers (7,500 miles) of shorelines along oceans and the Great Lakes. In 2001, the U.S. Geological Survey (USGS), in partnership with the NPS Geological Resources Division, began conducting hazard assessments and creating map products to assist the NPS in managing vulnerable coastal resources. One of the most important and practical issues in coastal geology is determining the physical response of coastal environments to water-level changes. Two trends may affect shorelines in U.S. national parks: rising global sea level and falling Great Lakes water levels. JF - Fact Sheet - U. S. Geological Survey AU - Thieler, E Robert AU - Williams, S Jeffress AU - Beavers, Rebecca L Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 2 PB - U. S. Geological Survey, Reston, VA KW - United States KW - salt-water intrusion KW - geologic hazards KW - erosion KW - regional planning KW - damage KW - shorelines KW - national parks KW - landforms KW - public lands KW - ground water KW - sea-level changes KW - transgression KW - wetlands KW - coastal environment KW - risk assessment KW - USGS KW - land use KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52045342?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Thieler%2C+E+Robert%3BWilliams%2C+S+Jeffress%3BBeavers%2C+Rebecca+L&rft.aulast=Thieler&rft.aufirst=E&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Vulnerability+of+U.S.+national+parks+to+sea-level+rise+and+coastal+change&rft.title=Vulnerability+of+U.S.+national+parks+to+sea-level+rise+and+coastal+change&rft.issn=&rft_id=info:doi/ L2 - http://pubs.usgs.gov/fs/fs095-02/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2002-01-01 N1 - Number of references - 3 N1 - Availability - U. S. Geol. Surv., Denver, CO, United States N1 - PubXState - VA N1 - Document feature - illus. incl. sketch map N1 - Last updated - 2012-06-07 N1 - CODEN - #03880 N1 - SubjectsTermNotLitGenreText - coastal environment; damage; erosion; geologic hazards; ground water; land use; landforms; national parks; public lands; regional planning; risk assessment; salt-water intrusion; sea-level changes; shorelines; transgression; United States; USGS; wetlands ER - TY - JOUR T1 - Tanana Flats earth cover classification AN - 52011014; 2003-025689 JF - BLM - Alaska Technical Report AU - Payne, John AU - Kempka, Dick Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 33 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - thematic mapper KW - land cover KW - imagery KW - data processing KW - mapping KW - vegetation KW - geographic information systems KW - East-Central Alaska KW - data bases KW - Alaska Range KW - Tanana Flats KW - ecology KW - hydrology KW - Fairbanks Alaska KW - satellite methods KW - biota KW - Southern Alaska KW - classification KW - information systems KW - Alaska KW - military facilities KW - land use KW - remote sensing KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52011014?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BKempka%2C+Dick&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Tanana+Flats+earth+cover+classification&rft.title=Tanana+Flats+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 11 N1 - PubXState - AK N1 - Document feature - illus. incl. 4 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - Alaska; Alaska Range; biota; classification; data bases; data processing; East-Central Alaska; ecology; Fairbanks Alaska; geographic information systems; hydrology; imagery; information systems; land cover; land use; mapping; military facilities; remote sensing; satellite methods; Southern Alaska; Tanana Flats; thematic mapper; United States; vegetation ER - TY - JOUR T1 - Steese-White Mountains earth cover classification AN - 52009071; 2003-025695 JF - BLM - Alaska Technical Report AU - Payne, John AU - Herriges, Jim AU - Macleod, Robb Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 55 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - thematic mapper KW - land cover KW - imagery KW - Global Positioning System KW - Steese National Conservation Area KW - data processing KW - mapping KW - vegetation KW - relief KW - geographic information systems KW - East-Central Alaska KW - data bases KW - ecology KW - hydrology KW - cartography KW - satellite methods KW - biota KW - habitat KW - classification KW - aerial photography KW - information systems KW - Alaska KW - White Mountains KW - landscapes KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52009071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BHerriges%2C+Jim%3BMacleod%2C+Robb&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Steese-White+Mountains+earth+cover+classification&rft.title=Steese-White+Mountains+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 14 N1 - PubXState - AK N1 - Document feature - illus. incl. 8 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - aerial photography; Alaska; biota; cartography; classification; data bases; data processing; East-Central Alaska; ecology; field studies; geographic information systems; Global Positioning System; habitat; hydrology; imagery; information systems; land cover; landscapes; mapping; relief; remote sensing; satellite methods; Steese National Conservation Area; thematic mapper; United States; vegetation; White Mountains ER - TY - JOUR T1 - Yukon-Charley/Black River/Fortymile earth cover classification AN - 52007725; 2003-025698 JF - BLM - Alaska Technical Report AU - Wesser, Sara AU - Payne, John AU - Macleod, Robb Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 40 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - land cover KW - imagery KW - Global Positioning System KW - data processing KW - Yukon-Charley Rivers National Preserve KW - mapping KW - vegetation KW - geographic information systems KW - East-Central Alaska KW - Eagle Alaska KW - data bases KW - ecology KW - hydrology KW - Yukon Territory KW - satellite methods KW - biota KW - Canada KW - classification KW - Fortymile River basin KW - Black River basin KW - aerial photography KW - Western Canada KW - information systems KW - Alaska KW - accuracy KW - land use KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007725?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Wesser%2C+Sara%3BPayne%2C+John%3BMacleod%2C+Robb&rft.aulast=Wesser&rft.aufirst=Sara&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Yukon-Charley%2FBlack+River%2FFortymile+earth+cover+classification&rft.title=Yukon-Charley%2FBlack+River%2FFortymile+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 14 N1 - PubXState - AK N1 - Document feature - illus. incl. 8 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - accuracy; aerial photography; Alaska; biota; Black River basin; Canada; classification; data bases; data processing; Eagle Alaska; East-Central Alaska; ecology; field studies; Fortymile River basin; geographic information systems; Global Positioning System; hydrology; imagery; information systems; land cover; land use; mapping; remote sensing; satellite methods; United States; vegetation; Western Canada; Yukon Territory; Yukon-Charley Rivers National Preserve ER - TY - JOUR T1 - Susitna MOA earth cover classification AN - 52007228; 2003-025688 JF - BLM - Alaska Technical Report AU - Payne, John AU - Sterrenberg, Beate AU - Macleod, Robb Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 67 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - thematic mapper KW - land cover KW - imagery KW - Global Positioning System KW - data processing KW - mapping KW - vegetation KW - Susitna Military Operations Area KW - relief KW - geographic information systems KW - data bases KW - ecology KW - hydrology KW - cartography KW - satellite methods KW - biota KW - Southern Alaska KW - Tyonek Quadrangle KW - habitat KW - classification KW - Talkeetna Quadrangle KW - aerial photography KW - information systems KW - Alaska KW - landscapes KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007228?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BSterrenberg%2C+Beate%3BMacleod%2C+Robb&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Susitna+MOA+earth+cover+classification&rft.title=Susitna+MOA+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 16 N1 - PubXState - AK N1 - Document feature - illus. incl. 3 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - aerial photography; Alaska; biota; cartography; classification; data bases; data processing; ecology; field studies; geographic information systems; Global Positioning System; habitat; hydrology; imagery; information systems; land cover; landscapes; mapping; relief; remote sensing; satellite methods; Southern Alaska; Susitna Military Operations Area; Talkeetna Quadrangle; thematic mapper; Tyonek Quadrangle; United States; vegetation ER - TY - JOUR T1 - Tiekel earth cover classification AN - 52007075; 2003-025690 JF - BLM - Alaska Technical Report AU - Payne, John AU - Sondergaard, Mike AU - Macleod, Robb Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 49 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - thematic mapper KW - land cover KW - imagery KW - Global Positioning System KW - data processing KW - watersheds KW - mapping KW - vegetation KW - relief KW - Tiekel River basin KW - geographic information systems KW - data bases KW - ecology KW - hydrology KW - cartography KW - satellite methods KW - biota KW - Southern Alaska KW - habitat KW - classification KW - aerial photography KW - information systems KW - Alaska KW - landscapes KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BSondergaard%2C+Mike%3BMacleod%2C+Robb&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Tiekel+earth+cover+classification&rft.title=Tiekel+earth+cover+classification&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 15 N1 - PubXState - AK N1 - Document feature - illus. incl. 4 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - aerial photography; Alaska; biota; cartography; classification; data bases; data processing; ecology; field studies; geographic information systems; Global Positioning System; habitat; hydrology; imagery; information systems; land cover; landscapes; mapping; relief; remote sensing; satellite methods; Southern Alaska; thematic mapper; Tiekel River basin; United States; vegetation; watersheds ER - TY - JOUR T1 - National Petroleum Reserve-Alaska earth cover classification AN - 52007035; 2003-025696 JF - BLM - Alaska Technical Report AU - Payne, John AU - Kempka, Dick Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 81 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - land cover KW - imagery KW - Global Positioning System KW - data processing KW - mapping KW - vegetation KW - geographic information systems KW - data bases KW - ecology KW - soils KW - hydrology KW - satellite methods KW - biota KW - National Petroleum Reserve Alaska KW - Northern Alaska KW - classification KW - aerial photography KW - information systems KW - Alaska KW - accuracy KW - land use KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007035?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Payne%2C+John%3BKempka%2C+Dick&rft.aulast=Payne&rft.aufirst=John&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=190&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 21 N1 - PubXState - AK N1 - Document feature - illus. incl. 12 tables, sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - accuracy; aerial photography; Alaska; biota; classification; data bases; data processing; ecology; field studies; geographic information systems; Global Positioning System; hydrology; imagery; information systems; land cover; land use; mapping; National Petroleum Reserve Alaska; Northern Alaska; remote sensing; satellite methods; soils; United States; vegetation ER - TY - JOUR T1 - Kanuti NWR/Ray Mountains/Hogatza River earth cover classification AN - 52006334; 2003-025697 JF - BLM - Alaska Technical Report AU - Early, Tom AU - Saperstein, Lisa AU - Payne, John AU - Macleod, Robb AU - Sterrenberg, Beate Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 85 PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - United States KW - land cover KW - imagery KW - Global Positioning System KW - Ray Mountains KW - Hogatza River basin KW - data processing KW - mapping KW - vegetation KW - geographic information systems KW - East-Central Alaska KW - data bases KW - ecology KW - Melozitna Quadrangle KW - hydrology KW - West-Central Alaska KW - Tanana Quadrangle KW - satellite methods KW - Hughes Quadrangle KW - biota KW - classification KW - Kanuti National Wildlife Refuge KW - Bettles Quadrangle KW - Beaver Quadrangle KW - aerial photography KW - information systems KW - Alaska KW - accuracy KW - land use KW - remote sensing KW - field studies KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52006334?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Early%2C+Tom%3BSaperstein%2C+Lisa%3BPayne%2C+John%3BMacleod%2C+Robb%3BSterrenberg%2C+Beate&rft.aulast=Early&rft.aufirst=Tom&rft.date=2002-09-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Kanuti+NWR%2FRay+Mountains%2FHogatza+River+earth+cover+classification&rft.title=Journal+of+the+North+American+Benthological+Society&rft.issn=08873593&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 15 N1 - PubXState - AK N1 - Document feature - illus. incl. 4 tables, sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - accuracy; aerial photography; Alaska; Beaver Quadrangle; Bettles Quadrangle; biota; classification; data bases; data processing; East-Central Alaska; ecology; field studies; geographic information systems; Global Positioning System; Hogatza River basin; Hughes Quadrangle; hydrology; imagery; information systems; Kanuti National Wildlife Refuge; land cover; land use; mapping; Melozitna Quadrangle; Ray Mountains; remote sensing; satellite methods; Tanana Quadrangle; United States; vegetation; West-Central Alaska ER - TY - JOUR T1 - The large scelidothere Catonyx tarijensis (Xenarthra, Mylodontidae) from the Pleistocene of Uruguay AN - 51970924; 2003-048627 AB - The recovery of an almost complete skull and partial associated mandible of Catonyx tarijensis from Puerto Arazati, Department of San Jose, is the first record of this species from Urguay. Catonyx tarijensis is only known from the Ensenadan land mammal age. Mammals from multiple land mammal ages have been recovered from the San Jose formation and suggest that it is time transgressive and may range in age from the Montehermosan to the Ensenadan. JF - Journal of Vertebrate Paleontology AU - McDonald, H Gregory AU - Perea, Daniel Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 677 EP - 683 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3 SN - 0272-4634, 0272-4634 KW - Chordata KW - Puerto Arazati Uruguay KW - Quaternary KW - San Jose Formation KW - biostratigraphy KW - phylogeny KW - Uruguay KW - Mammalia KW - Catonyx tarijensis KW - Mylodontidae KW - morphology KW - Cenozoic KW - Theria KW - South America KW - Xenarthra KW - Pleistocene KW - taxonomy KW - Vertebrata KW - Eutheria KW - cladistics KW - Edentata KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51970924?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=The+large+scelidothere+Catonyx+tarijensis+%28Xenarthra%2C+Mylodontidae%29+from+the+Pleistocene+of+Uruguay&rft.au=McDonald%2C+H+Gregory%3BPerea%2C+Daniel&rft.aulast=McDonald&rft.aufirst=H&rft.date=2002-09-01&rft.volume=22&rft.issue=3&rft.spage=677&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 37 N1 - PubXState - OK N1 - Document feature - illus. incl. strat. col., 2 tables, sketch map N1 - SuppNotes - Includes appendix N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - biostratigraphy; Catonyx tarijensis; Cenozoic; Chordata; cladistics; Edentata; Eutheria; Mammalia; morphology; Mylodontidae; phylogeny; Pleistocene; Puerto Arazati Uruguay; Quaternary; San Jose Formation; South America; taxonomy; Tetrapoda; Theria; Uruguay; Vertebrata; Xenarthra ER - TY - JOUR T1 - Theft and vandalism of vertebrate tracksites; challenges of in situ management and protection AN - 51824024; 2004-055443 JF - Journal of Vertebrate Paleontology AU - Santucci, Vincent AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 103 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - fossil localities KW - Chordata KW - global KW - ichnofossils KW - Grand Canyon National Park KW - tracks KW - education KW - Reptilia KW - Grand Canyon KW - conservation KW - land management KW - Arizona KW - dinosaurs KW - Vertebrata KW - Tetrapoda KW - preservation KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51824024?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Theft+and+vandalism+of+vertebrate+tracksites%3B+challenges+of+in+situ+management+and+protection&rft.au=Santucci%2C+Vincent%3BAnonymous&rft.aulast=Santucci&rft.aufirst=Vincent&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=103&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Arizona; Chordata; conservation; dinosaurs; education; fossil localities; global; Grand Canyon; Grand Canyon National Park; ichnofossils; land management; preservation; Reptilia; Tetrapoda; tracks; United States; Vertebrata ER - TY - JOUR T1 - Camel tracks and trackways from late Pliocene deposits, Graham County, Arizona AN - 51822890; 2004-055510 JF - Journal of Vertebrate Paleontology AU - Thompson, Mary E AU - Meldrum, D Jeffery AU - White, Richard S, Jr AU - Thrasher, Larry AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 114 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Ruminantia KW - Camelidae KW - ichnofossils KW - upper Pliocene KW - Cenozoic KW - Theria KW - Bear Springs Badlands KW - Tylopoda KW - Eutheria KW - Blancan KW - Chordata KW - assemblages KW - Mammalia KW - Artiodactyla KW - tracks KW - morphology KW - Tertiary KW - Neogene KW - Arizona KW - Pliocene KW - Vertebrata KW - Tetrapoda KW - Graham County Arizona KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51822890?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Camel+tracks+and+trackways+from+late+Pliocene+deposits%2C+Graham+County%2C+Arizona&rft.au=Thompson%2C+Mary+E%3BMeldrum%2C+D+Jeffery%3BWhite%2C+Richard+S%2C+Jr%3BThrasher%2C+Larry%3BAnonymous&rft.aulast=Thompson&rft.aufirst=Mary&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=114&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Arizona; Artiodactyla; assemblages; Bear Springs Badlands; Blancan; Camelidae; Cenozoic; Chordata; Eutheria; Graham County Arizona; ichnofossils; Mammalia; morphology; Neogene; Pliocene; Ruminantia; Tertiary; Tetrapoda; Theria; tracks; Tylopoda; United States; upper Pliocene; Vertebrata ER - TY - JOUR T1 - Trackway evidence of possible gregarious behavior in large theropods from the Lower Jurassic Moenave Formation of Zion National Park AN - 51821902; 2004-055477 JF - Journal of Vertebrate Paleontology AU - Smith, Joshua A AU - Sampson, Scott D AU - Loewen, Mark A AU - Santucci, Vincent AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 108 EP - 109 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Diapsida KW - Chordata KW - Jurassic KW - behavior KW - Zion National Park KW - ichnofossils KW - tracks KW - Mesozoic KW - southwestern Utah KW - Reptilia KW - Archosauria KW - Lower Jurassic KW - Theropoda KW - Saurischia KW - dinosaurs KW - Utah KW - Vertebrata KW - Moenave Formation KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51821902?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Trackway+evidence+of+possible+gregarious+behavior+in+large+theropods+from+the+Lower+Jurassic+Moenave+Formation+of+Zion+National+Park&rft.au=Smith%2C+Joshua+A%3BSampson%2C+Scott+D%3BLoewen%2C+Mark+A%3BSantucci%2C+Vincent%3BAnonymous&rft.aulast=Smith&rft.aufirst=Joshua&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=108&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Archosauria; behavior; Chordata; Diapsida; dinosaurs; ichnofossils; Jurassic; Lower Jurassic; Mesozoic; Moenave Formation; Reptilia; Saurischia; southwestern Utah; Tetrapoda; Theropoda; tracks; United States; Utah; Vertebrata; Zion National Park ER - TY - JOUR T1 - Digital mapping of dinosaur tracks in the Grand Staircase-Escalante National Monument, Utah AN - 51821595; 2004-055332 JF - Journal of Vertebrate Paleontology AU - Matthews, Neffra A AU - Noble, Tom AU - Titus, Alan L AU - Foster, John AU - Breithaupt, Brent H AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 85 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - methods KW - digital data KW - Diapsida KW - Global Positioning System KW - ichnofossils KW - mapping KW - Sauropoda KW - Archosauria KW - geographic information systems KW - Grand Staircase-Escalante National Monument KW - Garfield County Utah KW - dinosaurs KW - Chordata KW - Upper Jurassic KW - Jurassic KW - tracks KW - photogrammetry KW - Middle Jurassic KW - Mesozoic KW - Sauropodomorpha KW - Reptilia KW - Kane County Utah KW - paleoenvironment KW - Entrada Sandstone KW - Saurischia KW - aerial photography KW - information systems KW - Utah KW - Vertebrata KW - Tetrapoda KW - preservation KW - remote sensing KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51821595?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Digital+mapping+of+dinosaur+tracks+in+the+Grand+Staircase-Escalante+National+Monument%2C+Utah&rft.au=Matthews%2C+Neffra+A%3BNoble%2C+Tom%3BTitus%2C+Alan+L%3BFoster%2C+John%3BBreithaupt%2C+Brent+H%3BAnonymous&rft.aulast=Matthews&rft.aufirst=Neffra&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=85&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - aerial photography; Archosauria; Chordata; Diapsida; digital data; dinosaurs; Entrada Sandstone; Garfield County Utah; geographic information systems; Global Positioning System; Grand Staircase-Escalante National Monument; ichnofossils; information systems; Jurassic; Kane County Utah; mapping; Mesozoic; methods; Middle Jurassic; paleoenvironment; photogrammetry; preservation; remote sensing; Reptilia; Saurischia; Sauropoda; Sauropodomorpha; Tetrapoda; tracks; United States; Upper Jurassic; Utah; Vertebrata ER - TY - JOUR T1 - A faunal revision and overview of recent research of the Blancan 111 Ranch fossil beds in Graham County, Arizona AN - 51821495; 2004-055337 JF - Journal of Vertebrate Paleontology AU - McCullough, Gavin AU - Skaff, Andria L AU - Schirtzinger, Erin AU - Thrasher, Lawrence AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 86 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Ruminantia KW - Cervus KW - terrestrial environment KW - communities KW - bone beds KW - Tremarctos KW - Camelidae KW - behavior KW - ichnofossils KW - paleoecology KW - Cenozoic KW - Theria KW - Ursidae KW - sedimentary rocks KW - Fissipeda KW - Felidae KW - Tylopoda KW - Eutheria KW - Blancan KW - Perissodactyla KW - Chordata KW - assemblages KW - Equidae KW - arid environment KW - Carnivora KW - statistical analysis KW - Mammalia KW - Artiodactyla KW - tracks KW - Gila Conglomerate KW - faunal list KW - Cervidae KW - Tertiary KW - Neogene KW - Arizona KW - Bretzia KW - Pliocene KW - Vertebrata KW - Hippomorpha KW - Tetrapoda KW - Graham County Arizona KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51821495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=A+faunal+revision+and+overview+of+recent+research+of+the+Blancan+111+Ranch+fossil+beds+in+Graham+County%2C+Arizona&rft.au=McCullough%2C+Gavin%3BSkaff%2C+Andria+L%3BSchirtzinger%2C+Erin%3BThrasher%2C+Lawrence%3BAnonymous&rft.aulast=McCullough&rft.aufirst=Gavin&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=86&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - arid environment; Arizona; Artiodactyla; assemblages; behavior; Blancan; bone beds; Bretzia; Camelidae; Carnivora; Cenozoic; Cervidae; Cervus; Chordata; communities; Equidae; Eutheria; faunal list; Felidae; Fissipeda; Gila Conglomerate; Graham County Arizona; Hippomorpha; ichnofossils; Mammalia; Neogene; paleoecology; Perissodactyla; Pliocene; Ruminantia; sedimentary rocks; statistical analysis; terrestrial environment; Tertiary; Tetrapoda; Theria; tracks; Tremarctos; Tylopoda; United States; Ursidae; Vertebrata ER - TY - JOUR T1 - The late Pleistocene paleoecology of two extinct taxa; Jefferson's ground sloth (Megalonyx jeffersonii) and elk-moose (Cervalces scotti) AN - 51821464; 2004-055449 JF - Journal of Vertebrate Paleontology AU - Schubert, Blaine W AU - Graham, Russell W AU - McDonald, H Gregory AU - Grimm, Eric C AU - Stafford, Thomas W AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 104 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Ruminantia KW - Bolling KW - isotopes KW - Megalonyx jeffersonii KW - vegetation KW - Cervalces KW - upper Pleistocene KW - Cenozoic KW - upper Weichselian KW - Theria KW - radioactive isotopes KW - pollen KW - Weichselian KW - carbon KW - absolute age KW - miospores KW - Eutheria KW - Chordata KW - Quaternary KW - Illinois KW - Mammalia KW - Artiodactyla KW - northern Illinois KW - Lang Farm KW - Cervidae KW - paleoenvironment KW - Xenarthra KW - Cervalces scotti KW - palynomorphs KW - Pleistocene KW - Allerod KW - C-14 KW - Vertebrata KW - Edentata KW - Tetrapoda KW - microfossils KW - Megalonyx KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51821464?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=The+late+Pleistocene+paleoecology+of+two+extinct+taxa%3B+Jefferson%27s+ground+sloth+%28Megalonyx+jeffersonii%29+and+elk-moose+%28Cervalces+scotti%29&rft.au=Schubert%2C+Blaine+W%3BGraham%2C+Russell+W%3BMcDonald%2C+H+Gregory%3BGrimm%2C+Eric+C%3BStafford%2C+Thomas+W%3BAnonymous&rft.aulast=Schubert&rft.aufirst=Blaine&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=104&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - absolute age; Allerod; Artiodactyla; Bolling; C-14; carbon; Cenozoic; Cervalces; Cervalces scotti; Cervidae; Chordata; Edentata; Eutheria; Illinois; isotopes; Lang Farm; Mammalia; Megalonyx; Megalonyx jeffersonii; microfossils; miospores; northern Illinois; paleoenvironment; palynomorphs; Pleistocene; pollen; Quaternary; radioactive isotopes; Ruminantia; Tetrapoda; Theria; United States; upper Pleistocene; upper Weichselian; vegetation; Vertebrata; Weichselian; Xenarthra ER - TY - JOUR T1 - Bone Cabin Quarry; myths, fables and untold tales AN - 51336235; 2004-055484 JF - Journal of Vertebrate Paleontology AU - Southwell, Elizabeth H AU - Breithaupt, Brent H AU - Adams, Thomas AU - Drucker, Sam AU - Whitmore, Mike AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 110 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Diapsida KW - Chordata KW - Carnosauria KW - legends KW - Jurassic KW - assemblages KW - Bone Cabin Quarry KW - Mesozoic KW - Albany County Wyoming KW - Sauropodomorpha KW - Sauropoda KW - Reptilia KW - Archosauria KW - Apatosaurus KW - Wyoming KW - Theropoda KW - Allosaurus KW - Saurischia KW - dinosaurs KW - Vertebrata KW - Diplodocidae KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51336235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Bone+Cabin+Quarry%3B+myths%2C+fables+and+untold+tales&rft.au=Southwell%2C+Elizabeth+H%3BBreithaupt%2C+Brent+H%3BAdams%2C+Thomas%3BDrucker%2C+Sam%3BWhitmore%2C+Mike%3BAnonymous&rft.aulast=Southwell&rft.aufirst=Elizabeth&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=110&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Albany County Wyoming; Allosaurus; Apatosaurus; Archosauria; assemblages; Bone Cabin Quarry; Carnosauria; Chordata; Diapsida; dinosaurs; Diplodocidae; Jurassic; legends; Mesozoic; Reptilia; Saurischia; Sauropoda; Sauropodomorpha; Tetrapoda; Theropoda; United States; Vertebrata; Wyoming ER - TY - JOUR T1 - Measuring local geographic variability in early Arikareean mammalian assemblages AN - 50288341; 2004-055143 JF - Journal of Vertebrate Paleontology AU - Fremd, Theodore John AU - Anonymous Y1 - 2002/09// PY - 2002 DA - September 2002 PB - University of Oklahoma, Norman, OK VL - 22 IS - 3, Suppl. SN - 0272-4634, 0272-4634 KW - United States KW - Chordata KW - terrestrial environment KW - assemblages KW - Mammalia KW - biogeography KW - variations KW - paleoecology KW - Cenozoic KW - Oregon KW - Tertiary KW - eastern Oregon KW - paleosols KW - Vertebrata KW - fossil record KW - Tetrapoda KW - Arikareean KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/50288341?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Bone+Cabin+Quarry%3B+myths%2C+fables+and+untold+tales&rft.au=Southwell%2C+Elizabeth+H%3BBreithaupt%2C+Brent+H%3BAdams%2C+Thomas%3BDrucker%2C+Sam%3BWhitmore%2C+Mike%3BAnonymous&rft.aulast=Southwell&rft.aufirst=Elizabeth&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=110&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Conference title - Sixty-second annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2004-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Arikareean; assemblages; biogeography; Cenozoic; Chordata; eastern Oregon; fossil record; Mammalia; Oregon; paleoecology; paleosols; terrestrial environment; Tertiary; Tetrapoda; United States; variations; Vertebrata ER - TY - JOUR T1 - Effect of adsorbed metal ions on the transport of Zn- and Ni-EDTA complexes in a sand and gravel aquifer AN - 19927707; 5492906 AB - Adsorption, complexation, and dissolution reactions strongly influenced the transport of metal ions complexed with ethylenediaminetetraacetic acid (EDTA) in a predominantly quartz-sand aquifer during two tracer tests conducted under mildly reducing conditions at pH 5.8 to 6.1. In tracer test M89, EDTA complexes of zinc (Zn) and nickel (Ni), along with excess free EDTA, were injected such that the lower portion of the tracer cloud traveled through a region with adsorbed manganese (Mn) and the upper portion of the tracer cloud traveled through a region with adsorbed Zn. In tracer test S89, Ni- and Zn-EDTA complexes, along with excess EDTA complexed with calcium (Ca), were injected into a region with adsorbed Mn. The only discernable chemical reaction between Ni-EDTA and the sediments was a small degree of reversible adsorption leading to minor retardation. In the absence of adsorbed Zn, the injected Zn was displaced from EDTA complexes by iron(III) [Fe(III)] dissolved from the sediments. Displacement of Zn by Fe(III) on EDTA became increasingly thermodynamically favorable with decreasing total EDTA concentration. The reaction was slow compared to the time-scale of transport. Free EDTA rapidly dissolved aluminum (Al) from the sediments, which was subsequently displaced slowly by Fe. In the portion of tracer cloud M89 that traveled through the region contaminated with adsorbed Zn, little displacement of Zn complexed with EDTA was observed, and Al was rapidly displaced from EDTA by Zn desorbed from the sediments, in agreement with equilibrium calculations. In tracer test S89, desorption of Mn dominated over the more thermodynamically favorable dissolution of Al oxyhydroxides. Comparison with results from M89 suggests that dissolution of Al oxyhydroxides in coatings on these sediment grains by Ca-EDTA was rate-limited whereas that by free EDTA reached equilibrium on the time-scale of transport. Rates of desorption are much faster than rates of dissolution of Fe oxyhydroxides from sediment-grain surfaces and, therefore, adsorbed metal ions can strongly influence the speciation of ligands like EDTA in soils and sediments, especially over small temporal and spatial scales. JF - Geochimica et Cosmochimica Acta AU - Kent, D B AU - Davis, JA AU - Anderson, LCD AU - Rea, BA AU - Coston, JA AD - U.S. Geological Survey, 345 Middlefield Rd. MS. 465, Menlo Park, CA 94025, USA, dbkent@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 3017 EP - 3036 VL - 66 IS - 17 SN - 0016-7037, 0016-7037 KW - Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Aquifers KW - Calcium KW - Path of Pollutants KW - Heavy metals KW - Nickel KW - Groundwater Pollution KW - Soil KW - Tracers KW - spatial distribution KW - Sand KW - metal ions KW - Zinc KW - Manganese KW - pH KW - Sediment pollution KW - Desorption KW - Heavy Metals KW - Sediments KW - Pollution (Groundwater) KW - Clouds KW - Chemical reactions KW - Aluminum KW - Adsorption KW - Coatings KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19927707?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=Camel+tracks+and+trackways+from+late+Pliocene+deposits%2C+Graham+County%2C+Arizona&rft.au=Thompson%2C+Mary+E%3BMeldrum%2C+D+Jeffery%3BWhite%2C+Richard+S%2C+Jr%3BThrasher%2C+Larry%3BAnonymous&rft.aulast=Thompson&rft.aufirst=Mary&rft.date=2002-09-01&rft.volume=22&rft.issue=3%2C+Suppl.&rft.spage=114&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-09-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Aquifers; Sediment pollution; Calcium; Desorption; Nickel; Sediments; Clouds; Soil; spatial distribution; Tracers; Chemical reactions; Sand; metal ions; Zinc; Aluminum; Adsorption; Manganese; pH; Coatings; Pollution (Groundwater); Heavy metals; Path of Pollutants; Groundwater Pollution; Heavy Metals ER - TY - JOUR T1 - Long-Term Evolution of Biodegradation and Volatilization Rates in a Crude Oil-Contaminated Aquifer AN - 19427836; 5642482 AB - Volatilization and subsequent biodegradation near the water Table make up a coupled natural attenuation pathway that results in significant mass loss of hydrocarbons. Rates of biodegradation and volatilization were documented twice 12 years apart at a crude-oil spill site near Bemidji, Minnesota. Biodegradation rates were determined by calibrating a gas transport model to O sub(2), CO sub(2), and CH sub(4) gas-concentration data in the unsaturated zone. Reaction stoichiometry was assumed in converting O sub(2) and CO sub(2) gas-flux estimates to rates of aerobic biodegradation and CH sub(4) gas-flux estimates to rates of methanogenesis. Model results indicate that the coupled pathway has resulted in significant hydrocarbon mass loss at the site, and it was estimated that approximately 10.52 kg/day were lost in 1985 and 1.99 kg/day in 1997. In 1985 3% of total volatile hydrocarbons diffusing from the floating oil were biodegraded in the lower 1 m of the unsaturated zone and increased to 52% by 1997. Rates of hydrocarbon biodegradation above the center of the floating oil were relatively stable from 1985 to 1997, as the primary metabolic pathway shifted from aerobic to methanogenic biodegradation. Model results indicate that in 1997 biodegradation under methanogenenic conditions represented approximately one-half of total hydrocarbon biodegradation in the lower 1 m of the unsaturated zone. Further downgradient, where substrate concentrations have greatly increased, total biodegradation rates increased by greater than an order of magnitude from 0.04 to 0.43 g/m sub(2)-day. It appears that volatilization is the primary mechanism for attenuation in early stages of plume evolution, while biodegradation dominates in later stages. JF - Bioremediation Journal AU - Chaplin, B P AU - Delin, G N AU - Baker, R J AU - Lahvis, MA AD - U.S. Geological Survey, Water Resources Department, Mounds View, MN 55112, USA, chaplin@usgs.gov Y1 - 2002/09/01/ PY - 2002 DA - 2002 Sep 01 SP - 237 EP - 255 VL - 6 IS - 3 SN - 1088-9868, 1088-9868 KW - Biotechnology and Bioengineering Abstracts; Water Resources Abstracts; Pollution Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Aeration Zone KW - Aquifers KW - Biodegradation KW - USA, Minnesota KW - W 30950:Waste Treatment & Pollution Clean-up KW - A 01063:Utilization KW - P 2000:FRESHWATER POLLUTION KW - SW 3070:Water quality control UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19427836?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=The+large+scelidothere+Catonyx+tarijensis+%28Xenarthra%2C+Mylodontidae%29+from+the+Pleistocene+of+Uruguay&rft.au=McDonald%2C+H+Gregory%3BPerea%2C+Daniel&rft.aulast=McDonald&rft.aufirst=H&rft.date=2002-09-01&rft.volume=22&rft.issue=3&rft.spage=677&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-03-01 N1 - Last updated - 2014-02-11 N1 - SubjectsTermNotLitGenreText - Aquifers; Biodegradation; USA, Minnesota ER - TY - JOUR T1 - Does Mallard Clutch Size Vary with Landscape Composition? AN - 18854056; 5660493 AB - We studied Mallards (Anas platyrhynchos) nesting in artificial nesting structures in northeastern North Dakota and compared clutch size between landscapes where proportion of cropland was either high (mean = 68.9%, cropland landscapes) or low (mean = 30.2%, grassland landscapes). Mallard clutch size was significantly related to nest initiation date and landscape composition. Mean clutch size, controlled for nest initiation date, was 1.24 plus or minus 0.33 SE eggs smaller on cropland landscapes than on grassland landscapes. Generality of this pattern across space, time, and type of nesting sites is unknown, as is causation. Demographic importance of variation in clutch size may be influenced by covariation with other demographic variables, such as nest success and abundance of breeding pairs, which also are negatively correlated with landscape proportion of cropland. We suggest that researchers examine relationships between clutch size and landscape composition in both structure-nesting and ground-nesting Mallards, in other geographic areas, and in other duck species. JF - Wilson Bulletin AU - Ball, I J AU - Artmann, MJ AU - Hoekman, ST AD - Montana Coop. Wildlife Research Unit, USGS, The Univ. of Montana, Missoula, MT 59812, USA, ball1@selway.umt.edu Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 404 EP - 406 PB - The Wilson Ornithological Society VL - 114 IS - 3 SN - 0043-5643, 0043-5643 KW - Mallard KW - grasslands KW - ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts KW - clutch size KW - Agriculture KW - Landscape KW - Freshwater KW - Environmental factors KW - Nests KW - Anas platyrhynchos KW - Grasslands KW - Agricultural land KW - Breeding sites KW - USA, North Dakota KW - Clutch KW - Aquatic birds KW - Q5 08523:Conservation, wildlife management and recreation KW - D 04671:Birds KW - Q1 08422:Environmental effects KW - Q1 08364:Reproduction and development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18854056?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wilson+Bulletin&rft.atitle=Does+Mallard+Clutch+Size+Vary+with+Landscape+Composition%3F&rft.au=Ball%2C+I+J%3BArtmann%2C+MJ%3BHoekman%2C+ST&rft.aulast=Ball&rft.aufirst=I&rft.date=2002-09-01&rft.volume=114&rft.issue=3&rft.spage=404&rft.isbn=&rft.btitle=&rft.title=Wilson+Bulletin&rft.issn=00435643&rft_id=info:doi/10.1043%2F0043-5643%282002%29114%280404%3ADMCSVW%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Agriculture; Breeding sites; Clutch; Environmental factors; Nests; Aquatic birds; clutch size; Grasslands; Agricultural land; Landscape; Anas platyrhynchos; USA, North Dakota; Freshwater DO - http://dx.doi.org/10.1043/0043-5643(2002)114(0404:DMCSVW)2.0.CO;2 ER - TY - JOUR T1 - A comment on the use of flushing time, residence time, and age as transport time scales AN - 18838929; 5509516 AB - Applications of transport time scales are pervasive in biological, hydrologic, and geochemical studies yet these times scales are not consistently defined and applied with rigor in the literature. We compare three transport time scales (flushing time, age, and residence time) commonly used to measure the retention of water or scalar quantities transported with water. We identify the underlying assumptions associated with each time scale, describe procedures for computing these time scales in idealized cases, and identify pitfalls when real-world systems deviate from these idealizations. We then apply the time scale definitions to a shallow 378 ha tidal lake to illustrate how deviations between real water bodies and the idealized examples can result from: (1) non-steady flow; (2) spatial variability in bathymetry, circulation, and transport time scales; and (3) tides that introduce complexities not accounted for in the idealized cases. These examples illustrate that no single transport time scale is valid for all time periods, locations, and constituents, and no one time scale describes all transport processes. We encourage aquatic scientists to rigorously define the transport time scale when it is applied, identify the underlying assumptions in the application of that concept, and ask if those assumptions are valid in the application of that approach for computing transport time scales in real systems. JF - Limnology and Oceanography AU - Monsen, N E AU - Cloern, JE AU - Lucas, LV AD - U.S. Geological Survey, 345 Middlefield Road, MS #496, Menlo Park, California 94025, USA, nemonsen@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 1545 EP - 1553 VL - 47 IS - 5 SN - 0024-3590, 0024-3590 KW - Tidal lakes KW - Time scales KW - Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Flow KW - Age KW - Residence time KW - Retention periods KW - Time dependent KW - Solutes KW - Comparative studies KW - Lakes KW - Hydrology KW - Renewal KW - Transport processes KW - Temporal Distribution KW - Water motion KW - Case study KW - Hydrologic Properties KW - Retention Time KW - Case Studies KW - Bathymetry KW - Solute Transport KW - Comparison Studies KW - Reviews KW - Analytical techniques KW - Flushing time KW - Water bodies KW - AQ 00001:Water Resources and Supplies KW - O 2090:Instruments/Methods KW - SW 0850:Lakes KW - Q2 09162:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18838929?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Molecular+Ecology+Notes&rft.atitle=Novel+molecular+markers+differentiate+Oncorhynchus+mykiss+%28rainbow+trout+and+steelhead%29+and+the+O.+clarki+%28cutthroat+trout%29+subspecies&rft.au=Ostberg%2C+C+O%3BRodriguez%2C+R+J&rft.aulast=Ostberg&rft.aufirst=C&rft.date=2002-09-01&rft.volume=2&rft.issue=3&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Molecular+Ecology+Notes&rft.issn=14718278&rft_id=info:doi/10.1046%2Fj.1471-8286.2002.00181.x LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Water motion; Lakes; Age; Residence time; Analytical techniques; Flushing time; Renewal; Transport processes; Water bodies; Bathymetry; Time dependent; Flow; Case study; Comparative studies; Solutes; Reviews; Retention periods; Hydrology; Hydrologic Properties; Comparison Studies; Retention Time; Solute Transport; Case Studies; Temporal Distribution ER - TY - JOUR T1 - Winter Home Range And Habitat Use Of Female Northern Saw-Whet Owls On Assateague Island, Maryland AN - 18790310; 5660482 AB - We quantified home range size and habitat selection of seven female Northern Saw-whet Owls (Aegolius acadicus) on Assateague Island, Maryland, during the winters of 1996 and 1997. Home range size (95% fixed kernel) was 103.5 ha ( plus or minus 50.3 SE). Home range size increased with time spent radio tracking as biweekly home ranges were smaller than those calculated for longer time periods. Home ranges often overlapped in time and space and in one instance the home range for one owl was completely within that of another owl. Northern Saw-whet Owls used primarily pine woods and shrub swamp habitats, with pine woods used more often than any other habitat type and significantly more than expected based on habitat availability. JF - Wilson Bulletin AU - Churchill, J B AU - Wood, P B AU - Brinker, D F AD - West Virginia Coop. Fish and Wildlife Research Unit, USGS-BRD and Div. of Forestry, West Virginia Univ., P.O. Box 6125, Morgantown, WV 26506, USA, pbwood@wvu.edu Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 309 EP - 313 PB - The Wilson Ornithological Society VL - 114 IS - 3 SN - 0043-5643, 0043-5643 KW - Northern saw-whet owl KW - Animal Behavior Abstracts; Ecology Abstracts KW - D 04671:Birds KW - Y 25506:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18790310?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wilson+Bulletin&rft.atitle=Winter+Home+Range+And+Habitat+Use+Of+Female+Northern+Saw-Whet+Owls+On+Assateague+Island%2C+Maryland&rft.au=Churchill%2C+J+B%3BWood%2C+P+B%3BBrinker%2C+D+F&rft.aulast=Churchill&rft.aufirst=J&rft.date=2002-09-01&rft.volume=114&rft.issue=3&rft.spage=309&rft.isbn=&rft.btitle=&rft.title=Wilson+Bulletin&rft.issn=00435643&rft_id=info:doi/10.1043%2F0043-5643%282002%29114%280309%3AWHRAHU%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/0043-5643(2002)114(0309:WHRAHU)2.0.CO;2 ER - TY - JOUR T1 - 2,3,7,8-Tetrachlorodibenzo-p-dioxin Toxicity in the Zebrafish Embryo: Local Circulation Failure in the Dorsal Midbrain Is Associated with Increased Apoptosis AN - 18693787; 5576206 AB - The article highlighted in this issue is "2,3,7,8-Tetrachlorodibenzo-p- dioxin Toxicity in the Zebrafish Embryo: Local Circulation Failure in the Dorsal Midbrain Is Associated with Increased Apoptosis" by W. Dong, H. Teraoka, K. Yamazaki, S. Imani, T. Imagawa, J. J. Stegeman, R. E. Peterson, and T. Hiraga (pp. 191-201). JF - Toxicological Sciences AU - Tillitt, DE AU - Papoulias, D M AD - Columbia Environmental Research Center, U.S. Department of Interior, Geological Survey, 4200 New Haven Rd., Columbia, Missouri 65201 Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 1 EP - 2 VL - 69 IS - 1 SN - 1096-6080, 1096-6080 KW - Apoptosis KW - Zebra danio KW - Zebra fish KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources; Pollution Abstracts; Toxicology Abstracts KW - Blood circulation KW - Circulation KW - Brain KW - TCDD KW - Toxicity KW - Freshwater KW - Toxicity tests KW - Chlorinated hydrocarbons KW - Danio rerio KW - Industrial wastes KW - Embryos KW - Danio KW - Circulatory system KW - X 24151:Acute exposure KW - Q1 08346:Physiology, biochemistry, biophysics KW - Q5 08504:Effects on organisms KW - P 6000:TOXICOLOGY AND HEALTH UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18693787?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Restoration+Ecology&rft.atitle=Quantifying+Vegetation+and+Nekton+Response+to+Tidal+Restoration+of+a+New+England+Salt+Marsh&rft.au=Roman%2C+C+T%3BRaposa%2C+K+B%3BAdamowicz%2C+S+C%3BJames-Pirri%2C+M%3BCatena%2C+J+G&rft.aulast=Roman&rft.aufirst=C&rft.date=2002-09-01&rft.volume=10&rft.issue=3&rft.spage=450&rft.isbn=&rft.btitle=&rft.title=Restoration+Ecology&rft.issn=10612971&rft_id=info:doi/10.1046%2Fj.1526-100X.2002.01036.x LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Industrial wastes; Blood circulation; Brain; Embryos; Toxicity tests; Chlorinated hydrocarbons; Circulatory system; Apoptosis; Circulation; TCDD; Toxicity; Danio rerio; Danio; Freshwater ER - TY - JOUR T1 - Efficacy of feces as an attractant for mammalian carnivores AN - 18688365; 5585207 AB - Researchers often rely on fatty acid scent tablets and commercial attractants to lure animals to specific locations. Feces have been tested as attractants in a liquidized state, but not in their natural form, which provides a visual cue along with an olfactory cue. We used 1-m diameter tracking stations of sand and soil to record tracks of animals that visited randomly assigned feces from captive coyotes (Canis latrans) and bobcats (Lynx rufus) and fatty acid scent tablets. Stations were established each season for 1 year and distributed equally between prairie and woodland habitats. We detected no difference in coyote visits to stations baited with coyote feces or bobcat feces. Likewise, bobcats showed no preference for 1 feces type over the other. Both bobcats and coyotes preferred feces to fatty acid scent tablets. JF - Southwestern Naturalist AU - Howard, ME AU - Zuercher, G L AU - Gipson, P S AU - Livingston, T R AD - Kansas Cooperative Fish and Wildlife Research Unit, United States Geological Survey, Division of Biology, Kansas State University, Manhattan, KS 66506, USA, gipson@ksu.edu Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 348 EP - 352 VL - 47 IS - 3 SN - 0038-4909, 0038-4909 KW - Bobcat KW - Coyote KW - Ecology Abstracts KW - D 04672:Mammals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18688365?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Southwestern+Naturalist&rft.atitle=Efficacy+of+feces+as+an+attractant+for+mammalian+carnivores&rft.au=Howard%2C+ME%3BZuercher%2C+G+L%3BGipson%2C+P+S%3BLivingston%2C+T+R&rft.aulast=Howard&rft.aufirst=ME&rft.date=2002-09-01&rft.volume=10&rft.issue=3&rft.spage=556&rft.isbn=&rft.btitle=&rft.title=Restoration+Ecology&rft.issn=10612971&rft_id=info:doi/10.1046%2Fj.1526-100X.2002.02033.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Regeneration of triangle-leaf bursage (Ambrosia deltoidea: Asteraceae): Germination behavior and persistent seed bank AN - 18683927; 5585217 JF - Southwestern Naturalist AU - Bowers, JE AD - United States Geological Survey, 1675 West Anklam Road, Tucson, AZ 85745, USA, jebowers@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 449 EP - 452 VL - 47 IS - 3 SN - 0038-4909, 0038-4909 KW - Ecology Abstracts KW - D 04640:Other angiosperms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18683927?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Southwestern+Naturalist&rft.atitle=Regeneration+of+triangle-leaf+bursage+%28Ambrosia+deltoidea%3A+Asteraceae%29%3A+Germination+behavior+and+persistent+seed+bank&rft.au=Bowers%2C+JE&rft.aulast=Bowers&rft.aufirst=JE&rft.date=2002-09-01&rft.volume=47&rft.issue=3&rft.spage=449&rft.isbn=&rft.btitle=&rft.title=Southwestern+Naturalist&rft.issn=00384909&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Comparing 20th Century Trends in U.S. and Global Agricultural Water and Land Use AN - 18632198; 5534866 AB - Globally and in the United States, agriculture is the major user not only of water but also of land. This paper compares trends in aggregate and per capita water and land use by the agricultural sector in the United States and the world during the 20th century. It finds that although cropland use per capita has been declining in both areas since the early 1900s, agricultural water use per capita only began declining in the latter half of that century. That the increases in efficiencies of agricultural water use lagged behind the increases in the efficiency of cropland use is consistent with the fact that farmers (and farming communities) have traditionally had stronger property rights to their land than to their water. As a result, through much of the 20th century, farmers had a greater incentive to improve the efficiency of land use than that of water use and to substitute water for land (or irrigated land for dryland) in producing crops. JF - Water International AU - Goklany, I M AD - Science and Technology Policy, Office of Policy Analysis, United States Department of the Interior, Office of the Secretary, 1849 C Street, N.W., Washington, D.C. 20240, USA, igoklany@ios.doi.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 321 EP - 329 VL - 27 IS - 3 SN - 0250-8060, 0250-8060 KW - Aqualine Abstracts KW - Agriculture KW - Water use KW - USA KW - Water management KW - Water resources KW - Land use KW - Farms and farming KW - Crops KW - AQ 00001:Water Resources and Supplies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18632198?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+International&rft.atitle=Comparing+20th+Century+Trends+in+U.S.+and+Global+Agricultural+Water+and+Land+Use&rft.au=Goklany%2C+I+M&rft.aulast=Goklany&rft.aufirst=I&rft.date=2002-09-01&rft.volume=27&rft.issue=3&rft.spage=321&rft.isbn=&rft.btitle=&rft.title=Water+International&rft.issn=02508060&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Agriculture; Water use; Water management; Water resources; Crops; Farms and farming; Land use; USA ER - TY - JOUR T1 - Cornus florida L. mortality and understory composition changes in western Great Smoky Mountains National Park AN - 18622064; 5532135 AB - Remeasurement of woody vegetation on permanent plots in western Great Smoky Mountains National Park indicated that understory composition and dominance have changed over the past two decades (between 1977-1979 and 1995-2000). We observed heavy mortality of Cornus florida L., likely as a result of infection by Discula destructiva Redlin, a destructive fungus that causes dogwood anthracnose. Mortality was highest in smaller size classes and seedling density generally decreased. Cove and alluvial forests, where heavy shading favors dogwood anthracnose, had the highest mortality. While still high, mortality in oak-hickory and oak-pine forests was lower than that of cove and alluvial forests. Cornus florida density more than doubled on three plots located within an area that burned in 1976, likely as a result of sprouting and reduced shading in these fire-thinned stands. Over the same two decades, the importance of Tsuga canadensis (L.) Carr. greatly increased in cove, alluvial, oak-hickory, and oak-pine stands. Changes in understory composition in conjunction with the widespread loss of C. florida may greatly impact numerous ecological relationships in these forests, including calcium availability, nutrient cycling, and food source availability for wildlife. JF - Journal of the Torrey Botanical Society AU - Jenkins, MA AU - White, P S AD - National Park Service, Twin Creeks Natural Resources Center, 1314 Cherokee Orchard Road, Great Smoky Mountains National Park, Gatlinburg, TN 37738, USA, mike_jenkins@nps.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 194 EP - 206 VL - 129 IS - 3 SN - 1095-5674, 1095-5674 KW - Flowering dogwood KW - Ecology Abstracts KW - D 04125:Temperate forests UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18622064?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+Torrey+Botanical+Society&rft.atitle=Cornus+florida+L.+mortality+and+understory+composition+changes+in+western+Great+Smoky+Mountains+National+Park&rft.au=Jenkins%2C+MA%3BWhite%2C+P+S&rft.aulast=Jenkins&rft.aufirst=MA&rft.date=2002-09-01&rft.volume=129&rft.issue=3&rft.spage=194&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+Torrey+Botanical+Society&rft.issn=10955674&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Effects Of Canopy Gaps And Flooding On Homopterans In A Bottomland Hardwood Forest AN - 18596019; 5460146 AB - Canopy disturbance is a major factor affecting forest structure and composition and, as a result of habitat alterations, can influence insect communities. We initiated a field study to quantify the effects of canopy disturbance on aerial insect abundance and distribution within a bottomland hardwood forest along the Cache River, Arkansas, USA. We used passive flight-intercept traps to sample insects in canopy gap and forest interior habitats from May to July in 1996, 1997, and 1998. The hydrologic conditions of our study site varied among years: 1996 was relatively dry, 1997 incurred a long-duration flood, and 1998 was moderately wet. Of the 34,000+ Homopterans collected, many groups were distributed in a non-uniform manner among years and between habitats. Total Homopterans, two families of Homopterans, and six morphospecies were more abundant in canopy gaps than interior forest. Many Homopteran taxa were least abundant in 1997 following almost six months of flooding. Alternatively, relatively large Homopteran abundances were associated with the dry conditions of 1996 and the moderately wet conditions of 1998. Differences in Homopteran abundance among years and habitats may be related to differences in vegetation density. Canopy gaps supported more vegetation cover than the interior forest in all but the first sampling interval. In addition, similar to Homopteran abundance, vegetation density was lower in 1997 than in 1998. These results demonstrate that natural disturbance and flooding contribute to Homopteran abundance and distribution patterns in bottomland hardwood forests of the south central United States. JF - Wetlands AU - Gorham, LE AU - King, S L AU - Keeland, B D AU - Mopper, S AD - Johnson Controls World Services Inc. National Wetlands Research Center 700 Cajundome Blvd. Lafayette, Louisiana, USA 70506, bob_keeland@usgs.gov Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 541 EP - 549 PB - The Society of Wetland Scientists VL - 22 IS - 3 SN - 0277-5212, 0277-5212 KW - Scale insects KW - Treehoppers KW - USA, Arkansas, Cache R. KW - Whiteflies KW - ASFA 1: Biological Sciences & Living Resources; Water Resources Abstracts; Ecology Abstracts; Entomology Abstracts KW - Gaps KW - Abundance KW - Forests KW - Freshwater KW - Habitat KW - Ecological Distribution KW - Insects KW - Ecology KW - Habitats KW - Population Density KW - Flooding KW - USA, Arkansas KW - Canopies KW - Homoptera KW - Wetland Forests KW - Canopy KW - Data Collections KW - Z 05205:Populations & general ecology KW - D 04659:Insects KW - SW 0810:General KW - Q1 08301:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18596019?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands&rft.atitle=Effects+Of+Canopy+Gaps+And+Flooding+On+Homopterans+In+A+Bottomland+Hardwood+Forest&rft.au=Gorham%2C+LE%3BKing%2C+S+L%3BKeeland%2C+B+D%3BMopper%2C+S&rft.aulast=Gorham&rft.aufirst=LE&rft.date=2002-09-01&rft.volume=22&rft.issue=3&rft.spage=541&rft.isbn=&rft.btitle=&rft.title=Wetlands&rft.issn=02775212&rft_id=info:doi/10.1043%2F0277-5212%282002%29022%280541%3AEOCGAF%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Abundance; Flooding; Forests; Habitat; Gaps; Canopies; Ecology; Habitats; Population Density; Ecological Distribution; Wetland Forests; Canopy; Insects; Data Collections; Homoptera; USA, Arkansas; Freshwater DO - http://dx.doi.org/10.1043/0277-5212(2002)022(0541:EOCGAF)2.0.CO;2 ER - TY - JOUR T1 - Implications of Water Supply for Indigenous Americans during Holocene Aridity Phases on the Southern High Plains, USA AN - 18594602; 5446864 AB - Springs in the 40 to 50 large lake basins (>15 km super(2)) on the southern portion of the Southern High Plains (SHP) were active during periods of aridity in the Holocene when there may have been human habitation of the area. Eolian erosion of the lake floors and lunette accretion occurred as groundwater levels declined in response to decreased groundwater recharge. The declining lake floor associated with eolian erosion allowed groundwater evaporative discharge to continue, thus maintaining a groundwater gradient toward the lake. This hydrologic condition was favorable for a relatively continuous spring discharge to the lake, independent of the elevation of the lake floor. To evaluate the postulated dynamic equilibrium critical to this conclusion, 17 optically stimulated ages were determined from a 17.7-m deep core of a lunette adjacent to Double Lakes, Texas (33 degree 13'15 double prime N, 101 degree 54'08 double prime W). The core yielded sediment accumulation dates of 11,500 plus or minus 1100, 6500 plus or minus 700, and 4900 plus or minus 500 yr B.P., corresponding broadly with periods of aridity known from other evidence. Based on analysis of this lunette, it is concluded that springs in Double Lakes basin probably existed throughout the Holocene with discharges similar to those observed historically. We assumed that similar dynamic equilibrium existed in the other large lake basins in the SHP and that these springs could have provided a continuous source of water for indigenous peoples during periods of prolonged aridity. The dynamic equilibrium that is proposed in this study is applicable not only to other arid and semiarid geographic areas with wind-erodible material but also over different geologic times. [copy ] 2002 University of Washington. JF - Quaternary Research AU - Wood, W W AU - Stokes, S AU - Rich, J AD - MS 430, National Center, U.S. Geological Survey, Reston, Virginia, 20192, wwwood@usgs.gov Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 139 EP - 148 PB - Academic Press VL - 58 IS - 2 SN - 0033-5894, 0033-5894 KW - Holocene KW - USA, Texas KW - Ecology Abstracts; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Paleoclimatology KW - Wind Erosion KW - Lake Sediments KW - Water Supply KW - Holocene climates KW - Arid Climates KW - Paleoecology KW - Water availability KW - Human ecology KW - Lakes KW - Water Level Fluctuations KW - USA, Southern High Plains KW - Lake Bottom Springs KW - Dating KW - Geohydrology KW - Groundwater KW - Aridity KW - Water supply problems KW - M2 551.583.7:Palaeoclimatology // Subdivide as 551.7 if necessary // (551.583.7) KW - SW 0850:Lakes KW - D 04680:Paleoecology KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18594602?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quaternary+Research&rft.atitle=Implications+of+Water+Supply+for+Indigenous+Americans+during+Holocene+Aridity+Phases+on+the+Southern+High+Plains%2C+USA&rft.au=Wood%2C+W+W%3BStokes%2C+S%3BRich%2C+J&rft.aulast=Wood&rft.aufirst=W&rft.date=2002-09-01&rft.volume=58&rft.issue=2&rft.spage=139&rft.isbn=&rft.btitle=&rft.title=Quaternary+Research&rft.issn=00335894&rft_id=info:doi/10.1006%2Fqres.2002.2355 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Human ecology; Paleoecology; Water availability; Paleoclimatology; Holocene climates; Water supply problems; Aridity; Water Level Fluctuations; Lakes; Wind Erosion; Dating; Lake Sediments; Lake Bottom Springs; Water Supply; Geohydrology; Arid Climates; Groundwater; USA, Southern High Plains DO - http://dx.doi.org/10.1006/qres.2002.2355 ER - TY - JOUR T1 - Vegetation and climate controls on potential CO sub(2), DOC and DON production in northern latitude soils AN - 18584534; 5443058 AB - Climatic change may influence decomposition dynamics in arctic and boreal ecosystems, affecting both atmospheric CO sub(2) levels, and the flux of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) to aquatic systems. In this study, we investigated landscape-scale controls on potential production of these compounds using a one-year laboratory incubation at two temperatures (10 degree and 30 degree C). We measured the release of CO sub(2), DOC and DON from tundra soils collected from a variety of vegetation types and climatic regimes: tussock tundra at four sites along a latitudinal gradient from the interior to the north slope of Alaska, and soils from additional vegetation types at two of those sites (upland spruce at Fairbanks, and wet sedge and shrub tundra at Toolik Lake in northern Alaska). Vegetation type strongly influenced carbon fluxes. The highest CO sub(2) and DOC release at the high incubation temperature occurred in the soils of shrub tundra communities. Tussock tundra soils exhibited the next highest DOC fluxes followed by spruce and wet sedge tundra soils, respectively. Of the fluxes, CO sub(2) showed the greatest sensitivity to incubation temperatures and vegetation type, followed by DOC. DON fluxes were less variable. Total CO sub(2) and total DOC release were positively correlated, with DOC fluxes approximately 10% of total CO sub(2) fluxes. The ratio of CO sub(2) production to DOC release varied significantly across vegetation types with Tussock soils producing an average of four times as much CO sub(2) per unit DOC released compared to Spruce soils from the Fairbanks site. Sites in this study released 80-370 mg CO sub(2)-C g soil C super(-1) and 5-46 mg DOC g soil C super(-1) at high temperatures. The magnitude of these fluxes indicates that arctic carbon pools contain a large proportion of labile carbon that could be easily decomposed given optimal conditions. The size of this labile pool ranged between 9 and 41% of soil carbon on a g soil C basis, with most variation related to vegetation type rather than climate. JF - Global Change Biology AU - Neff, J C AU - Hooper, DU AD - Department of Biological Sciences, Stanford University, Stanford, CA 94305-5020, jneff@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 872 EP - 884 PB - Blackwell Science Ltd VL - 8 IS - 9 SN - 1354-1013, 1354-1013 KW - Meteorological & Geoastrophysical Abstracts; Ecology Abstracts KW - D 04600:Soil KW - M2 551.586:Biometeorology and Bioclimatology (551.586) KW - M2 551.588.6:Vegetation and forests (551.588.6) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18584534?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Change+Biology&rft.atitle=Vegetation+and+climate+controls+on+potential+CO+sub%282%29%2C+DOC+and+DON+production+in+northern+latitude+soils&rft.au=Neff%2C+J+C%3BHooper%2C+DU&rft.aulast=Neff&rft.aufirst=J&rft.date=2002-09-01&rft.volume=8&rft.issue=9&rft.spage=872&rft.isbn=&rft.btitle=&rft.title=Global+Change+Biology&rft.issn=13541013&rft_id=info:doi/10.1046%2Fj.1365-2486.2002.00517.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1046/j.1365-2486.2002.00517.x ER - TY - JOUR T1 - Hydrologic Variability And The Application Of Index Of Biotic Integrity Metrics To Wetlands: a Great Lakes Evaluation AN - 18565323; 5460150 AB - We studied six barrier beach wetlands in western Lake Superior, six drowned-river-mouth wetlands along the eastern shore of Lake Michigan, and six open shoreline wetlands in Saginaw Bay of Lake Huron. Plant, fish, and invertebrate communities were sampled in each wetland. The resulting data were assessed in various forms against gradients of human disturbance to identify potential metrics that could be used in IBI development. Our results suggested that the metrics proposed as potential components of an IBI for barrier beach wetlands of Lake Superior held promise. The metrics for Lake Michigan drowned-river-mouth wetlands were inconsistent in identifying gradients of disturbance; those for Lake Huron open embayment wetlands were yet more inconsistent. Despite the potential displayed by the Lake Superior results within the year sampled, we concluded that an IBI for use in Great Lakes wetlands would not be valid unless separate scoring ranges were derived for each of several sequences of water-level histories. Variability in lake levels from year to year can produce variability in data and affect the reproducibility of data collected, primarily due to extreme changes in plant communities and the faunal habitat they provide. Substantially different results could be obtained in the same wetland in different years as a result of the response to lake-level change, with no change in the level of human disturbance. Additional problems included limited numbers of comparable sites, potential lack of undisturbed reference sites, and variable effects of different disturbance types. We also evaluated our conclusions with respect to hydrologic variability and other major natural disturbances affecting wetlands in other regions. We concluded that after segregation of wetland types by geographic, geomorphic, and hydrologic features, a functional IBI may be possible for wetlands with relatively stable hydrology. However, an IBI for wetlands with unpredictable yet recurring influences of climate-induced, long-term high water periods, droughts, or drought-related fires or weather-related catastrophic floods or high winds (hurricanes) would also require differing scales of measurement for years that differ in the length of time since the last major natural disturbance. A site-specific, detailed ecological analysis of biological indicators may indeed be of value in determining the quality or status of wetlands, but we recommend that IBI scores not be used unless the scoring ranges are calibrated for the specific hydrologic history pre-dating any sampling year. JF - Wetlands AU - Wilcox, DA AU - Meeker, JE AU - Hudson, P L AU - Armitage, B J AU - Black, M G AU - Uzarski, D G AD - U. S. Geological Survey Great Lakes Science Center 1451 Green Road Ann Arbor, Michigan, USA 48105, douglas_wilcox@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 588 EP - 615 PB - The Society of Wetland Scientists VL - 22 IS - 3 SN - 0277-5212, 0277-5212 KW - North America, Great Lakes KW - ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Ecology Abstracts KW - Freshwater KW - SW 5080:Evaluation, processing and publication KW - SW 3030:Effects of pollution KW - Q2 02171:Dynamics of lakes and rivers KW - Q1 01382:Ecological techniques and apparatus KW - D 04705:Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18565323?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands&rft.atitle=Hydrologic+Variability+And+The+Application+Of+Index+Of+Biotic+Integrity+Metrics+To+Wetlands%3A+a+Great+Lakes+Evaluation&rft.au=Wilcox%2C+DA%3BMeeker%2C+JE%3BHudson%2C+P+L%3BArmitage%2C+B+J%3BBlack%2C+M+G%3BUzarski%2C+D+G&rft.aulast=Wilcox&rft.aufirst=DA&rft.date=2002-09-01&rft.volume=22&rft.issue=3&rft.spage=588&rft.isbn=&rft.btitle=&rft.title=Wetlands&rft.issn=02775212&rft_id=info:doi/10.1043%2F0277-5212%282002%29022%280588%3AHVATAO%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0277-5212(2002)022(0588:HVATAO)2.0.CO;2 ER - TY - JOUR T1 - Novel molecular markers differentiate Oncorhynchus mykiss (rainbow trout and steelhead) and the O. clarki (cutthroat trout) subspecies AN - 18474070; 5443104 AB - A suite of 26 PCR-based markers was developed that differentiates rainbow (Oncorhynchus mykiss) and coastal cutthroat trout (O. clarki clarki). The markers also differentiated rainbow from other cutthroat trout subspecies (O. clarki), and several of the markers differentiated between cutthroat trout subspecies. This system has numerous positive attributes, including: nonlethal sampling, high species-specificity and products that are easily identified and scored using agarose gel electrophoresis. The methodology described for developing the markers can be applied to virtually any system in which numerous markers are desired for identifying or differentiating species or subspecies. JF - Molecular Ecology Notes AU - Ostberg, C O AU - Rodriguez, R J AD - Western Fisheries Research Center, Biological Resources Division, US Geological Survey, 6505 NE 65th Street, Seattle, WA 98115, USA, carl_ostberg@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 197 EP - 202 PB - Blackwell Science Ltd VL - 2 IS - 3 SN - 1471-8278, 1471-8278 KW - Cutthroat trout KW - Rainbow trout KW - Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources; Genetics Abstracts KW - Q1 01345:Genetics and evolution KW - G 07371:Fish KW - D 04668:Fish UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18474070?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Molecular+Ecology+Notes&rft.atitle=Novel+molecular+markers+differentiate+Oncorhynchus+mykiss+%28rainbow+trout+and+steelhead%29+and+the+O.+clarki+%28cutthroat+trout%29+subspecies&rft.au=Ostberg%2C+C+O%3BRodriguez%2C+R+J&rft.aulast=Ostberg&rft.aufirst=C&rft.date=2002-09-01&rft.volume=2&rft.issue=3&rft.spage=197&rft.isbn=&rft.btitle=&rft.title=Molecular+Ecology+Notes&rft.issn=14718278&rft_id=info:doi/10.1046%2Fj.1471-8286.2002.00181.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1046/j.1471-8286.2002.00181.x ER - TY - JOUR T1 - Comparison of 5 benthic samplers to collect burrowing mayfly nymphs (Hexagenia spp.: Ephemeroptera: Ephemeridae) in sediments of the Laurentian Great Lakes AN - 1791885950; 5448901 AB - The recent return of burrowing mayfly nymphs (Hexagenia spp.) to western Lake Erie of the Laurentian Great Lakes has prompted a need to find a sampler to obtain the most accurate (i.e., highest mean density) and precise (i.e., lowest mean variance) abundance estimates of nymphs. The abundance of burrowing nymphs is important because it is being used as a measure of ecosystem health to determine management goals for fisheries and pollution abatement programs for waters in both North America and Europe. We compared efficiencies of 5 benthic grab samplers (Ponar, Ekman, petite Ponar, Petersen, and orange-peel) to collect nymphs from sediments of western Lake Erie and Lake St. Clair. Samplers were used at one site with soft substrates in both lakes in 1997 (Ponar, Ekman, petite Ponar, and Petersen) and 1998 (Ponar and Ekman), and at one site with soft and one site with hard substrates in Lake St. Clair in 1999 (Ponar and orange-peel). In addition, the Ponar, Ekman, and Petersen samplers were used at one site with soft substrates of western Lake Erie in 2000 to examine the causes of differences among samplers. The Ponar was more accurate than the other samplers; it collected the highest densities of nymphs for 31 of 32 date and site comparisons. In soft substrates, the order of decreasing overall densities was: Ponar>Petersen>petite Ponar>Ekman in western Lake Erie and Ponar>Petersen> Ekman>petite Ponar in Lake St. Clair in 1997, Ponar>Ekman in both lakes in 1998, and Ponar>orange-peel in Lake St. Clair in 1999. In hard substrates, the Ponar was more accurate than the orange-peel in Lake St. Clair in 1999. Precision of the Ponar was generally greater than the Ekman, petite Ponar, and Petersen but similar to the orange-peel. Higher densities of nymphs obtained with the Ponar than other grabs are attributed to its relatively heavy weight, which allows it to sample deeper in sediments than the Ekman and petite Ponar. Also, the Ponar has a screened top, which allows it to minimize hydraulic shock waves more than the Petersen, and uniform sides, which allow it to sample nymphs more uniformly through sediments than the orange-peel. We recommend that future estimates of burrowing mayfly densities be obtained with a standard Ponar sampler similar to the one used in our study because it will yield the most accurate and precise measurements of burrowing mayfly nymphs such as Hexagenia spp. JF - Journal of the North American Benthological Society AU - Schloesser, D W AU - Nalepa, T F AD - Great Lakes Science Center, US Geological Survey, Ann Arbor, Michigan 48105 USA, don_schloesser@usgs.gov Y1 - 2002/09// PY - 2002 DA - September 2002 SP - 487 EP - 501 PB - Allen Press, Inc., 810 East Tenth St. Lawrence KS 66044 USA, [mailto:webmaster@allenpress.com] VL - 21 IS - 3 SN - 0887-3593, 0887-3593 KW - Mayflies KW - North America, Great Lakes KW - ASFA 1: Biological Sciences & Living Resources; Entomology Abstracts; Water Resources Abstracts; Ecology Abstracts KW - Nymphs KW - Measuring Instruments KW - Lake Sediments KW - Abundance KW - Freshwater KW - Hexagenia KW - North America, Erie L. KW - Burrowing organisms KW - North America, St. Clair L. KW - Lakes KW - Efficiency KW - Ephemeroptera KW - Ephemeridae KW - Sampling KW - Aquatic insects KW - Benthos collecting devices KW - Grabs KW - Catching methods KW - Biomass KW - Samplers KW - Sediments KW - Comparison Studies KW - Biological sampling KW - Q1 08382:Ecological techniques and apparatus KW - SW 5040:Data acquisition KW - D 04001:Methodology - general KW - D 04659:Insects KW - Z 05210:Aquatic entomology KW - Z 05156:Techniques UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1791885950?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+North+American+Benthological+Society&rft.atitle=Comparison+of+5+benthic+samplers+to+collect+burrowing+mayfly+nymphs+%28Hexagenia+spp.%3A+Ephemeroptera%3A+Ephemeridae%29+in+sediments+of+the+Laurentian+Great+Lakes&rft.au=Schloesser%2C+D+W%3BNalepa%2C+T+F&rft.aulast=Schloesser&rft.aufirst=D&rft.date=2002-09-01&rft.volume=21&rft.issue=3&rft.spage=487&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+North+American+Benthological+Society&rft.issn=08873593&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Burrowing organisms; Nymphs; Efficiency; Benthos collecting devices; Grabs; Biological sampling; Biomass; Samplers; Aquatic insects; Lakes; Abundance; Catching methods; Sampling; Sediments; Comparison Studies; Measuring Instruments; Lake Sediments; Mayflies; Ephemeroptera; Ephemeridae; Hexagenia; North America, St. Clair L.; North America, Erie L.; Freshwater ER - TY - JOUR T1 - An Evaluation of Population Index and Estimation Techniques for Tadpoles in Desert Pools AN - 17666056; 5671209 AB - Using visual (VI) and dip net indices (DI) and double-observer (DOE), removal (RE), and neutral red dye capture-recapture (CRE) estimates, we counted, estimated, and censused Couch's spadefoot (Scaphiopus couchii) and canyon treefrog (Hyla arenicolor) tadpole populations in Big Bend National Park, Texas. Initial dye experiments helped us determine appropriate dye concentrations and exposure times to use in mesocosm and field trials. The mesocosm study revealed higher tadpole detection rates, more accurate population estimates, and lower coefficients of variation among pools compared to those from the field study. In both mesocosm and field studies, CRE was the best method for estimating tadpole populations, followed by DOE and RE. In the field, RE, DI, and VI often underestimated populations in pools with higher tadpole numbers. DI improved with increased sampling. Larger pools supported larger tadpole populations, and tadpole detection rates in general decreased with increasing pool volume and surface area. Hence, pool size influenced bias in tadpole sampling. Across all techniques, tadpole detection rates differed among pools, indicating that sampling bias was inherent and techniques did not consistently sample the same proportion of tadpoles in each pool. Estimating bias (i.e., calculating detection rates) therefore was essential in assessing tadpole abundance. Unlike VI and DOE, DI, RE, and CRE could be used in turbid waters in which tadpoles are not visible. The tadpole population estimates we used accommodated differences in detection probabilities in simple desert pool environments but may not work in more complex habitats. JF - Journal of Herpetology AU - Jung, R E AU - Dayton, G H AU - Williamson, S J AU - Sauer, J R AU - Droege, S Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 465 EP - 472 PB - The Society for the Study of Amphibians and Reptiles VL - 36 IS - 3 SN - 0022-1511, 0022-1511 KW - Canyon treefrog KW - Couch's spadefoot KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Freshwater KW - Q1 01321:General KW - Q1 01382:Ecological techniques and apparatus KW - D 04669:Amphibians UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/17666056?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wilson+Bulletin&rft.atitle=Does+Mallard+Clutch+Size+Vary+with+Landscape+Composition%3F&rft.au=Ball%2C+I+J%3BArtmann%2C+MJ%3BHoekman%2C+ST&rft.aulast=Ball&rft.aufirst=I&rft.date=2002-09-01&rft.volume=114&rft.issue=3&rft.spage=404&rft.isbn=&rft.btitle=&rft.title=Wilson+Bulletin&rft.issn=00435643&rft_id=info:doi/10.1043%2F0043-5643%282002%29114%280404%3ADMCSVW%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=0022-1511&volume=36&page=465 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-02-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0022-1511(2002)036(0465:AEOPIA)2.0.CO;2 ER - TY - JOUR T1 - Evaluation of Canoe Surveys for Anurans along the Rio Grande in Big Bend National Park, Texas AN - 17665544; 5671200 AB - Surveys for amphibians along large rivers pose monitoring and sampling problems. We used canoes at night to spotlight and listen for anurans along four stretches of the Rio Grande in Big Bend National Park, Texas, in 1998 and 1999. We explored temporal and spatial variation in amphibian counts and species richness and assessed relationships between amphibian counts and environmental variables, as well as amphibian-habitat associations along the banks of the Rio Grande. We documented seven anuran species, but Rio Grande leopard frogs (Rana berlandieri) accounted for 96% of the visual counts. Chorus surveys along the river detected similar or fewer numbers of species, but orders of magnitude fewer individuals compared to visual surveys. The number of species varied on average by 37% across monthly and nightly surveys. We found similar average coefficients of variation in counts of Rio Grande leopard frogs on monthly and nightly bases (CVs = 42-44%), suggesting that canoe surveys are a fairly precise technique for counts of this species. Numbers of Rio Grande leopard frogs observed were influenced by river gage levels and air and water temperatures, suggesting that surveys should be conducted under certain environmental conditions to maximize counts and maintain consistency. We found significant differences in species richness and bullfrog (Rana catesbeiana) counts among the four river stretches. Four rare anuran species were found along certain stretches but not others, which could represent either sampling error or unmeasured environmental or habitat differences among the river stretches. We found a greater association of Rio Grande leopard frogs with mud banks compared to rock or cliff (canyon) areas and with seepwillow and open areas compared to giant reed and other vegetation types. Canoe surveys appear to be a useful survey technique for anurans along the Rio Grande and may work for other large river systems as well. JF - Journal of Herpetology AU - Jung, R E AU - Bonine, KE AU - Rosenshield, M L AU - de la Reza, A AU - Raimondo, S AU - Droege, S Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 390 EP - 397 PB - The Society for the Study of Amphibians and Reptiles VL - 36 IS - 3 SN - 0022-1511, 0022-1511 KW - Bullfrog KW - Frogs KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Freshwater KW - Q1 01442:Population dynamics KW - D 04669:Amphibians UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/17665544?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Herpetology&rft.atitle=Evaluation+of+Canoe+Surveys+for+Anurans+along+the+Rio+Grande+in+Big+Bend+National+Park%2C+Texas&rft.au=Jung%2C+R+E%3BBonine%2C+KE%3BRosenshield%2C+M+L%3Bde+la+Reza%2C+A%3BRaimondo%2C+S%3BDroege%2C+S&rft.aulast=Jung&rft.aufirst=R&rft.date=2002-09-01&rft.volume=36&rft.issue=3&rft.spage=390&rft.isbn=&rft.btitle=&rft.title=Journal+of+Herpetology&rft.issn=00221511&rft_id=info:doi/10.1043%2F0022-1511%282002%29036%280390%3AEOCSFA%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=0022-1511&volume=36&page=390 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-02-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0022-1511(2002)036(0390:EOCSFA)2.0.CO;2 ER - TY - JOUR T1 - Activity Patterns and Monitoring Numbers of Horned Puffins and Parakeet Auklets AN - 1665488487; 5448884 AB - Nearshore counts of birds on the water and time-lapse photography were used to monitor seasonal activity patterns and interannual variation in numbers of Horned Puffins (Fratercula corniculata) and Parakeet Auklets (Aethia psittacula) at the Semidi Islands, Alaska. The best period for over-water counts was mid egg-laying through hatching in auklets and late prelaying through early hatching in puffins. Daily counts (07.00 h-09.30 h) varied widely, with peak numbers and days with few or no birds present occurring throughout the census period. Variation among annual means in four years amounted to 26% and 72% of total count variation in puffins and auklets, respectively. Time-lapse photography of nesting habitat in early incubation revealed a morning (08.00 h-12.00 h) peak in the number of puffins loitering on study plots. Birds recorded in time-lapse images never comprised more than a third of the estimated breeding population on a plot. Components of variance in the time-lapse study were 29% within hours, 9% among hours (08.00 h-12.00 h), and 62% among days (8-29 June). Variability of over-water and land-based counts is reduced by standardizing the time of day when counts are made, but weather conditions had little influence on either type of count. High interannual variation of population indices implies low power to detect numerical trends in crevice-nesting auklets and puffins. JF - Waterbirds AU - Hatch, SA AD - Alaska Science Center, U.S. Geological Survey, 1011 East Tudor Road, Anchorage, AK 99503, USA, scott_hatch@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 348 EP - 357 VL - 25 IS - 3 SN - 1524-4695, 1524-4695 KW - Horned puffin KW - Parakeet auklet KW - activity patterns KW - marine birds KW - ASFA 1: Biological Sciences & Living Resources; Oceanic Abstracts; Animal Behavior Abstracts; Ecology Abstracts KW - USA, Alaska KW - Fratercula corniculata KW - Marine KW - INE, USA, Alaska, Semidi Is. KW - Annual variations KW - Abundance KW - Seasonal distribution KW - Methodology KW - Breeding sites KW - Aethia psittacula KW - Photographs KW - Census KW - Activity patterns KW - Seasonal variations KW - Photography KW - Population number KW - O 1070:Ecology/Community Studies KW - Q1 08382:Ecological techniques and apparatus KW - D 04671:Birds KW - Y 25506:Birds KW - O 1090:Instruments/Methods KW - Q1 08442:Population dynamics KW - Q1 08423:Behaviour UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665488487?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Waterbirds&rft.atitle=Activity+Patterns+and+Monitoring+Numbers+of+Horned+Puffins+and+Parakeet+Auklets&rft.au=Hatch%2C+SA&rft.aulast=Hatch&rft.aufirst=SA&rft.date=2002-09-01&rft.volume=25&rft.issue=3&rft.spage=348&rft.isbn=&rft.btitle=&rft.title=Waterbirds&rft.issn=15244695&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Breeding sites; Annual variations; Photographs; Seasonal distribution; Census; Activity patterns; Photography; Methodology; Population number; Abundance; Seasonal variations; Fratercula corniculata; Aethia psittacula; USA, Alaska; INE, USA, Alaska, Semidi Is.; Marine ER - TY - JOUR T1 - Changes in concentrations of triazine and acetamide herbicides by bank filtration, ozonation, and chlorination in a public water supply AN - 16141917; 5465922 AB - The changes in triazine and acetamide concentrations in water during natural and artificial treatment by bank filtration, ozonation, filtration, and chlorination were measured at the well field and drinking water treatment plant of Lincoln, Nebraska, USA. The city's groundwater supply is affected by induced infiltration and transport of triazines and acetamide herbicides from the Platte River in late spring and early summer. The objective of the study was to evaluate the effect of infiltration and treatment on the presence of triazines and acetamides in drinking water. Samples of river water, well water, and public supply water at various stages of water treatment were collected from 1997 - 1999 during spring-runoff when the presence of herbicides in the Platte River is largest. In 1999, parent compounds were reduced by 76% of the concentration present in river water (33% by bank filtration, 41% by ozonation, and 1.5% by chlorination). Metabolites of herbicides for which analytical techniques existed were reduced by 21% (plus 26% by bank filtration, minus 23% by ozonation, and minus 24% by chlorination). However, increases in concentrations of specific metabolite compounds were identified after bank filtration and ozonation. After bank filtration, increases in cyanazine amide, cyanazine acid, and deethylcyanazine acid were identified. After ozonation, concentrations of deisopropylatrazine, deethylatrazine, didealkylatrazine, atrazine amide-I, hydroxydeethylatrazine, hydroxydeisopopylatrazine, deethylcyanazine acid, and deethylcyanazine increased. Concentrations of cyanazine acid and ethanesulfonic and oxanilic acids of acetamides decreased during ozonation. Our findings suggest that bank filtration and ozonation of water in part can shift the assessment of risk to human health associated with the consumption of the water from the parent compounds to their degradation products. JF - Journal of Hydrology (Amsterdam) AU - Verstraeten, I M AU - Thurman, E M AU - Lindsey, ME AU - Lee, E C AU - Smith, R D AD - U.S. Geological Survey, 8987 Yellow Brick Road, Baltimore MD 21237, USA, imverstr@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 190 EP - 208 VL - 266 IS - 3-4 SN - 0022-1694, 0022-1694 KW - USA, Nebraska, Lincoln KW - acetamide KW - triazine KW - Pollution Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Water supplies (Potable) KW - Water Pollution KW - Path of Pollutants KW - Water supplies KW - Drinking Water KW - Water treatment KW - Water Treatment KW - Bank filtration KW - Ozonation KW - Induced Infiltration KW - Fate of Pollutants KW - Triazines KW - Herbicides KW - Water pollution KW - Filtration KW - Degradation Products KW - Chlorination KW - Drinking water KW - P 2000:FRESHWATER POLLUTION KW - SW 3060:Water treatment and distribution KW - AQ 00004:Water Treatment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16141917?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=Changes+in+concentrations+of+triazine+and+acetamide+herbicides+by+bank+filtration%2C+ozonation%2C+and+chlorination+in+a+public+water+supply&rft.au=Verstraeten%2C+I+M%3BThurman%2C+E+M%3BLindsey%2C+ME%3BLee%2C+E+C%3BSmith%2C+R+D&rft.aulast=Verstraeten&rft.aufirst=I&rft.date=2002-09-01&rft.volume=266&rft.issue=3-4&rft.spage=190&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - SuppNotes - Special Issue: Attenuation of Groundwater Pollution By Bank Filtration. N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Filtration; Water treatment; Chlorination; Herbicides; Drinking water; Water supplies; Water pollution; Ozonation; Water supplies (Potable); Triazines; Bank filtration; Water Pollution; Drinking Water; Induced Infiltration; Path of Pollutants; Fate of Pollutants; Degradation Products; Water Treatment ER - TY - JOUR T1 - Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA AN - 16141130; 5446453 AB - Watersheds in mineralized zones may contain many mines, each of which can contribute to acidity and the metal load of a stream. In this study the authors delineate hydrogeologic characteristics determining the transport of metals from the watershed to the stream in the watershed of Cement Creek, Colorado. Combining the injection of a chemical tracer, to determine a discharge, with synoptic sampling, to obtain chemistry of major ions and metals, spatially detailed load profiles are quantified. Using the discharge and load profiles, the authors (1) identified sampled inflow sources which emanate from undisturbed as well as previously mined areas; (2) demonstrate, based on simple hydrologic balance, that unsampled, likely dispersed subsurface, inflows are significant; and (3) estimate attenuation. For example, along the 12-km study reach, 108 kg per day of Zn were added to Cement Creek. Almost half of this load came from 10 well-defined areas that included both mined and non-mined parts of the watershed. However, the combined effect of many smaller inflows also contributed a substantial load that could limit the effectiveness of remediation. Of the total Zn load, 58.3 kg/day came from stream segments with no visible inflow, indicating the importance of contributions from dispersed subsurface inflow. The subsurface inflow mostly occurred in areas with substantial fracturing of the bedrock or in areas downstream from tributaries with large alluvial fans. Despite a pH generally less than 4.5, there was 58.4 kg/day of Zn attenuation that occurred in mixing zones downstream from inflows with high pH. Mixing zones can have local areas of pH that are high enough for sorption and precipitation reactions to have an effect. Principal component analysis classified inflows into 7 groups with distinct chemical signatures that represent water-rock interaction with different mineral-alteration suites in the watershed. The present approach provides a detailed snapshot of metal load for the watershed to support remediation decisions, and quantifies processes affecting metal transport. JF - Applied Geochemistry AU - Kimball, BA AU - Runkel, R L AU - Walton-Day, K AU - Bencala, KE AD - US Geological Survey, Salt Lake City, UT 84104, USA, bkimball@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 1183 EP - 1207 VL - 17 IS - 9 SN - 0883-2927, 0883-2927 KW - USA, Colorado, Cement Creek KW - acid mine drainage KW - watersheds KW - Toxicology Abstracts; Sustainability Science Abstracts; Aqualine Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts KW - Catchment area KW - Acidic wastes KW - Water sampling KW - Path of Pollutants KW - Heavy metals KW - Mine drainage KW - Pollution dispersion KW - Watershed Management KW - Freshwater KW - Watersheds KW - Streams KW - Mine tailings KW - Tracers KW - Catchment areas KW - Zinc KW - Hydrology KW - Sampling KW - Tracer techniques KW - Acidity KW - Rivers KW - Metals KW - Acid Mine Drainage KW - Inflow KW - Fractures KW - Mining waste waters KW - Stream flow KW - USA, Colorado KW - Transport KW - Basement rock KW - Geohydrology KW - Mine Wastes KW - Mining KW - Q5 08503:Characteristics, behavior and fate KW - M3 1010:Issues in Sustainable Development KW - X 24166:Environmental impact KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16141130?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Assessment+of+metal+loads+in+watersheds+affected+by+acid+mine+drainage+by+using+tracer+injection+and+synoptic+sampling%3A+Cement+Creek%2C+Colorado%2C+USA&rft.au=Kimball%2C+BA%3BRunkel%2C+R+L%3BWalton-Day%2C+K%3BBencala%2C+KE&rft.aulast=Kimball&rft.aufirst=BA&rft.date=2002-09-01&rft.volume=17&rft.issue=9&rft.spage=1183&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Rivers; Catchment area; Water sampling; Heavy metals; Inflow; Pollution dispersion; Fractures; Mine tailings; Basement rock; Zinc; Hydrology; Mining; Tracer techniques; Metals; Tracers; Acidic wastes; Mine drainage; Watersheds; Streams; Catchment areas; Transport; Sampling; Acidity; Mining waste waters; Stream flow; Path of Pollutants; Acid Mine Drainage; Geohydrology; Mine Wastes; Watershed Management; USA, Colorado; Freshwater ER - TY - JOUR T1 - Lag times of bank filtration at a well field, Cincinnati, Ohio, USA AN - 16140839; 5465920 AB - Wells placed next to surface-water bodies to induce infiltration have come under scrutiny because of the presence of the potential pathogens in surface water. Removal of pathogens and other contaminants by bank filtration is assumed, but regulatory agencies question the effectiveness of this process. To investigate transport processes of biological constituents, advective groundwater traveltimes to production wells under the influence of surface water need to be established first to determine appropriate water-quality sampling schedules. This paper presents the results of a study of bank filtration at a well field in southwestern Ohio. Field parameters such as water level, specific conductance, and water temperature were measured at least hourly at a streamflow gaging station and at five monitoring wells each at two separate sites, corresponding to two nearby production wells. Water-quality samples also were collected in all wells and the streamflow gaging station. Specific conductance is directly related to concentration of chloride, a chemically conservative constituent. Cross-correlation methods were used to determine the average traveltime from the river to the monitoring wells. Traveltimes based on specific conductance ranged from approximately 20 h to 10 days at one site and 5 days to 3 months at the other site. Calculated groundwater flow velocities ranged from 2.1 x 10 super(-3) to 6.0 x 10 super(-3) cm/s and 3.5 x 10 super(-4) to 7.1 x 10 super(-4) cm/s at the two sites. Data collected when a production well is continuously pumping reveal shorter and more consistent traveltimes than when the same well is pumped intermittently. JF - Journal of Hydrology (Amsterdam) AU - Sheets, R A AU - Darner, R A AU - Whitteberry, B L AD - US Geological Survey, 6480 Doubletree Avenue, Columbus, OH 43229, USA, rasheets@usgs.gov Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 162 EP - 174 VL - 266 IS - 3-4 SN - 0022-1694, 0022-1694 KW - USA, Ohio, Cincinnati KW - Pollution Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Pollution monitoring KW - water quality KW - Surface water KW - Water Supply KW - Chlorides KW - transport processes KW - Flow rates KW - Wells (see also Boreholes) KW - Groundwater/surface water relationship KW - Water treatment KW - Hydrology KW - Bank filtration KW - Pumping KW - Data Collections KW - groundwater recharge KW - Induced Infiltration KW - Case Studies KW - Water Quality KW - Velocity KW - Pathogens KW - Traveltime KW - Filtration KW - water levels KW - Infiltration KW - Water wells KW - River Banks KW - USA, Ohio KW - Pathogenic organism KW - Groundwater KW - Groundwater Movement KW - water temperature KW - SW 2040:Groundwater management KW - P 2000:FRESHWATER POLLUTION KW - SW 3060:Water treatment and distribution KW - AQ 00004:Water Treatment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16140839?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=Lag+times+of+bank+filtration+at+a+well+field%2C+Cincinnati%2C+Ohio%2C+USA&rft.au=Sheets%2C+R+A%3BDarner%2C+R+A%3BWhitteberry%2C+B+L&rft.aulast=Sheets&rft.aufirst=R&rft.date=2002-09-01&rft.volume=266&rft.issue=3-4&rft.spage=162&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - SuppNotes - Special Issue: Attenuation of Groundwater Pollution By Bank Filtration. N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - water quality; Pollution monitoring; groundwater recharge; Surface water; Chlorides; transport processes; Velocity; Pathogens; Flow rates; Filtration; water levels; Infiltration; Hydrology; Water wells; Groundwater; water temperature; Groundwater/surface water relationship; Water treatment; Pumping; Bank filtration; Pathogenic organism; Wells (see also Boreholes); Induced Infiltration; Case Studies; Water Quality; Water Supply; River Banks; Traveltime; Groundwater Movement; Data Collections; USA, Ohio ER - TY - JOUR T1 - A Monitoring Protocol to Assess Tidal Restoration of Salt Marshes on Local and Regional Scales AN - 16136015; 5443026 AB - Assessing the response of salt marshes to tidal restoration relies on comparisons of ecosystem attributes between restored and reference marshes. Although this approach provides an objective basis for judging project success, inferences can be constrained if the high variability of natural marshes masks differences in sampled attributes between restored and reference sites. Furthermore, such assessments are usually focused on a small number of restoration projects in a local area, limiting the ability to address questions regarding the effectiveness of restoration within a broad region. We developed a hierarchical approach to evaluate the performance of tidal restorations at local and regional scales throughout the Gulf of Maine. The cornerstone of the approach is a standard protocol for monitoring restored and reference salt marshes throughout the region. The monitoring protocol was developed by consensus among nearly 50 restoration scientists and practitioners. The protocol is based on a suite of core structural measures that can be applied to any tidal restoration project. The protocol also includes additional functional measures for application to specific projects. Consistent use of the standard protocol to monitor local projects will enable pooling information for regional assessments. Ultimately, it will be possible to establish a range of reference conditions characterizing natural tidal wetlands in the region and to compare performance curves between populations of restored and reference marshes for assessing regional restoration effectiveness. JF - Restoration Ecology AU - Neckles, HA AU - Dionne, M AU - Burdick, D M AU - Roman, C T AU - Buchsbaum, R AU - Hutchins, E AD - USGS Patuxent Wildlife Research Center , Augusta, ME, U.S.A. Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 556 EP - 563 PB - Blackwell Science Ltd VL - 10 IS - 3 SN - 1061-2971, 1061-2971 KW - Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Environmental monitoring KW - Marine KW - Salt Marshes KW - Variability KW - Coastal environments KW - ANW, USA, Maine Gulf KW - Brackish KW - Marshes KW - Performance assessment KW - Gulfs KW - Tidal effects KW - Tides KW - Restoration KW - Coastal zone management KW - Performance Evaluation KW - Assessments KW - Salt marshes KW - Ecosystem management KW - Environmental restoration KW - Standards KW - Wetlands KW - Monitoring KW - Q5 08523:Conservation, wildlife management and recreation KW - Q1 08482:Ecosystems and energetics KW - SW 0540:Properties of water KW - D 04210:Coastal ecosystems KW - D 04715:Reclamation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16136015?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Restoration+Ecology&rft.atitle=A+Monitoring+Protocol+to+Assess+Tidal+Restoration+of+Salt+Marshes+on+Local+and+Regional+Scales&rft.au=Neckles%2C+HA%3BDionne%2C+M%3BBurdick%2C+D+M%3BRoman%2C+C+T%3BBuchsbaum%2C+R%3BHutchins%2C+E&rft.aulast=Neckles&rft.aufirst=HA&rft.date=2002-09-01&rft.volume=10&rft.issue=3&rft.spage=556&rft.isbn=&rft.btitle=&rft.title=Restoration+Ecology&rft.issn=10612971&rft_id=info:doi/10.1046%2Fj.1526-100X.2002.02033.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-01-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Environmental monitoring; Salt marshes; Ecosystem management; Performance assessment; Tidal effects; Coastal zone management; Restoration; Coastal environments; Environmental restoration; Tides; Variability; Performance Evaluation; Salt Marshes; Assessments; Wetlands; Standards; Marshes; Monitoring; Gulfs; ANW, USA, Maine Gulf; Brackish; Marine DO - http://dx.doi.org/10.1046/j.1526-100X.2002.02033.x ER - TY - JOUR T1 - Quantifying Vegetation and Nekton Response to Tidal Restoration of a New England Salt Marsh AN - 16135994; 5443018 AB - Tidal flow to salt marshes throughout the northeastern United States is often restricted by roads, dikes, impoundments, and inadequately sized culverts or bridge openings, resulting in altered ecological structure and function. In this study we evaluated the response of vegetation and nekton (fishes and decapod crustaceans) to restoration of full tidal flow to a portion of the Sachuest Point salt marsh, Middletown, Rhode Island. A before, after, control, impact study design was used, including evaluations of the tide-restricted marsh, the same marsh after reintroduction of tidal flow (i.e., tide-restored marsh), and an unrestricted control marsh. Before tidal restoration vegetation of the 3.7-ha tide-restricted marsh was dominated by Phragmites australis and was significantly different from the adjacent 6.3-ha Spartina-dominated unrestricted control marsh (analysis of similarities randomization test, p < 0.001). After one growing season vegetation of the tide-restored marsh had changed from its pre-restoration condition (analysis of similarities randomization test, p < 0.005). Although not similar to the unrestricted control marsh, Spartina patens and S. alterniflora abundance increased and abundance and height of Phragmites significantly declined, suggesting a convergence toward typical New England salt marsh vegetation. Before restoration shallow water habitat (creeks and pools) of the unrestricted control marsh supported a greater density of nekton compared with the tide-restricted marsh (analysis of variance, p < 0.001), but after one season of restored tidal flow nekton density was equivalent. A similar trend was documented for nekton species richness. Nekton density and species richness from marsh surface samples were similar between the tide-restored marsh and unrestricted control marsh. Fundulus heteroclitus and Palaemonetes pugio were the numerically dominant fish and decapod species in all sampled habitats. This study provides an example of a quantitative approach for assessing the response of vegetation and nekton to tidal restoration. JF - Restoration Ecology AU - Roman, C T AU - Raposa, K B AU - Adamowicz, S C AU - James-Pirri, M AU - Catena, J G AD - USGS Patuxent Wildlife Research Center , University of Rhode Island, Narragansett, RI 02882, U.S.A. Y1 - 2002/09// PY - 2002 DA - Sep 2002 SP - 450 EP - 460 PB - Blackwell Science Ltd VL - 10 IS - 3 SN - 1061-2971, 1061-2971 KW - Daggerblade grass shrimp KW - Mummichog KW - Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Palaemonetes pugio KW - USA, Rhode Island, Sachuest Point KW - Aquatic macrophytes (Gramineae) KW - Coastal environments KW - Species Diversity KW - Shallow Water KW - Restoration KW - Vegetation cover KW - USA, New England KW - ANW, USA, Rhode Island, Sachuest Point KW - Spartina alterniflora KW - Testing Procedures KW - Fundulus heteroclitus KW - Salt Marshes KW - USA, Rhode Island KW - Spartina patens KW - Density KW - Environmental impact KW - Brackish KW - Vegetation KW - Marshes KW - Tides KW - Tidal currents KW - Nekton KW - ecosystem resilience KW - Community composition KW - Salt marshes KW - Habitat improvement KW - Phragmites australis KW - Environmental restoration KW - Fish KW - Q1 08463:Habitat community studies KW - SW 6010:Structures KW - Q5 08522:Protective measures and control KW - D 04715:Reclamation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16135994?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Restoration+Ecology&rft.atitle=Quantifying+Vegetation+and+Nekton+Response+to+Tidal+Restoration+of+a+New+England+Salt+Marsh&rft.au=Roman%2C+C+T%3BRaposa%2C+K+B%3BAdamowicz%2C+S+C%3BJames-Pirri%2C+M%3BCatena%2C+J+G&rft.aulast=Roman&rft.aufirst=C&rft.date=2002-09-01&rft.volume=10&rft.issue=3&rft.spage=450&rft.isbn=&rft.btitle=&rft.title=Restoration+Ecology&rft.issn=10612971&rft_id=info:doi/10.1046%2Fj.1526-100X.2002.01036.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-01-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Nekton; Vegetation cover; Community composition; Salt marshes; Habitat improvement; Environmental impact; Restoration; Tidal currents; ecosystem resilience; Coastal environments; Environmental restoration; Tides; Testing Procedures; Salt Marshes; Aquatic macrophytes (Gramineae); Density; Vegetation; Species Diversity; Fish; Marshes; Shallow Water; Spartina alterniflora; Palaemonetes pugio; Fundulus heteroclitus; Spartina patens; Phragmites australis; USA, Rhode Island, Sachuest Point; USA, Rhode Island; USA, New England; ANW, USA, Rhode Island, Sachuest Point; Brackish DO - http://dx.doi.org/10.1046/j.1526-100X.2002.01036.x ER - TY - JOUR T1 - Binding of mercury(II) to dissolved organic matter: the role of the mercury-to-DOM concentration ratio. AN - 72066172; 12214650 AB - The binding of Hg(II) to dissolved organic matter (DOM; hydrophobic acids isolated from the Florida Everglades by XAD-8 resin) was measured at a wide range of Hg-to-DOM concentration ratios using an equilibrium dialysis ligand exchange method. Conditional distribution coefficients (K(DOM)') determined by this method were strongly affected by the Hg/DOM concentration ratio. At Hg/DOM ratios below approximately 1 microg of Hg/mg of DOM, we observed very strong interactions (K(DOM)' = 10(23.2+/-1.0) L kg(-1) at pH = 7.0 and I = 0.1), indicative of mercury-thiol bonds. Hg/DOM ratios above approximately 10 microg of Hg/mg of DOM, as used in most studies that have determined Hg-DOM binding constants, gave much lower K(DOM)' values (10(10.7+/-1.0) L kg(-1) at pH = 4.9-5.6 and I = 0.1), consistent with Hg binding mainly to oxygen functional groups. These results suggest that the binding of Hg to DOM under natural conditions (very low Hg/DOM ratios) is controlled by a small fraction of DOM molecules containing a reactive thiol functional group. Therefore, Hg/DOM distribution coefficients used for modeling the biogeochemical behavior of Hg in natural systems need to be determined at low Hg/DOM ratios. JF - Environmental science & technology AU - Haitzer, Markus AU - Aiken, George R AU - Ryan, Joseph N AD - U.S. Geological Survey, Water Resources Division, Boulder, Colorado 80303, USA. mhaitzer@usgs.gov Y1 - 2002/08/15/ PY - 2002 DA - 2002 Aug 15 SP - 3564 EP - 3570 VL - 36 IS - 16 SN - 0013-936X, 0013-936X KW - Organic Chemicals KW - 0 KW - Water Pollutants KW - Water KW - 059QF0KO0R KW - Mercury KW - FXS1BY2PGL KW - Index Medicus KW - Kinetics KW - Water -- chemistry KW - Water Pollutants -- analysis KW - Models, Chemical KW - Mercury -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72066172?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Binding+of+mercury%28II%29+to+dissolved+organic+matter%3A+the+role+of+the+mercury-to-DOM+concentration+ratio.&rft.au=Haitzer%2C+Markus%3BAiken%2C+George+R%3BRyan%2C+Joseph+N&rft.aulast=Haitzer&rft.aufirst=Markus&rft.date=2002-08-15&rft.volume=36&rft.issue=16&rft.spage=3564&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-01-29 N1 - Date created - 2002-09-06 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Lead distribution throughout soil, flora, and an invertebrate at a wetland skeet range. AN - 71985211; 12167221 AB - Lead pellets from a skeet range impart Pb to the local soil, plants, and animals. Concentrations and distributions of Pb in the various media were studied at the now-abandoned skeet range bordering a cordgrass marsh at the Naval Weapons Station Seal Beach in Southern California. The concentrations of Pb in soil (maximum = 16,200 ppm, dry mass) are significantly correlated to the shot pellet densities. Lead concentrations in plants vary according to species' abilities to inhibit Pb uptake from soil. Horn snails had a mean Pb concentration (1987 ppm, dry mass) over 100 times greater than the leaves of the plant species with the highest mean concentration (18.1 ppm, dry mass) at the same site. Avian predators of gastropods may receive minimum exposure to Pb due to calcium in the shells, but incidental ingestion of soil in addition to direct ingestion of shot pellets may provide significant exposure to birds. Because shotgun pellets may persist in wetland soil for 300 yr, reduction of wildlife exposure to Pb in such cases requires deliberate action. JF - Journal of toxicology and environmental health. Part A AU - Hui, Clifford A AD - USGS Western Ecological Research Center, Davis Field Station, Davis, California, USA. cliff_hui@usgs.gov Y1 - 2002/08/09/ PY - 2002 DA - 2002 Aug 09 SP - 1093 EP - 1107 VL - 65 IS - 15 SN - 1528-7394, 1528-7394 KW - Soil Pollutants KW - 0 KW - Lead KW - 2P299V784P KW - Index Medicus KW - Environment KW - Animals KW - Snails -- metabolism KW - Food Chain KW - Spectrophotometry, Atomic KW - Plant Leaves -- chemistry KW - Quality Control KW - Plants -- chemistry KW - Firearms KW - Invertebrates -- chemistry KW - Lead -- metabolism KW - Lead -- analysis KW - Soil Pollutants -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71985211?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+toxicology+and+environmental+health.+Part+A&rft.atitle=Lead+distribution+throughout+soil%2C+flora%2C+and+an+invertebrate+at+a+wetland+skeet+range.&rft.au=Hui%2C+Clifford+A&rft.aulast=Hui&rft.aufirst=Clifford&rft.date=2002-08-09&rft.volume=65&rft.issue=15&rft.spage=1093&rft.isbn=&rft.btitle=&rft.title=Journal+of+toxicology+and+environmental+health.+Part+A&rft.issn=15287394&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-28 N1 - Date created - 2002-08-08 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Effects of surface run-off on the transport of agricultural chemicals to ground water in a sandplain setting AN - 16137878; 5454749 AB - An experiment was conducted at a depressional (lowland) and an upland site in sandy soils to evaluate the effects of surface run-off on the transport of agricultural chemicals to ground water. Approximately 16.5 cm of water was applied to both sites during the experiment, representing a natural precipitation event with a recurrence interval of approximately 100 years. Run-off was quantified at the lowland site and was not detected at the upland site during the experiment. Run-off of water to the lowland site was the most important factor affecting differences in the concentrations and fluxes of the agricultural chemicals between the two sites. Run-off of water to the lowland site appears to have played a dual role by diluting chemical concentrations in the unsaturated zone as well as increasing the concentrations at the water table, compared to the upland site. Concentrations of chloride, nitrate and atrazine plus metabolites were noticeably greater at the water table than in the unsaturated zone at both sites. The estimated mass flux of chloride and nitrate to the water table during the test were 5-2 times greater, respectively, at the lowland site compared to the upland site, whereas the flux of sulfate and atrazine plus metabolites was slightly greater at the upland site. Results indicate that matrix flow of water and chemicals was the primary process causing the observed differences between the two sites. Results of the experiment illustrate the effects of heterogeneity and the complexity of evaluating chemical transport through the unsaturated zone. JF - Science of the Total Environment AU - Delin, G N AU - Landon, M K AD - US Geological Survey, 2280 Woodale Drive, Mounds View, MN 55112, USA, delin@usgs.gov Y1 - 2002/08/05/ PY - 2002 DA - 2002 Aug 05 SP - 143 EP - 155 VL - 295 IS - 1-3 SN - 0048-9697, 0048-9697 KW - Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Aqualine Abstracts; Pollution Abstracts KW - Agriculture KW - Nitrate KW - Agricultural Runoff KW - Water Pollution Sources KW - Chlorides KW - Water table KW - Groundwater Pollution KW - Agricultural Chemicals KW - Sand KW - Hydrology KW - Marine KW - Agricultural chemicals KW - Nitrates KW - Agrochemicals KW - Transport KW - Atrazine KW - Groundwater (see also Aquifers) KW - Groundwater pollution KW - Pollution (Water) KW - Runoff KW - Q5 08503:Characteristics, behavior and fate KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16137878?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+of+the+Total+Environment&rft.atitle=Effects+of+surface+run-off+on+the+transport+of+agricultural+chemicals+to+ground+water+in+a+sandplain+setting&rft.au=Delin%2C+G+N%3BLandon%2C+M+K&rft.aulast=Delin&rft.aufirst=G&rft.date=2002-08-05&rft.volume=295&rft.issue=1-3&rft.spage=143&rft.isbn=&rft.btitle=&rft.title=Science+of+the+Total+Environment&rft.issn=00489697&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-01-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Agriculture; Chlorides; Groundwater pollution; Water table; Runoff; Nitrates; Sand; Atrazine; Hydrology; Agrochemicals; Nitrate; Agricultural chemicals; Transport; Groundwater (see also Aquifers); Pollution (Water); Agricultural Runoff; Agricultural Chemicals; Water Pollution Sources; Groundwater Pollution; Marine ER - TY - JOUR T1 - Effects of tidal shallowing and deepening on phytoplankton production dynamics: A modeling study AN - 968178534; 16466759 AB - Processes influencing estuarine phytoplankton growth occur over a range of time scales, but many conceptual and numerical models of estuarine phytoplankton production dynamics neglect mechanisms occurring on the shorter (e.g., intratidal) time scales. We used a numerical model to explore the influence of short time-scale variability in phytoplankton sources and sinks on long-term growth in an idealized water column that shallows and deepens with the semidiurnal tide. Model results show that tidal fluctuations in water surface elevation can determine whether long-term phytoplankton growth is positive or negative. Hourly-scale interactions influencing weekly-scale to monthly-scale phytoplankton dynamics include intensification of the depth-averaged benthic grazing effect by water column shallowing and enhancement of water column photosynthesis when solar noon coincides with low tide. Photosynthesis and benthic consumption may modulate over biweekly time scales due to spring-neap fluctuations in tidal range and the 15-d cycle of solar noon-low tide phasing. If tidal range is a large fraction of mean water depth, then tidal shallowing and deepening may significantly influence net phytoplankton growth. In such a case, models or estimates of long-term phytoplankton production dynamics that neglect water surface fluctuations may overestimate or underestimate net growth and could even predict the wrong sign associated with net growth rate. JF - Estuaries AU - Lucas, Lisa V AU - Cloern, James E AD - U.S. Geological Survey, 345 Middlefield Road, MS 496, 94025, Menlo Park, California, llucas@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 497 EP - 507 PB - Estuarine Research Federation, 490 Chippingwood Dr. Port Republic MD 20676-2140 United States VL - 25 IS - 4 SN - 0160-8347, 0160-8347 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Water Resources Abstracts; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Photosynthesis KW - Sinks KW - Phytoplankton KW - Primary production KW - Water column KW - Models KW - Brackishwater environment KW - Growth rate KW - Mathematical models KW - Grazing KW - Estuaries KW - Brackish KW - Growth Rates KW - Tides KW - Model Studies KW - Tidal Range KW - Tidal range KW - Elevation KW - Tidal models KW - Fluctuations KW - O 1070:Ecology/Community Studies KW - Q1 08463:Habitat community studies KW - SW 0890:Estuaries KW - K 03320:Cell Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/968178534?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Estuaries&rft.atitle=Effects+of+tidal+shallowing+and+deepening+on+phytoplankton+production+dynamics%3A+A+modeling+study&rft.au=Lucas%2C+Lisa+V%3BCloern%2C+James+E&rft.aulast=Lucas&rft.aufirst=Lisa&rft.date=2002-08-01&rft.volume=25&rft.issue=4&rft.spage=497&rft.isbn=&rft.btitle=&rft.title=Estuaries&rft.issn=01608347&rft_id=info:doi/10.1007%2FBF02804885 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2012-04-01 N1 - Last updated - 2014-05-02 N1 - SubjectsTermNotLitGenreText - Growth rate; Mathematical models; Tidal range; Grazing; Estuaries; Brackishwater environment; Phytoplankton; Tidal models; Primary production; Photosynthesis; Tides; Water column; Models; Tidal Range; Elevation; Sinks; Growth Rates; Fluctuations; Model Studies; Brackish DO - http://dx.doi.org/10.1007/BF02804885 ER - TY - JOUR T1 - Nineteenth century mercury: hazard to wading birds and cormorants of the Carson River, Nevada. AN - 72050774; 12211695 AB - Contemporary mercury interest relates to atmospheric deposition, contaminated fish stocks and exposed fish-eating wildlife. The focus is on methylmercury (MeHg) even though most contamination is of inorganic (IoHg) origin. However, IoHg is readily methylated in aquatic systems to become more hazardous to vertebrates. In response to a classic episode of historical (1859-1890) IoHg contamination, we studied fish-eating birds nesting along the lower Carson River, Nevada. Adult double-crested cormorants (Phalacrocorax auritus), snowy egrets (Egretta thula) and black-crowned night-herons (Nycticorax nycticorax) contained very high concentrations of total mercury (THg) in their livers (geo. means 134.8 microg/g wet weight (ww), 43.7 and 13.5, respectively) and kidneys (69.4, 11.1 and 6.1, respectively). Apparently tolerance of these concentrations was possible due to a threshold-dependent demethylation coupled with sequestration of resultant IoHg. Demethylation and sequestration processes also appeared to have reduced the amount of MeHg redistributed to eggs. However, the relatively short time spent by adults in the contaminated area before egg laying was also a factor in lower than expected concentrations of mercury in eggs. Most eggs (100% MeHg) had concentrations below 0.80 microg/g ww, the putative threshold concentration where reproductive problems may be expected; there was no conclusive evidence of mercury-related depressed hatchability. After hatching, the young birds were fed diets by their parents averaging 0.36-1.18 microgMeHg/g ww through fledging. During this four to six week period, accumulated mercury concentrations in the organs of the fledglings were much lower than found in adults, but evidence was detected of toxicity to their immune (spleen, thymus, bursa), detoxicating (liver, kidneys) and nervous systems. Several indications of oxidative stress were also noted in the fledglings and were most apparent in young cormorants containing highest concentrations of mercury. This stress was evidenced by increased thiobarbituric acid-reactive substances, low activities of enzymes related to glutathione metabolism and low levels of reduced thiols, plus an increase in the ratio of oxidized to reduced glutathione. At lower concentrations of mercury, as was found in young egrets, we observed elevated activities of protective hepatic enzymes, which could help reduce oxidative stress. Immune deficiencies and neurological impairment of fledglings may affect survivability when confronted with the stresses of learning to forage and the ability to complete their first migration. JF - Ecotoxicology (London, England) AU - Henny, Charles J AU - Hill, Elwood F AU - Hoffman, David J AU - Spalding, Marilyn G AU - Grove, Robert A AD - USGS-Forest and Rangeland Ecosystem Science Center, Corvallis, Oregon 97331, USA. charles_j_henny@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 213 EP - 231 VL - 11 IS - 4 SN - 0963-9292, 0963-9292 KW - Water Pollutants, Chemical KW - 0 KW - Mercury KW - FXS1BY2PGL KW - Index Medicus KW - Environmental Monitoring KW - Animals KW - Feathers -- chemistry KW - Fresh Water KW - Nesting Behavior KW - Eggs -- analysis KW - Reproduction KW - Nevada KW - Birds -- metabolism KW - Water Pollutants, Chemical -- analysis KW - Mercury -- analysis KW - Environmental Exposure -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72050774?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecotoxicology+%28London%2C+England%29&rft.atitle=Nineteenth+century+mercury%3A+hazard+to+wading+birds+and+cormorants+of+the+Carson+River%2C+Nevada.&rft.au=Henny%2C+Charles+J%3BHill%2C+Elwood+F%3BHoffman%2C+David+J%3BSpalding%2C+Marilyn+G%3BGrove%2C+Robert+A&rft.aulast=Henny&rft.aufirst=Charles&rft.date=2002-08-01&rft.volume=11&rft.issue=4&rft.spage=213&rft.isbn=&rft.btitle=&rft.title=Ecotoxicology+%28London%2C+England%29&rft.issn=09639292&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-01-23 N1 - Date created - 2002-09-04 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Toxicity assessment of sediments from the Grand Calumet River and Indiana Harbor Canal in Northwestern Indiana, USA. AN - 71891643; 12115041 AB - The objective of this study was to evaluate the toxicity of sediments from the Grand Calumet River and Indiana Harbor Canal located in northwestern Indiana, USA. Toxicity tests used in this assessment included 10-day sediment exposures with the amphipod Hyalella azteca, 31-day sediment exposures with the oligochaete Lumbriculus variegatus, and the Microtox Solid-Phase Sediment Toxicity Test. A total of 30 sampling stations were selected in locations that had limited historic matching toxicity and chemistry data. Toxic effects on amphipod survival were observed in 60% of the samples from the assessment area. Results of a toxicity test with oligochaetes indicated that sediments from the assessment area were too toxic to be used in proposed bioaccumulation testing. Measurement of amphipod length after the 10-day exposures did not provide useful information beyond that provided by the survival endpoint. Seven of the 15 samples that were identified as toxic in the amphipod tests were not identified as toxic in the Microtox test, indicating that the 10-day H. azteca test was more sensitive than the Microtox test. Samples that were toxic tended to have the highest concentrations of metals, polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyls (PCBs). The toxic samples often had an excess of simultaneously extracted metals (SEM) relative to acid volatile sulfide (AVS) and had multiple exceedances of probable effect concentrations (PECs). Metals may have contributed to the toxicity of samples that had both an excess molar concentration of SEM relative to AVS and elevated concentrations of metals in pore water. However, of the samples that had an excess of SEM relative to AVS, only 38% of these samples had elevated concentration of metals in pore water. The lack of correspondence between SEM-AVS and pore water metals indicates that there are variables in addition to AVS controlling the concentrations of metals in pore water. A mean PEC quotient of 3.4 (based on concentrations of metals, PAHs, and PCBs) was exceeded in 33% of the sediment samples and a mean quotient of 0.63 was exceeded in 70% of the thirty sediment samples from the assessment area. A 50% incidence of toxicity has been previously reported in a database for sediment tests with H. azteca at a mean quotient of 3.4 in 10-day exposures and at a mean quotient of 0.63 in 28-day exposures. Among the Indiana Harbor samples, most of the samples with a mean PEC quotient above 0.63 ( i.e., 15 of 21; 71%) and above 3.4 ( i.e., 10 of 10; 100%) were toxic to amphipods. Results of this study and previous studies demonstrate that sediments from this assessment area are among the most contaminated and toxic that have ever been reported. JF - Archives of environmental contamination and toxicology AU - Ingersoll, C G AU - MacDonald, D D AU - Brumbaugh, W G AU - Johnson, B T AU - Kemble, N E AU - Kunz, J L AU - May, T W AU - Wang, N AU - Smith, J R AU - Sparks, D W AU - Ireland, D S AD - Columbia Environmental Research Center, U.S. Geological Survey, 4200 New Haven Road, Columbia, Missouri 65201, USA. chris_ingersoll@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 156 EP - 167 VL - 43 IS - 2 SN - 0090-4341, 0090-4341 KW - Metals, Heavy KW - 0 KW - Water Pollutants, Chemical KW - Index Medicus KW - Animals KW - Indiana KW - Toxicity Tests KW - Databases, Factual KW - Environmental Monitoring KW - Geologic Sediments -- chemistry KW - Water Pollutants, Chemical -- toxicity KW - Crustacea KW - Metals, Heavy -- toxicity KW - Oligochaeta UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71891643?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Archives+of+environmental+contamination+and+toxicology&rft.atitle=Toxicity+assessment+of+sediments+from+the+Grand+Calumet+River+and+Indiana+Harbor+Canal+in+Northwestern+Indiana%2C+USA.&rft.au=Ingersoll%2C+C+G%3BMacDonald%2C+D+D%3BBrumbaugh%2C+W+G%3BJohnson%2C+B+T%3BKemble%2C+N+E%3BKunz%2C+J+L%3BMay%2C+T+W%3BWang%2C+N%3BSmith%2C+J+R%3BSparks%2C+D+W%3BIreland%2C+D+S&rft.aulast=Ingersoll&rft.aufirst=C&rft.date=2002-08-01&rft.volume=43&rft.issue=2&rft.spage=156&rft.isbn=&rft.btitle=&rft.title=Archives+of+environmental+contamination+and+toxicology&rft.issn=00904341&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-09-06 N1 - Date created - 2002-07-12 N1 - Date revised - 2017-01-13 N1 - SuppNotes - Comment In: Arch Environ Contam Toxicol. 2002 Aug;43(2):127-9 [12115038] N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Fate and effects of the triazinone herbicide metribuzin in experimental pond mesocosms. AN - 71889186; 12115045 AB - Metribuzin is a triazinone herbicide that is widely used for the control of grasses and broad-leaved weeds in soybeans, sugarcane, and numerous other crops. Metribuzin is highly toxic to freshwater macrophytes and algae under laboratory conditions (median plant EC(50) = 31 microg/L; n = 11 species) but has not been studied under controlled outdoor conditions. We conducted a 6-week study to examine the aquatic fate and effects of metribuzin in 0.1-ha outdoor aquatic mesocosms. Mesocosms (n = 2 per treatment) were treated with metribuzin at one of five concentrations: 0, 9, 19, 38, or 75 microg/L. Concentrations were selected to bracket known laboratory effect concentrations and to reflect calculated edge-of-field concentrations. The dissipation half-life of metribuzin in water was 5 days. Metribuzin had no statistically significant effects on water quality, periphyton biomass, macrophyte biomass, macrophyte species composition, fish survival, or fish growth at treatment levels ranging up to and including 75 microg/L. Although metribuzin is highly toxic to freshwater macrophytes and algae under laboratory conditions, it poses little risk to nontarget aquatic plants due to the short aqueous dissipation half-life. The findings also demonstrate that current herbicide risk assessment procedures used in the registration process could benefit from empirical assessments of the fate of chemicals under realistic environmental conditions. JF - Archives of environmental contamination and toxicology AU - Fairchild, J F AU - Sappington, L C AD - U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Rd., Columbia, Missouri 65201, USA. james_fairchild@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 198 EP - 202 VL - 43 IS - 2 SN - 0090-4341, 0090-4341 KW - Herbicides KW - 0 KW - Triazines KW - Water Pollutants, Chemical KW - metribuzin KW - QO836138OV KW - Index Medicus KW - Ecosystem KW - Plants -- chemistry KW - Animals KW - Half-Life KW - Eukaryota -- chemistry KW - Population Dynamics KW - Fishes KW - Eukaryota -- drug effects KW - Plants -- drug effects KW - Biomass KW - Risk Assessment KW - Triazines -- toxicity KW - Triazines -- analysis KW - Herbicides -- pharmacokinetics KW - Water Pollutants, Chemical -- analysis KW - Herbicides -- analysis KW - Water Pollutants, Chemical -- toxicity KW - Water Pollutants, Chemical -- pharmacokinetics KW - Triazines -- pharmacokinetics KW - Herbicides -- toxicity UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71889186?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Archives+of+environmental+contamination+and+toxicology&rft.atitle=Fate+and+effects+of+the+triazinone+herbicide+metribuzin+in+experimental+pond+mesocosms.&rft.au=Fairchild%2C+J+F%3BSappington%2C+L+C&rft.aulast=Fairchild&rft.aufirst=J&rft.date=2002-08-01&rft.volume=43&rft.issue=2&rft.spage=198&rft.isbn=&rft.btitle=&rft.title=Archives+of+environmental+contamination+and+toxicology&rft.issn=00904341&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-09-06 N1 - Date created - 2002-07-12 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Economic prefeasibility studies of mining in the Stikine area, Southeast Alaska AN - 52007669; 2003-025692 JF - BLM - Alaska Technical Report AU - Coldwell, James R Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 33 EP - 33, 2 sheets PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - Type: site location map KW - Type: economic geology map KW - United States KW - mining KW - molybdenum ores KW - Southeastern Alaska KW - optimization KW - site location maps KW - mineral economics KW - production KW - feasibility studies KW - massive sulfide deposits KW - Stikine Alaska KW - maps KW - land management KW - metal ores KW - polymetallic ores KW - gold ores KW - copper ores KW - tonnage KW - massive deposits KW - economic geology maps KW - Alaska KW - 27B:Economic geology, economics of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52007669?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Coldwell%2C+James+R&rft.aulast=Coldwell&rft.aufirst=James&rft.date=2002-08-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Economic+prefeasibility+studies+of+mining+in+the+Stikine+area%2C+Southeast+Alaska&rft.title=Economic+prefeasibility+studies+of+mining+in+the+Stikine+area%2C+Southeast+Alaska&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 61 N1 - PubXState - AK N1 - Document feature - illus. incl. 4 tables N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - Alaska; copper ores; economic geology maps; feasibility studies; gold ores; land management; maps; massive deposits; massive sulfide deposits; metal ores; mineral economics; mining; molybdenum ores; optimization; polymetallic ores; production; site location maps; Southeastern Alaska; Stikine Alaska; tonnage; United States ER - TY - JOUR T1 - Effects of topography on the transport of agricultural chemicals to groundwater in a sand-plain setting. AN - 27126738; 200211-34-0708 (CE); 05747786 (EN) AB - Geochemical data were collected to investigate the effects of topography and focused recharge on the transport of agricultural chemicals to groundwater through sandy soils. The research was done at a topographically high (upland) site and a depressional (lowland) site within a corn field. Agricultural chemicals that move readily with water were most directly affected by focused recharge to the lowland site. Surface runoff of water to the lowland site was the primary cause for the generally greater flux of chloride, nitrate nitrogen, and sulfate compared with the upland site. Based on data from the unsaturated zone, for example, the average annual fluxes of these chemicals in 1992-1993 were 5.1, 3.4, and 1.7 times greater, respectively, at the lowland site. Study results indicate that consideration should be given to modifying site-specific management farming technology to account for varying recharge rates in different topographic settings. By reducing chemical application rates in topographic depressions, where focused recharge of chemicals occurs because of surface runoff, farmers could improve ground-water quality as well as reduce expenditures for agricultural chemicals. [Foreign Abstract: Des donnees geochimiques ont ete recueillies dans le but d'analyser les effets de la topographie et de la recharge concentree sur le transport des produits chimiques, utilises en agriculture, vers les nappes au travers de sols sableux. Cette etude a ete realisee dans un secteur topographiquement eleve et dans un secteur en depression, sur des cultures de ble. Les produits chimiques agricoles qui se deplacent facilement avec l'eau ont ete le plus directement concernes par la recharge concentree dans la zone deprimee. le ruissellement de l'eau dans la zone deprimee a ete la cause primaire du flux generalement plus important de chlorure, d'azote du nitrate et de sulfate par comparaison avec la zone elevee. En s'appuyant sur les donnees fournies par la zone non saturee, par exemple, les flux moyens annuels de ces substances en 1992-1993 ont ete respectivement 5,1, 3,4 et 1,7 fois plus eleves dans le secteur en depression. Les resultats de l'etude montrent qu'il faut preter attention aux modifications des pratiques culturales de gestion de sites specifiques en prenant en compte les taux variables de recharge selon les situations topographiques. En reduisant les taux d'application de substances chimiques dans les depressions topographiques, ou se produit la recharge concentree des produits du fait du ruissellement, les agriculteurs peuvent ameliorer la qualite des eaux souterraines tout en reduisant leurs depenses pour ces produits. Additional abstract: Se ha recogido datos geoquimicos para investigar los efectos de la topografia y de la recarga localizada en el transporte de compuestos quimicos de origen agricola a traves de suelos arenosos hacia las aguas subterraneas. el estudio se ha llevado a cabo en dos emplazamientos situados en un campo de maiz; el primero, en un alto topografico; el segundo, en una depresion. Los compuestos que se desplazan rapidamente con el agua son los mas afectados por la recarga localizada hacia la depresion. La escorrentia superficial hacia esta es la causa principal de un flujo mayor de cloruro, nitrogeno nitrico y sulfato que en el punto topograficamente elevado. Con base en los datos de la zona no saturada, por ejemplo, el promedio anual de flujo de los compuestos citados fue 5,1; 3,4 y 1,7 veces mayor, respectivamente, en la depresion. Los resultados indican que se deberia prestar atencion a cualquier cambio en las tecnologias de gestion agricola a la hora de evaluar modificaciones de las tasas de recarga en diferentes puntos topograficos. Reduciendo la aplicacion de compuestos quimicos en las depresiones, donde la recarga se acentua por la escorrentia superficial, los agricultores podrian mejorar la calidad de las aguas subterraneas a la par que reducir los gastos en compuestos quimicos.] JF - Hydrogeology Journal AU - Delin, G N AU - Landon, M K AD - US Geological Survey, 2280 Woodale Drive, Mounds View, MN 55112, USA delin@usgs.gov PY - 2002 SP - 443 EP - 454 PB - Springer-Verlag (Austria), Sachsenplatz 46, P.O. Box 89, Vienna, A-1201, Austria, [URL:http://www.link.springer-ny.com] VL - 10 IS - 4 SN - 1431-2174, 1431-2174 KW - Civil Engineering (CE); Environmental Engineering (EN) KW - Groundwater KW - Agricultural chemicals KW - Hydrogeology KW - Hydrology KW - Lowlands KW - Topography KW - Runoff KW - Farming KW - Geochemistry KW - Sandy soils KW - Sand (material) KW - Article KW - EE 40:Water Pollution: Monitoring, Control & Remediation (EN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/27126738?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Effects+of+topography+on+the+transport+of+agricultural+chemicals+to+groundwater+in+a+sand-plain+setting.&rft.au=Delin%2C+G+N%3BLandon%2C+M+K&rft.aulast=Delin&rft.aufirst=G&rft.date=2002-08-01&rft.volume=10&rft.issue=4&rft.spage=443&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Number of references - 45 N1 - Document feature - Graphs N1 - Last updated - 2011-11-11 ER - TY - JOUR T1 - Long-term dynamics of winter and summer annual communities in the Chihuahuan Desert AN - 19767918; 5673319 AB - Winter and summer annuals in the Chihuahuan Desert have been intensively studied in recent years but little is known about the similarities and differences in the dynamics between these two communities. Using 15 yr of census data from permanent quadrats, this paper compared the characteristics and temporal dynamics of these two distinct, spatially co-existent but temporally segregated communities. Although the total number of summer annual species recorded during our 15 yr of observation was higher than winter annuals, the mean number of species observed each year was higher in the winter community. The winter community exhibited lower temporal variation in total plant abundance and populations of individual species, lower species turnover rate and higher evenness than the summer community. The rank abundances of species in winter were significantly positively correlated for a period of up to 7 yr while in summer significant positive correlations in rank abundance disappeared after 2 to 3 yr. The higher seasonal species diversity (i.e. number of species observed in each season) in winter rather than the overall special pool (over 15 yr) may be responsible for the greater community stability of winter annuals. The difference in long-term community dynamics between the two communities of annual plants are likely due to the differences in total species pool, life history traits (e.g. seed size), and seasonal climatic regimes. perpendicular omenclature:. JF - Journal of Vegetation Science AU - , GQ AU - , BJH AU - , VTJ AD - Present address: U.S. Geological Survey, 8711 37th St. SE, Jamestown, ND 58401-7317, USA, qguo@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 575 EP - 584 PB - International Association of Vegetation Science VL - 13 IS - 4 SN - 1100-9233, 1100-9233 KW - Ecology Abstracts KW - Seeds KW - Data processing KW - Life history KW - Temporal variations KW - Deserts KW - Abundance KW - Plant communities KW - Census KW - D 04040:Ecosystem and Ecology Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19767918?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vegetation+Science&rft.atitle=Long-term+dynamics+of+winter+and+summer+annual+communities+in+the+Chihuahuan+Desert&rft.au=%2C+GQ%3B%2C+BJH%3B%2C+VTJ&rft.aulast=&rft.aufirst=GQ&rft.date=2002-08-01&rft.volume=13&rft.issue=4&rft.spage=575&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vegetation+Science&rft.issn=11009233&rft_id=info:doi/10.1043%2F1100-9233%282002%29013%280575%3ALTDOWA%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=1100-9233&volume=13&page=575 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2009-05-01 N1 - Last updated - 2011-12-14 N1 - SubjectsTermNotLitGenreText - Plant communities; Abundance; Deserts; Life history; Census; Data processing; Temporal variations; Seeds DO - http://dx.doi.org/10.1043/1100-9233(2002)013(0575:LTDOWA)2.0.CO;2 ER - TY - JOUR T1 - Potential Responses of Riparian Vegetation to Dam Removal AN - 19730363; 5439104 AB - In this article, we review the scant information documenting responses of terrestrial vegetation to dam removal and derive expected responses both upstream and downstream of the former dam on the basis of empirical and theoretical relationships between riparian plants, stream hydrology, and fluvial processes. We evaluate case studies from North America of planned or completed dam removals, natural analogs of dam removal, and alternative strategies of releasing and exposing water and sediment. We consider transient and equilibrium responses and the effects of different dam removal strategies on native and exotic plants. We focus on the natural establishment of vegetation following dam removal, although we also discuss active measures such as planting. JF - Bioscience AU - Shafroth, P B AU - Friedman, J M AU - Auble, G T AU - Scott, M L AU - Braatne, J H AD - US Geological Survey's Fort Collins Science Center, Fort Collins, CO 80526-8118, USA, Pat_Shafroth@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 703 EP - 712 PB - American Institute of Biological Sciences VL - 52 IS - 8 SN - 0006-3568, 0006-3568 KW - dam removal KW - Pollution Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts KW - Riparian Vegetation KW - Management KW - Terrestrial environments KW - Man-induced effects KW - Habitat improvement (physical) KW - Streams KW - upstream KW - Vegetation patterns KW - Dams KW - Hydrology KW - Downstream KW - Dam Effects KW - North America KW - Sediment pollution KW - Case Studies KW - Vegetation KW - planting KW - case studies KW - Reviews KW - Plants KW - downstream KW - Riparian vegetation KW - D 04700:Management KW - P 2000:FRESHWATER POLLUTION KW - SW 6010:Structures KW - Q5 08521:Mechanical and natural changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19730363?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioscience&rft.atitle=Potential+Responses+of+Riparian+Vegetation+to+Dam+Removal&rft.au=Shafroth%2C+P+B%3BFriedman%2C+J+M%3BAuble%2C+G+T%3BScott%2C+M+L%3BBraatne%2C+J+H&rft.aulast=Shafroth&rft.aufirst=P&rft.date=2002-08-01&rft.volume=52&rft.issue=8&rft.spage=703&rft.isbn=&rft.btitle=&rft.title=Bioscience&rft.issn=00063568&rft_id=info:doi/10.1043%2F0006-3568%282002%29052%280703%3APRORVT%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Dams; Hydrology; Man-induced effects; Riparian vegetation; Habitat improvement (physical); Vegetation patterns; Management; Terrestrial environments; Reviews; case studies; Sediment pollution; upstream; downstream; Plants; planting; Vegetation; Streams; Riparian Vegetation; Case Studies; Downstream; Dam Effects; North America DO - http://dx.doi.org/10.1043/0006-3568(2002)052(0703:PRORVT)2.0.CO;2 ER - TY - JOUR T1 - Using chemical, hydrologic, and age dating analysis to delineate redox processes and flow paths in the riparian zone of a glacial outwash aquifer-stream system AN - 18900373; 5525548 AB - A combination of chemical and dissolved gas analyses, chlorofluorocarbon age dating, and hydrologic measurements were used to determine the degree to which biogeochemical processes in a riparian wetland were responsible for removing NO sub(3) super(-) from groundwaters discharging to the Otter Tail River in west central Minnesota. An analysis of river chemistry and flow data revealed that NO sub(3) super(-) concentrations in the river increased in the lower half of the 8.3 km study reach as the result of groundwater discharge to the river. Groundwater head measurements along a study transect through the riparian wetland revealed a zone of groundwater discharge extending out under the river. On the basis of combined chemical, dissolved gas, age date, and hydrologic results, it was determined that water chemistry under the riparian wetland was controlled largely by upgradient groundwaters that followed flow paths up to 16 m deep and discharged under the wetland, creating a pattern of progressively older, more chemically reduced, low NO sub(3) super(-) water the farther one progressed from the edge of the wetland toward the river. These findings pose challenges for researchers investigating biogeochemical processes in riparian buffer zones because the progressively older groundwaters entered the aquifer in earlier years when less NO sub(3) super(-) fertilizer was being used. NO sub(3) super(-) concentrations originally present in the groundwater had also decreased in the upgradient aquifer as a result of denitrification and progressively stronger reducing conditions there. The resulting pattern of decreasing NO sub(3) super(-) concentrations across the riparian zone may be incorrectly interpreted as evidence of denitrification losses there instead of in the upgradient aquifer. Consequently, it is important to understand the hydrogeologic setting and age structure of the groundwaters being sampled in order to avoid misinterpreting biogeochemical processes in riparian zones. JF - Water Resources Research AU - Puckett, L J AU - Cowdery, T K AU - McMahon, P B AU - Tornes, L H AU - Stoner, J D AD - U.S. Geological Survey, 413 National Center, 12201 Sunrise Valley Drive, Reston, VA 20192, USA, lpuckett@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 VL - 38 IS - 8 SN - 0043-1397, 0043-1397 KW - USA, Minnesota, Otter Tail R. KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Nitrate KW - Riparian Vegetation KW - Groundwater Discharge KW - Hydrogeology KW - Spatial Distribution KW - Streams KW - Wetlands effects on river water KW - Fertilizers KW - Distribution (Mathematical) KW - Denitrification KW - Wetlands KW - Denitrification in rivers KW - Redox reactions KW - Chemical composition KW - Nitrates KW - Riparian zone KW - Biogeochemistry KW - River water composition KW - River discharge KW - Vegetation KW - Streams (in natural channels) KW - USA, Minnesota KW - Surface-groundwater Relations KW - River water KW - Analytical Methods KW - Chemical reactions KW - Geohydrology KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - Q2 09183:Physics and chemistry KW - M2 556.535.4:Thermal regime (556.535.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18900373?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Using+chemical%2C+hydrologic%2C+and+age+dating+analysis+to+delineate+redox+processes+and+flow+paths+in+the+riparian+zone+of+a+glacial+outwash+aquifer-stream+system&rft.au=Puckett%2C+L+J%3BCowdery%2C+T+K%3BMcMahon%2C+P+B%3BTornes%2C+L+H%3BStoner%2C+J+D&rft.aulast=Puckett&rft.aufirst=L&rft.date=2002-08-01&rft.volume=38&rft.issue=8&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000396 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Redox reactions; Fertilizers; Chemical composition; River water; Riparian zone; Chemical reactions; Biogeochemistry; Denitrification; River discharge; Wetlands; Wetlands effects on river water; River water composition; Denitrification in rivers; Nitrate; Distribution (Mathematical); Hydrogeology; Vegetation; Streams (in natural channels); Riparian Vegetation; Groundwater Discharge; Surface-groundwater Relations; Nitrates; Analytical Methods; Geohydrology; Spatial Distribution; Streams; USA, Minnesota DO - http://dx.doi.org/10.1029/2001WR000396 ER - TY - JOUR T1 - Multispecies reactive tracer test in an aquifer with spatially variable chemical conditions, Cape Cod, Massachusetts: Dispersive transport of bromide and nickel AN - 18859001; 5525575 AB - Dispersive transport of groundwater solutes was investigated as part of a multispecies reactive tracer test conducted under spatially variable chemical conditions in an unconfined, sewage-contaminated sand and gravel aquifer on Cape Cod, Massachusetts. Transport of the nonreactive tracer bromide (Br) reflected physical and hydrologic processes. Transport of the reactive tracer nickel (Ni) complexed with an organic ligand (NiEDTA) varied in response to pH and other chemical conditions within the aquifer. A loss of about 14% of the Ni mass was calculated from the distribution of tracers through time. This loss is consistent with reversible adsorption of NiEDTA onto the iron and aluminum oxyhydroxide coatings on the aquifer sediments. The Ni consistently lagged behind Br with a calculated retardation coefficient of 1.2. Longitudinal dispersivities reached constant values of 2.2 and 1.1 m for Br and Ni, respectively, by at least 69 m of travel. The smaller dispersivity for Ni possibly was due to nonlinear or spatially variant adsorption of NiEDTA. In the upper, uncontaminated zone of the aquifer, longitudinal dispersion of Ni was greater than that of Br early in the test as a result of reversible adsorption of NiEDTA. In general, transverse dispersivities were much smaller (horizontal: 1.4-1.5 x 10 super(-2) m; vertical: 0.5-3.8 x 10 super(-3) m) than the longitudinal dispersivities. The Br results are similar to those from a test conducted eight years earlier, suggesting that transport parameters are spatially stationary within the aquifer at the scale of 300 m covered by the spatially overlapping tests. A significant difference between the two tests was the travel distance (69 and 26 m) needed to reach a constant longitudinal dispersivity. JF - Water Resources Research AU - Hess, K M AU - Davis, JA AU - Kent, D B AU - Coston, JA AD - U.S. Geological Survey, 10 Bearfoot Road, Northborough, MA 01532, USA, kmhess@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 VL - 38 IS - 8 SN - 0043-1397, 0043-1397 KW - USA, Massachusetts, Cape Cod KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Experimental Data KW - Adsorption (see also Sorption) KW - Groundwater flow KW - Nickel KW - Field Tests KW - Mixing KW - Solutes KW - Tracers KW - Solute Transport KW - Bromides KW - Solute transport by groundwater KW - Adsorption KW - Groundwater tracers KW - Field studies KW - ANW, USA, Massachusetts, Cape Cod KW - Groundwater Movement KW - Aquifer investigations KW - M2 556.332.4:Permeability of rock formations (556.332.4) KW - SW 0840:Groundwater KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18859001?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Multispecies+reactive+tracer+test+in+an+aquifer+with+spatially+variable+chemical+conditions%2C+Cape+Cod%2C+Massachusetts%3A+Dispersive+transport+of+bromide+and+nickel&rft.au=Hess%2C+K+M%3BDavis%2C+JA%3BKent%2C+D+B%3BCoston%2C+JA&rft.aulast=Hess&rft.aufirst=K&rft.date=2002-08-01&rft.volume=38&rft.issue=8&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000945 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Solute transport by groundwater; Groundwater tracers; Aquifer investigations; Tracers; Solutes; Adsorption (see also Sorption); Bromides; Nickel; Groundwater flow; Field studies; Mixing; Experimental Data; Solute Transport; Adsorption; Field Tests; Groundwater Movement; ANW, USA, Massachusetts, Cape Cod DO - http://dx.doi.org/10.1029/2001WR000945 ER - TY - JOUR T1 - Temporal Variation In Bird Counts Within A Hawaiian Rainforest AN - 18452470; 5419290 AB - We studied monthly and annual variation in density estimates of nine forest bird species along an elevational gradient in an east Maui rainforest. We conducted monthly variable circular-plot counts for 36 consecutive months along transects running downhill from timberline. Density estimates were compared by month, year, and station for all resident bird species with sizeable populations, including four native nectarivores, two native insectivores, a non-native insectivore, and two non-native generalists. We compared densities among three elevational strata and between breeding and nonbreeding seasons. All species showed significant differences in density estimates among months and years. Three native nectarivores had higher density estimates within their breeding season (December-May) and showed decreases during periods of low nectar production following the breeding season. All insectivore and generalist species except one had higher density estimates within their March-August breeding season. Density estimates also varied with elevation for all species, and for four species a seasonal shift in population was indicated. Our data show that the best time to conduct counts for native forest birds on Maui is January-February, when birds are breeding or preparing to breed, counts are typically high, variability in density estimates is low, and the likelihood for fair weather is best. Temporal variations in density estimates documented in our study site emphasize the need for consistent, well-researched survey regimens and for caution when drawing conclusions from, or basing management decisions on, survey data.Original Abstract: Estudiamos la variacion mensual y anual en estimaciones de la densidad de nueve especies de aves a lo largo de un gradiente altitudinal en una selva lluviosa del este de Maui. Realizamos conteos mensuales en parcelas circulares por un periodo de 36 meses consecutivos a lo largo de transectas ubicadas desde la linea del bosque hacia abajo. Las estimaciones de densidad fueron comparadas entre meses, anos y estaciones considerando todas las especies de aves residentes con poblaciones considerables, incluyendo cuatro nectarivoros nativos, dos insectivoros nativos, un insectivoro no nativo y dos generalistas no nativos. Comparamos densidades entre tres estratos altitudinales y entre las estaciones reproductivas y no reproductivas. Todas las especies mostraron diferencias significativas en las estimaciones de densidad entre meses y anos. Tres nectarivoros nativos presentaron estimaciones de densidad mayores durante sus epocas reproductivas (diciembre-mayo) y mostraron disminuciones durante periodos de baja produccion de nectar luego de la estacion de cria. Excepto una, todas las especies insectivoras y generalistas presentaron mayores estimaciones de densidad durante sus epocas reproductivas (marzo-agosto). Las estimaciones de densidad de todas las especies tambien variaron con la altitud, y se encontraron cambios estacionales en las poblaciones de cuatro especies. Nuestros datos muestran que el mejor momento para realizar conteos de aves nativas de selva en Maui es enero-febrero, cuando las aves estan criando o preparandose para criar, los conteos son tipicamente altos, la variabilidad en las estimaciones de densidad es baja y la probabilidad de buen tiempo es mas alta. La variacion temporal en las estimaciones de densidad documentadas en nuestro sitio de estudio enfatizan la necesidad de regimenes de muestreo consistentes y bien establecidos, y sugiere cautela a la hora de sacar conclusiones para conservacion o tomar decisiones de manejo a partir de datos de muestreos. JF - Condor AU - Simon, J C AU - Pratt, T K AU - Berlin, KE AU - Kowalsky, J R AU - Fancy, S G AU - Hatfield, J S AD - USGS Pacific Island Ecosystems Research Center, P.O. Box 44, Hawai'i National Park, HI 96718-0044, thane_pratt@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 469 EP - 481 PB - Cooper Ornithological Society VL - 104 IS - 3 SN - 0010-5422, 0010-5422 KW - Birds KW - Ecology Abstracts KW - D 04671:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18452470?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Condor&rft.atitle=Temporal+Variation+In+Bird+Counts+Within+A+Hawaiian+Rainforest&rft.au=Simon%2C+J+C%3BPratt%2C+T+K%3BBerlin%2C+KE%3BKowalsky%2C+J+R%3BFancy%2C+S+G%3BHatfield%2C+J+S&rft.aulast=Simon&rft.aufirst=J&rft.date=2002-08-01&rft.volume=104&rft.issue=3&rft.spage=469&rft.isbn=&rft.btitle=&rft.title=Condor&rft.issn=00105422&rft_id=info:doi/10.1043%2F0010-5422%282002%29104%280469%3ATVIBCW%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/0010-5422(2002)104(0469:TVIBCW)2.0.CO;2 ER - TY - JOUR T1 - Drainage reversals in Mono Basin during the late Pliocene and Pleistocene AN - 18027620; 5567159 AB - Mono Basin, on the eastern flank of the central Sierra Nevada, is the highest of the large hydrographically closed basins in the Basin and Range province. We use geomorphic features, shoreline deposits, and basalt-filled paleochannels to reconstruct an early to middle Pleistocene record of shorelines and changing spillways of Lake Russell in Mono Basin. During this period of time, Lake Russell repeatedly attained altitudes between 2205 and 2280 m--levels far above the present surface of Mono Lake ( similar to 1950 m) and above its last overflow level (2188 m). The spill point of Lake Russell shifted through time owing to late Tertiary and Quaternary faulting and volcanism. During the early Pleistocene, the lake periodically discharged through the Mount Hicks spillway on the northeastern rim of Mono Basin and flowed northward into the Walker Lake drainage basin via the East Walker River. Paleochannels recording such discharge were incised prior to 1.6 Ma, possibly between 1.6 and 1.3 Ma, and again after 1.3 Ma (ages of basaltic flows that plugged the paleochannels). Faulting in the Adobe Hills on the southeastern margin of the basin eventually lowered the rim in this area to below the altitude of the Mount Hicks spillway. Twice after 0.76 Ma, and possibly as late as after 0.1 Ma, Lake Russell discharged southward through the Adobe Hills spillway into the Owens-Death Valley system of lakes. This study supports a pre-Pleistocene aquatic connection through Mono Basin between the hydrologically distinct Lahontan and Owens-Death Valley systems, as long postulated by biologists, and also confirms a probable link during the Pleistocene for species adapted to travel upstream in fast-flowing water. JF - Bulletin of the Geological Society of America AU - Reheis, M C AU - Stine, S AU - Sarna-Wojcicki, A M AD - U.S. Geological Survey, M.S. 980, Federal Center, Denver, Colorado 80225, USA, mreheis@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 991 EP - 1006 VL - 114 IS - 8 SN - 0016-7606, 0016-7606 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Rivers KW - Volcanism KW - Palaeo studies KW - Spillways KW - Catchment Areas KW - River discharge KW - Flow Discharge KW - River basins KW - Drainage Patterns KW - USA, California, Mono Basin, Russell L. KW - Lakes KW - Closed Basins KW - Geomorphology KW - Geologic History KW - Pleistocene KW - Pliocene KW - Lake Basins KW - Q2 09263:Topography and morphology KW - SW 0850:Lakes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18027620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Geological+Society+of+America&rft.atitle=Drainage+reversals+in+Mono+Basin+during+the+late+Pliocene+and+Pleistocene&rft.au=Reheis%2C+M+C%3BStine%2C+S%3BSarna-Wojcicki%2C+A+M&rft.aulast=Reheis&rft.aufirst=M&rft.date=2002-08-01&rft.volume=114&rft.issue=8&rft.spage=991&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Geomorphology; Volcanism; Palaeo studies; River discharge; Pliocene; Pleistocene; River basins; Rivers; Lakes; Closed Basins; Geologic History; Catchment Areas; Spillways; Flow Discharge; Lake Basins; Drainage Patterns; USA, California, Mono Basin, Russell L. ER - TY - JOUR T1 - Effects of flow on the fish communities of a regulated California river: implications for managing native fishes AN - 1798740836; 5436893 AB - We assessed the importance of flow regime to the success of native and non-native fish species by analysing winter/spring seining data collected from 1987 to 1997 on the resident fish communities of the lower Tuolumne River, California. The data were analysed using regression models to predict the percentage of non-native fish at a site. The regression models included various combinations of the variables longitudinal location of the site, mean April/May stream discharge in the year of sampling, and mean April/May stream discharge in the previous year. Comparison of the models indicated that the best model included longitudinal location and stream discharge in the previous year. This model is consistent with the hypothesis that flow in the previous year differentially affects reproductive success of native and non-native species and thus the resulting community sampled in the following winter/spring. A detrended correspondence analysis of percentage abundance species data identified a co-occurring group of native species and a co-occurring group of non-native species with the non-native red shiner (Cyprinella lutrensis) grouping separately. The differing reproductive strategies of the species were consistent with the hypothesis concerning spawning success. Our results indicate that flow regime is an important determinant of the reproductive success of native and non-native fish species in regulated rivers. Manipulations of flow regime are a potentially powerful tool for managing native fish species, but should be considered in combination with other restoration efforts and in the context of ecosystem restoration. JF - River Research and Applications AU - Brown, L R AU - Ford, T AD - 5083 Veranda Terrace, Davis, CA, 95616, USA, lrbrown@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 331 EP - 342 VL - 18 IS - 4 SN - 1535-1459, 1535-1459 KW - Red shiner KW - USA, California, Tuolumne R. KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Regression Analysis KW - Regulated Rivers KW - Population Dynamics KW - Freshwater KW - Species Composition KW - Fishing and fisheries KW - Pisces KW - Endemic species KW - Fish Management KW - Flow control KW - Regression analysis KW - Ecosystem management KW - River discharge KW - Spawning KW - Cyprinella lutrensis KW - Population statistics KW - Model Studies KW - Stream flow KW - Statistical Models KW - Fish Populations KW - Flow Control KW - Introduced species KW - Breeding success KW - AQ 00001:Water Resources and Supplies KW - SW 4070:Ecological impact of water development KW - Q1 08442:Population dynamics KW - Q5 08522:Protective measures and control UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1798740836?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=River+Research+and+Applications&rft.atitle=Effects+of+flow+on+the+fish+communities+of+a+regulated+California+river%3A+implications+for+managing+native+fishes&rft.au=Brown%2C+L+R%3BFord%2C+T&rft.aulast=Brown&rft.aufirst=L&rft.date=2002-08-01&rft.volume=18&rft.issue=4&rft.spage=331&rft.isbn=&rft.btitle=&rft.title=River+Research+and+Applications&rft.issn=15351459&rft_id=info:doi/10.1002%2Frra.673 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Endemic species; Ecosystem management; River discharge; Introduced species; Breeding success; Stream flow; Flow control; Regression analysis; Spawning; Population statistics; Fishing and fisheries; Regression Analysis; Fish Management; Regulated Rivers; Population Dynamics; Statistical Models; Fish Populations; Flow Control; Species Composition; Model Studies; Pisces; Cyprinella lutrensis; Freshwater DO - http://dx.doi.org/10.1002/rra.673 ER - TY - JOUR T1 - Space Use, Migratory Connectivity, And Population Segregation Among Willets Breeding In The Western Great Basin AN - 1665490066; 5419304 AB - Western Willets (Catoptrophorus semipalmatus inornatus) were banded (n = 146 breeding adults and chicks) and radio-marked (n = 68 adults) at three western Great Basin wetland complexes to determine inter- and intraseasonal space use and movement patterns (primarily in 1998 and 1999). Birds were then tracked to overwintering sites where migratory connectivity and local movements were documented. Willets arrived synchronously at breeding sites during mid-April and spent less than 12 weeks in the Great Basin. There were no movements to other sites in the Great Basin during the breeding or postbreeding season. However, most breeding birds moved locally on a daily basis from upland nest sites to wetland foraging sites. The mean distance breeding birds were detected from nests did not differ between sexes or between members of a pair, although these distances were greater among postbreeding than breeding birds. Home-range estimates did not differ significantly between paired males and females during breeding or postbreeding. However, female home ranges were larger following breeding than during breeding. Shortly after chicks fledged, adult Willets left the Great Basin for locations primarily at coastal and estuarine sites in the San Francisco Bay area. Limited data revealed little among-site movements once Willets arrived at the coast, and birds appeared to be site faithful in subsequent winters. Winter sites of western Great Basin Willets differed from those used by birds from other areas in the subspecies' range, suggesting another subspecies or distinct population segment may exist. This study illustrates the importance of understanding movements and space use throughout the annual cycle in conservation planning.Original Abstract: Un total de 146 individuos reproductivos y polluelos de Catoptrophorus semipalmatus inornatus fueron anillados y 68 marcados con radio transmisores en tres complejos de humedales del Great Basin occidental para determinar patrones inter- e intraestacionales en el uso del espacio y los movimientos, principalmente en 1998 y 1999. Las aves fueron seguidas mediante radio telemetria hasta sus areas de invernada, donde se documentaron la conectividad migratoria y los movimientos locales. Las aves arribaron sincronicamente a sus sitios reproductivos a mediados de abril, donde permanecieron menos de 12 semanas. No hubo movimientos hacia otros sitios del Great Basin durante la estacion reproductiva o post-reproductiva. Sin embargo, muchas aves se movieron a diario localmente desde sitios de anidacion en zonas altas hasta sitios de forrajeo en humedales. La distancia media entre las aves y sus nidos no difirio entre sexos ni entre miembros de una pareja, aunque estas distancias fueron mayores entre aves post-reproductivas que entre aves que estaban reproduciendose. Los rangos de hogar no difirieron significativamente entre machos y hembras de una misma pareja durante o despues de la reproduccion, pero los de las hembras fueron mayores luego del periodo reproductivo. Poco despues de que los polluelos emplumaron, los adultos abandonaron el Great Basin principalmente hacia sitios costeros o estuarinos de la Bahia de San Francisco. Una vez que las aves llegaron a la costa, se movieron poco entre sitios, y los individuos parecieron ser fieles a sus sitios en inviernos subsiguientes. Los sitios de invierno de C. s. inornatus en el Great Basin occidental difirieron de aquellos usados por aves de otras areas del rango de esta subespecie, sugiriendo que otra subespecie o una seccion poblacional distinta podria existir. Este estudio ilustra la importancia de entender los movimientos y el uso del espacio a traves del ciclo anual para establecer planes de conservacion. JF - Condor AU - Haig, S M AU - Oring, L W AU - Sanzenbacher, P M AU - Taft, O W AD - USGS Forest and Rangeland Ecosystem Science Center, 3200 SW Jefferson Way, Corvallis, OR 97331, susan_haig@usgs.gov Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 620 EP - 630 PB - Cooper Ornithological Society VL - 104 IS - 3 SN - 0010-5422, 0010-5422 KW - Willet KW - Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; Animal Behavior Abstracts; Ecology Abstracts KW - Marine KW - Catoptrophorus semipalmatus KW - Spatial distribution KW - Males KW - Subpopulations KW - Catoptrophorus semipalmatus inornatus KW - Brackish KW - Freshwater KW - Habitat KW - Migration KW - Local movements KW - USA KW - USA, Great Basin KW - Breeding sites KW - Movements KW - Migrations KW - INE, USA, California, San Francisco Bay KW - Population structure KW - Habitat utilization KW - Home range KW - Females KW - O 1070:Ecology/Community Studies KW - Q1 08421:Migrations and rhythms KW - D 04671:Birds KW - Y 25506:Birds KW - O 1050:Vertebrates, Urochordates and Cephalochordates KW - Q1 08364:Reproduction and development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665490066?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Condor&rft.atitle=Space+Use%2C+Migratory+Connectivity%2C+And+Population+Segregation+Among+Willets+Breeding+In+The+Western+Great+Basin&rft.au=Haig%2C+S+M%3BOring%2C+L+W%3BSanzenbacher%2C+P+M%3BTaft%2C+O+W&rft.aulast=Haig&rft.aufirst=S&rft.date=2002-08-01&rft.volume=104&rft.issue=3&rft.spage=620&rft.isbn=&rft.btitle=&rft.title=Condor&rft.issn=00105422&rft_id=info:doi/10.1043%2F0010-5422%282002%29104%280620%3ASUMCAP%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Local movements; Breeding sites; Subpopulations; Males; Migrations; Home range; Females; Habitat; Spatial distribution; Movements; Habitat utilization; Population structure; Migration; Catoptrophorus semipalmatus; Catoptrophorus semipalmatus inornatus; USA, Great Basin; USA; INE, USA, California, San Francisco Bay; Freshwater; Brackish; Marine DO - http://dx.doi.org/10.1043/0010-5422(2002)104(0620:SUMCAP)2.0.CO;2 ER - TY - JOUR T1 - Relations between Soil Moisture and Satellite Vegetation Indices in the U.S. Corn Belt AN - 1665489372; 5419768 AB - Satellite-derived vegetation indices extracted over locations representative of midwestern U.S. cropland and forest for the period 1990-94 are analyzed to determine the sensitivity of the indices to neutron probe soil moisture measurements of the Illinois Climate Network (ICN). The deseasoned (i.e., departures from multiyear mean annual cycle) soil moisture measurements are shown to be weakly correlated with the deseasoned full resolution (1 km x 1 km) normalized difference vegetation index (NDVI) and fractional vegetation cover (FVC) data over both land cover types. The association, measured by the Pearson-moment-correlation coefficient, is stronger over forest than over cropland during the growing season (April-September). The correlations improve successively when the NDVI and FVC pixel data are aggregated to 3 km x 3 km, 5 km x 5 km, and 7 km x 7 km areas. The improved correlations are partly explained by the reduction in satellite navigation errors as spatial aggregation occurs, as well as the apparent scale dependence of the NDVI-soil moisture association. Similarly, stronger relations are obtained with soil moisture data that are lagged by up to 8 weeks with respect to the vegetation indices, implying that soil moisture may be a useful predictor of warm season satellite-derived vegetation conditions. This study suggests that a 'long-term' memory of several weeks is present in the near-surface hydrological characteristics, especially soil water content, of the Midwest Corn Belt. The memory is integrated into the satellite vegetation indices and may be useful for predicting crop yield estimates and surface temperature anomalies. JF - Journal of Hydrometeorology AU - Adegoke, JO AU - Carleton, A M AD - Science and Applications Branch, USGS EROS Data Center, 47914 252nd St., Sioux Falls, SD 57198, adegoke@usgs.gov Y1 - 2002/08// PY - 2002 DA - August 2002 SP - 395 EP - 405 PB - American Meteorological Society VL - 3 IS - 4 SN - 1525-755X, 1525-755X KW - USA, midwest KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Remote Sensing KW - Land Use KW - Satellite Technology KW - USA, Midwest KW - Vegetation KW - Forests KW - Soil Water KW - Crops KW - Hydrometeorology KW - Satellite soil moisture estimates KW - Correlation Analysis KW - Soil-water-plant Relationships KW - Vegetation index derived from satellites KW - SW 5040:Data acquisition KW - SW 0810:General KW - M2 551.579:Hydrometeorology (551.579) KW - M2 551.501.86:Use of satellite-borne instruments (551.501.86) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665489372?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrometeorology&rft.atitle=Relations+between+Soil+Moisture+and+Satellite+Vegetation+Indices+in+the+U.S.+Corn+Belt&rft.au=Adegoke%2C+JO%3BCarleton%2C+A+M&rft.aulast=Adegoke&rft.aufirst=JO&rft.date=2002-08-01&rft.volume=3&rft.issue=4&rft.spage=395&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1043%2F1525-7541%282002%29003%280395%3ARBSMAS%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Satellite soil moisture estimates; Vegetation index derived from satellites; Land Use; Remote Sensing; Hydrometeorology; Satellite Technology; Correlation Analysis; Forests; Vegetation; Soil-water-plant Relationships; Soil Water; Crops; USA, Midwest DO - http://dx.doi.org/10.1043/1525-7541(2002)003(0395:RBSMAS)2.0.CO;2 ER - TY - JOUR T1 - Environmental geochemistry of abandoned mercury mines in West-Central Nevada, USA AN - 16152219; 5461035 AB - The Humboldt River is a closed basin and is the longest river in Nevada. Numerous abandoned Hg mines are located within the basin, and because Hg is a toxic heavy metal, the potential transport of Hg from these mines into surrounding ecosystems, including the Humboldt River, is of environmental concern. Samples of ore, sediment, water, calcines (roasted ore), and leachates of the calcines were analyzed for Hg and other heavy metals to evaluate geochemical dispersion from the mines. Cinnabar-bearing ore samples collected from the mines contain highly elevated Hg concentrations, up to 6.9%, whereas calcines collected from the mines contain up to 2000 mg Hg/kg. Stream-sediment samples collected within 1 km of the mines contain as much as 170 mg Hg/kg, but those collected distal from the mines (> 5 km) contain 8 km from the Humboldt River, and Hg is transported and diluted through a large volume of pediment before it reaches the Humboldt River. JF - Applied Geochemistry AU - Gray, JE AU - Crock, J G AU - Fey, D L AD - US Geological Survey, PO Box 25046, Federal Center, MS 973, Denver, CO 80225, USA, jgray@usgs.gov A2 - Fuge, R Y1 - 2002/08// PY - 2002 DA - Aug 2002 SP - 1069 EP - 1079 PB - Elsevier Science Ltd., Pergamon, P.O. Box 800 Kidlington Oxford OX5 1DX UK VL - 17 IS - 8 SN - 0883-2927, 0883-2927 KW - USA, Nevada, Humboldt R. KW - Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Water Pollution Sources KW - Heavy metals KW - Fate of Pollutants KW - Mine drainage KW - Geochemistry KW - River basins KW - Data collections KW - Spatial Distribution KW - Heavy Metals KW - Mining waste waters KW - Distribution (Mathematical) KW - Mercury KW - Mercury-197 KW - Pollution (Water) KW - Mine Drainage KW - Data Collections KW - SW 0880:Chemical processes KW - AQ 00007:Industrial Effluents KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16152219?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=Applied+Geochemistry&rft.atitle=Environmental+geochemistry+of+abandoned+mercury+mines+in+West-Central+Nevada%2C+USA&rft.au=Gray%2C+JE%3BCrock%2C+J+G%3BFey%2C+D+L&rft.aulast=Gray&rft.aufirst=JE&rft.date=2002-08-01&rft.volume=17&rft.issue=8&rft.spage=1069&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-09-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Heavy metals; Geochemistry; Mine drainage; Mercury; River basins; Distribution (Mathematical); Mercury-197; Data collections; Pollution (Water); Mining waste waters; Water Pollution Sources; Fate of Pollutants; Spatial Distribution; Heavy Metals; Data Collections; Mine Drainage ER - TY - CPAPER T1 - Advances in integrating spatially variable rainfall and self-similar river networks AN - 39655959; 3682690 AU - Veitzer, S Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39655959?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Advances+in+integrating+spatially+variable+rainfall+and+self-similar+river+networks&rft.au=Veitzer%2C+S&rft.aulast=Veitzer&rft.aufirst=S&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Colorado State University, Civil Engineering Dept., Fort Collins, CO 80523-1372, USA; URL: hydrologydays.colostate.edu N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Reducing vulnerability of ports and harbors to earthquake - Tsunami hazards AN - 39634990; 3693855 AU - Wood, N AU - Good, J AU - Goodwin, R Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39634990?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Reducing+vulnerability+of+ports+and+harbors+to+earthquake+-+Tsunami+hazards&rft.au=Wood%2C+N%3BGood%2C+J%3BGoodwin%2C+R&rft.aulast=Wood&rft.aufirst=N&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Solutions to Coastal Disasters Conference 2002, c/o California Coastal Commission; URL: www.coastal.ca.gov N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Impacts of climate change on coastal wetlands AN - 39536092; 3693812 AU - Gunterspergen, G R Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39536092?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Impacts+of+climate+change+on+coastal+wetlands&rft.au=Gunterspergen%2C+G+R&rft.aulast=Gunterspergen&rft.aufirst=G&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Solutions to Coastal Disasters Conference 2002, c/o California Coastal Commission; URL: www.coastal.ca.gov N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Competing water needs: Modeling Klamath River drought allocations AN - 39535951; 3682631 AU - Flug, M AU - Campbell, S G AU - Hanna, R B Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39535951?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Competing+water+needs%3A+Modeling+Klamath+River+drought+allocations&rft.au=Flug%2C+M%3BCampbell%2C+S+G%3BHanna%2C+R+B&rft.aulast=Flug&rft.aufirst=M&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Colorado State University, Civil Engineering Dept., Fort Collins, CO 80523-1372, USA; URL: hydrologydays.colostate.edu N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Hydrologic analysis for river ecosystem management AN - 39532714; 3682621 AU - Campbell, S G AU - Flug, M AU - Hanna, R B Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39532714?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Hydrologic+analysis+for+river+ecosystem+management&rft.au=Campbell%2C+S+G%3BFlug%2C+M%3BHanna%2C+R+B&rft.aulast=Campbell&rft.aufirst=S&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Colorado State University, Civil Engineering Dept., Fort Collins, CO 80523-1372, USA; URL: hydrologydays.colostate.edu N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Assessment of the Silurian Qusaiba Total Petroleum System of the Arabian Peninsula AN - 39499753; 3695683 AU - Schenk, C J AU - Ahlbrandt, T S AU - Pollastro, R M Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39499753?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Assessment+of+the+Silurian+Qusaiba+Total+Petroleum+System+of+the+Arabian+Peninsula&rft.au=Schenk%2C+C+J%3BAhlbrandt%2C+T+S%3BPollastro%2C+R+M&rft.aulast=Schenk&rft.aufirst=C&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Gulf PetroLink.com, c/o Unilink, 4 Cataraqui St., Suite 308, Kingston, ON K7K 1Z7, Canada; phone: 613-549-0404; fax: 613-549-2528; as@unilinkfaires.com N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Using Tsunami deposits to improve assessment of Tsunami risk AN - 39468797; 3693823 AU - Jaffe, B AU - Gelfenbaum, G Y1 - 2002/07/31/ PY - 2002 DA - 2002 Jul 31 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39468797?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Using+Tsunami+deposits+to+improve+assessment+of+Tsunami+risk&rft.au=Jaffe%2C+B%3BGelfenbaum%2C+G&rft.aulast=Jaffe&rft.aufirst=B&rft.date=2002-07-31&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Solutions to Coastal Disasters Conference 2002, c/o California Coastal Commission; URL: www.coastal.ca.gov N1 - Last updated - 2010-05-03 ER - TY - JOUR T1 - The influence of microclimates and fog on stable isotope signatures used in interpretation of regional hydrology: East Maui, Hawaii AN - 18566592; 5434215 AB - Stable isotopes of precipitation, ground water and surface water measured on the windward side of East Maui from 0 to 3055 m altitude were used to determine recharge sources for stream flow and ground water. Correct interpretation of the hydrology using rainfall delta super(18)O gradients with altitude required consideration of the influence of fog, as fog samples had isotopic signatures enriched by as much as 3ppt in delta super(18)O and 21ppt in delta D compared to volume-weighted average precipitation at the same altitude. The isotopic analyses suggested that fog drip was a major component of stream flow and shallow ground water at higher altitudes in the watershed. super(18)O/altitude gradients in rainfall were comparable for similar microclimates on Maui (this study) and Hawaii Island (1990-1995 study), however, East Maui delta super(18)O values for rain in trade-wind and high-altitude microclimates were enriched compared to those from Hawaii Island. Isotopes were used to interpret regional hydrology in this volcanic island aquifer system. In part of the study area, stable isotopes indicate discharge of ground water recharged at least 1000 m above the sample site. This deep-flowpath ground water was found in springs from sea level up to 240 m altitude, indicating saturation to altitudes much higher than a typical freshwater lens. These findings help in predicting the effects of ground water development on stream flow in the area. JF - Journal of Hydrology (Amsterdam) AU - Scholl, MA AU - Gingerich, S B AU - Tribble, G W AD - US Geological Survey, 431 National Center, Reston, VA 20192, USA, mascholl@usgs.gov Y1 - 2002/07/30/ PY - 2002 DA - 2002 Jul 30 SP - 170 EP - 184 VL - 264 IS - 1-4 SN - 0022-1694, 0022-1694 KW - USA, Hawaii, Maui KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Freshwater KW - AQ 00001:Water Resources and Supplies KW - Q2 02243:Structure, mechanics and thermodynamics KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18566592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=The+influence+of+microclimates+and+fog+on+stable+isotope+signatures+used+in+interpretation+of+regional+hydrology%3A+East+Maui%2C+Hawaii&rft.au=Scholl%2C+MA%3BGingerich%2C+S+B%3BTribble%2C+G+W&rft.aulast=Scholl&rft.aufirst=MA&rft.date=2002-07-30&rft.volume=264&rft.issue=1-4&rft.spage=170&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Methylmercury in Flood-Control Impoundments and Natural Waters of Northwestern Minnesota, 1997-99 AN - 759316385; 13726887 AB - We studied methylmercury (MeHg) and totalmercury (Hg sub(T)) in impounded and natural surface waters innorthwestern Minnesota, in settings ranging from agriculturalto undeveloped. In a recently constructed (1995) permanent-pool impoundment, MeHg levels typically increased from inflowto outflow during 1997; this trend broke down from late 1998 toearly 1999. MeHg levels in the outflow reached seasonal maximain mid-summer (maximum of 1.0 ng L super(-1) in July 1997) andlate-winter (maximum of 6.6 ng L super(-1) in February 1999), andare comparable to high levels observed in new hydroelectricreservoirs in Canada. Spring and autumn MeHg levels weretypically about 0.1-0.2 ng L super(-1). Overall, MeHg levels inboth the inflow (a ditch that drains peatlands) and outflowwere significantly higher than in three nearby referencenatural lakes. Eleven older permanent-pool impoundments andsix natural lakes in northwestern Minnesota were sampled fivetimes. The impoundments typically had higher MeHg levels(0.071-8.36 ng L super(-1)) than natural lakes. Five of six lakesMeHg levels typical of uncontaminated lakes (0.014-1.04 ngL super(-1)) with highest levels in late winter, whereas ahypereutrophic lake had high levels (0.37-3.67 ng L super(-1))with highest levels in mid-summer. Seven temporary-poolimpoundments were sampled during summer high-flow events. Temporary-pool impoundments that retained water for about 10-15days after innundation yielded pronounced increases in MeHgfrom inflow to outflow, in one case reaching 4.6 ng L super(-1),which was about 2 ng L super(-1) greater than the mean inflowconcentration during the runoff event. JF - Water, Air, & Soil Pollution AU - Brigham, ME AU - Krabbenhoft, D P AU - Olson, M L AU - DeWild, J F AD - U.S. Geological Survey, 2280 Woodale Drive, Mounds View, MN, 55112, mbrigham@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 61 EP - 78 PB - Springer-Verlag, Tiergartenstrasse 17 Heidelberg 69121 Germany VL - 138 IS - 1-4 SN - 0049-6979, 0049-6979 KW - Toxicology Abstracts; Meteorological & Geoastrophysical Abstracts; Environment Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Peatlands KW - Surface water KW - outflow KW - Surface Water KW - Lakes KW - Dimethylmercury KW - inflow KW - Drains KW - Reservoirs KW - Seasonal variations KW - Agricultural runoff KW - Methylmercury KW - Methyl mercury KW - Atmospheric pollution KW - Soil contamination KW - USA, Minnesota KW - Water pollution KW - Natural Waters KW - Soil pollution KW - Air pollution KW - Canada KW - Impoundments KW - summer KW - Ditches KW - Runoff KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - Q5 08502:Methods and instruments KW - M2 551.5:General (551.5) KW - X 24360:Metals KW - AQ 00005:Underground Services and Water Use KW - ENA 01:Air Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/759316385?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water%2C+Air%2C+%26+Soil+Pollution&rft.atitle=Methylmercury+in+Flood-Control+Impoundments+and+Natural+Waters+of+Northwestern+Minnesota%2C+1997-99&rft.au=Brigham%2C+ME%3BKrabbenhoft%2C+D+P%3BOlson%2C+M+L%3BDeWild%2C+J+F&rft.aulast=Brigham&rft.aufirst=ME&rft.date=2002-07-01&rft.volume=138&rft.issue=1-4&rft.spage=61&rft.isbn=&rft.btitle=&rft.title=Water%2C+Air%2C+%26+Soil+Pollution&rft.issn=00496979&rft_id=info:doi/10.1023%2FA%3A1015573621474 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2010-10-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Air pollution; Methyl mercury; Impoundments; Agricultural runoff; Water pollution; Soil pollution; Peatlands; Lakes; Surface water; Dimethylmercury; Drains; Runoff; Atmospheric pollution; Methylmercury; summer; inflow; outflow; Soil contamination; Seasonal variations; Natural Waters; Surface Water; Ditches; Reservoirs; Canada; USA, Minnesota DO - http://dx.doi.org/10.1023/A:1015573621474 ER - TY - JOUR T1 - Selenium stable isotope ratios in California agricultural drainage water management systems. AN - 71985168; 12175032 AB - Selenium stable isotope ratios are known to shift in predictable ways during various microbial, chemical, and biological processes, and can be used to better understand Se cycling in contaminated environments. In this study we used Se stable isotopes to discern the mechanisms controlling the transformation of oxidized, aqueous forms of Se to reduced, insoluble forms in sediments of Se-affected environments. We measured 80Se/76Se in surface waters, shallow ground waters, evaporites, digested plants and sediments, and sequential extracts from several sites where agricultural drainage water is processed in the San Joaquin Valley of California. Selenium isotope analyses of samples obtained from the Tulare Lake Drainage District flow-through wetland reveal small isotopic contrasts (mean difference 0.7%) between surface water and reduced Se species in the underlying sediments. Selenium in aquatic macrophytes was very similar isotopically to the NaOH and Na2SO3 sediment extracts designed to recover soluble organic Se and Se(0), respectively. For the integrated on-farm drainage management sites, evaporite salts were slightly (approximately 0.6%) enriched in the heavier isotope relative to the inferred parent waters, whereas surface soils were slightly (approximately 1.4%) depleted. Bacterial or chemical reduction of Se(VI) or Se(IV) may be occurring at these sites, but the small isotopic contrasts suggest that other, less isotopically fractionating mechanisms are responsible for accumulation of reduced forms in the sediments. These findings provide evidence that Se assimilation by plants and algae followed by deposition and mineralization is the dominant transformation pathway responsible for accumulation of reduced forms of Se in the wetland sediments. JF - Journal of environmental quality AU - Herbel, Mitchell J AU - Johnson, Thomas M AU - Tanji, Kenneth K AU - Gao, Suduan AU - Bullen, Thomas D AD - US Geological Survey, Water Resources Division, Menlo Park, CA 94025, USA. mjherbel@usgs.gov PY - 2002 SP - 1146 EP - 1156 VL - 31 IS - 4 SN - 0047-2425, 0047-2425 KW - Antioxidants KW - 0 KW - Isotopes KW - Selenium KW - H6241UJ22B KW - Index Medicus KW - Environmental Monitoring KW - Ecosystem KW - California KW - Agriculture KW - Plants -- chemistry KW - Geologic Sediments -- chemistry KW - Eukaryota -- chemistry KW - Isotopes -- analysis KW - Antioxidants -- analysis KW - Selenium -- chemistry KW - Selenium -- analysis KW - Water Supply KW - Antioxidants -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71985168?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+quality&rft.atitle=Selenium+stable+isotope+ratios+in+California+agricultural+drainage+water+management+systems.&rft.au=Herbel%2C+Mitchell+J%3BJohnson%2C+Thomas+M%3BTanji%2C+Kenneth+K%3BGao%2C+Suduan%3BBullen%2C+Thomas+D&rft.aulast=Herbel&rft.aufirst=Mitchell&rft.date=2002-07-01&rft.volume=31&rft.issue=4&rft.spage=1146&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+quality&rft.issn=00472425&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2003-01-22 N1 - Date created - 2002-08-14 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Role of ground water in geomorphology, geology, and paleoclimate of the Southern High Plains, USA. AN - 71891767; 12113362 AB - Study of ground water in the Southern High Plains is central to an understanding of the geomorphology, deposition of economic minerals, and climate change record in the area. Ground water has controlled the course of the Canadian and Pecos rivers that isolated the Southern High Plains from the Great Plains and has contributed significantly to the continuing retreat of the westward escarpment. Evaporative and dissolution processes are responsible for current plateau topography and the development of the signature 20,000 small playa basins and 40 to 50 large saline lake basins in the area. In conjunction with eolian processes, ground water transport controls the mineralogy of commercially valuable mineral deposits and sets up the distribution of fine efflorescent salts that adversely affect water quality. As the water table rises and retreats, lunette and tufa formation provides valuable paleoclimate data for the Southern High Plains. In all these cases, an understanding of ground water processes contributes valuable information to a broad range of geological topics, well beyond traditional interest in water supply and environmental issues. JF - Ground water AU - Wood, Warren W AD - National Center, US Geological Survey, Reston, VA 20192, USA. wwwood@usgs.gov PY - 2002 SP - 438 EP - 447 VL - 40 IS - 4 SN - 0017-467X, 0017-467X KW - Soil KW - 0 KW - Index Medicus KW - United States KW - Environmental Monitoring KW - Environment KW - Geological Phenomena KW - Water Movements KW - Climate KW - Water Supply KW - Geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71891767?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+water&rft.atitle=Role+of+ground+water+in+geomorphology%2C+geology%2C+and+paleoclimate+of+the+Southern+High+Plains%2C+USA.&rft.au=Wood%2C+Warren+W&rft.aulast=Wood&rft.aufirst=Warren&rft.date=2002-07-01&rft.volume=40&rft.issue=4&rft.spage=438&rft.isbn=&rft.btitle=&rft.title=Ground+water&rft.issn=0017467X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-12-17 N1 - Date created - 2002-07-12 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Rapid evolution of redox processes in a petroleum hydrocarbon-contaminated aquifer. AN - 71884457; 12113353 AB - Ground water chemistry data collected over a six-year period show that the distribution of contaminants and redox processes in a shallow petroleum hydrocarbon-contaminated aquifer has changed rapidly over time. Shortly after a gasoline release occurred in 1990, high concentrations of benzene were present near the contaminant source area. In this contaminated zone, dissolved oxygen in ground water was depleted, and by 1994 Fe(III) reduction and sulfate reduction were the predominant terminal electron accepting processes. Significantly, dissolved methane was below measurable levels in 1994, indicating the absence of significant methanogenesis. By 1996, however, depletion of solid-phase Fe(III)-oxyhydrox ides in aquifer sediments and depletion of dissolved sulfate in ground water resulted in the onset of methanogenesis. Between 1996 and 2000, water-chemistry data indicated that methanogenic metabolism became increasingly prevalent. Molecular analysis of 16S-rDNA extracted from sediments shows the presence of a more diverse methanogenic community inside as opposed to outside the plume core, and is consistent with water-chemistry data indicating a shift toward methanogenesis over time. This rapid evolution of redox processes reflects several factors including the large amounts of contaminants, relatively rapid ground water flow (approximately 0.3 m/day [approximately foot/day]), and low concentrations of microbially reducible Fe(III) oxyhydroxides ( approximately 1 micromol/g) initially present in aquifer sediments. These results illustrate that, under certain hydrologic conditions, redox conditions in petroleum hydrocarbon-contaminated aquifers can change rapidly in time and space, and that the availability of solid-phase Fe(III)-oxyhydroxides affects this rate of change. JF - Ground water AU - Chapelle, Francis H AU - Bradley, Paul M AU - Lovley, Derek R AU - O'Neill, Kathleen AU - Landmeyer, James E AD - US Geological Survey, Columbia, SC 29210, USA. chapelle@usgs.gov PY - 2002 SP - 353 EP - 360 VL - 40 IS - 4 SN - 0017-467X, 0017-467X KW - Hydrocarbons KW - 0 KW - Petroleum KW - Soil Pollutants KW - Sulfates KW - Water Pollutants KW - Iron KW - E1UOL152H7 KW - Methane KW - OP0UW79H66 KW - Index Medicus KW - Oxidation-Reduction KW - Solubility KW - Methane -- analysis KW - Iron -- chemistry KW - Sulfates -- chemistry KW - Hydrocarbons -- chemistry KW - Hydrocarbons -- analysis KW - Water Pollutants -- analysis KW - Water Supply KW - Soil Pollutants -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71884457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+water&rft.atitle=Rapid+evolution+of+redox+processes+in+a+petroleum+hydrocarbon-contaminated+aquifer.&rft.au=Chapelle%2C+Francis+H%3BBradley%2C+Paul+M%3BLovley%2C+Derek+R%3BO%27Neill%2C+Kathleen%3BLandmeyer%2C+James+E&rft.aulast=Chapelle&rft.aufirst=Francis&rft.date=2002-07-01&rft.volume=40&rft.issue=4&rft.spage=353&rft.isbn=&rft.btitle=&rft.title=Ground+water&rft.issn=0017467X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-12-17 N1 - Date created - 2002-07-12 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - The cranial anatomy of Thalassocnus (Xenarthra, Mammalia), a derived nothrothere from the Neogene of the Pisco Formation (Peru) AN - 52063955; 2002-069268 AB - The Pisco Formation (Miocene-Pliocene) of Peru contains a diverse marine vertebrate fauna. Among the more unusual members of the fauna is the semi-aquatic to aquatic nothrothere sloth, Thalassocnus. Continued fieldwork indicates that, in addition to the late Miocene type species, Thalassocnus natans, the genus is also represented by two additional species in higher horizons of the Pisco Formation. The skull morphology of T. natans is described along with that of Thalassocnus littoralis, sp. nov. and Thalassocnus carolomartini, sp. nov. from the earliest and late early to early late Pliocene, respectively. Many aspects of the cranium of the oldest species of Thalassocnus, T. natans, compare well to those of terrestrial nothrotheres. The terminal species, T. carolomartini, has the most derived features of the skull, absent in all other nothrotheres, that are related to feeding in a marine environment. JF - Journal of Vertebrate Paleontology AU - McDonald, H Gregory AU - de Muizon, Christian Y1 - 2002/07// PY - 2002 DA - July 2002 SP - 349 EP - 365 PB - University of Oklahoma, Norman, OK VL - 22 IS - 2 SN - 0272-4634, 0272-4634 KW - Thalassocnus natans KW - Thalassocnus KW - Thalassocnus littoralis KW - new taxa KW - Cenozoic KW - Theria KW - skull KW - anatomy KW - Thalassocnus carolomartini KW - Pisco Formation KW - Peru KW - taxonomy KW - Eutheria KW - Chordata KW - phylogeny KW - Mammalia KW - Miocene KW - morphology KW - Tertiary KW - South America KW - Xenarthra KW - functional morphology KW - Neogene KW - Megalonychidae KW - marine environment KW - Pliocene KW - Arequipa Peru KW - Vertebrata KW - Nothrotheriidae KW - Edentata KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52063955?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Vertebrate+Paleontology&rft.atitle=The+cranial+anatomy+of+Thalassocnus+%28Xenarthra%2C+Mammalia%29%2C+a+derived+nothrothere+from+the+Neogene+of+the+Pisco+Formation+%28Peru%29&rft.au=McDonald%2C+H+Gregory%3Bde+Muizon%2C+Christian&rft.aulast=McDonald&rft.aufirst=H&rft.date=2002-07-01&rft.volume=22&rft.issue=2&rft.spage=349&rft.isbn=&rft.btitle=&rft.title=Journal+of+Vertebrate+Paleontology&rft.issn=02724634&rft_id=info:doi/ L2 - http://www.bioone.org/loi/vrpa LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2002-01-01 N1 - Number of references - 40 N1 - PubXState - OK N1 - Document feature - illus. incl. 3 tables, geol. sketch map N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - anatomy; Arequipa Peru; Cenozoic; Chordata; Edentata; Eutheria; functional morphology; Mammalia; marine environment; Megalonychidae; Miocene; morphology; Neogene; new taxa; Nothrotheriidae; Peru; phylogeny; Pisco Formation; Pliocene; skull; South America; taxonomy; Tertiary; Tetrapoda; Thalassocnus; Thalassocnus carolomartini; Thalassocnus littoralis; Thalassocnus natans; Theria; Vertebrata; Xenarthra ER - TY - JOUR T1 - Geographic techniques and recent applications of remote sensing to landscape-water quality studies AN - 27169779; 200210-61-0339 (CE); 05392383 (EN) AB - This article overviews recent advances in studies of landscape-water quality relationships using remote sensing techniques. With the increasing feasibility of using remotely-sensed data, landscape-water quality studies can now be more easily performed on regional, multi-state scales. The traditional method of relating land use and land cover to water quality has been extended to include landscape pattern and other landscape information derived from satellite data. Three items are focused on in this article: 1) the increasing recognition of the importance of larger-scale studies of regional water quality that require a landscape perspective; 2) the increasing importance of remotely sensed data, such as the imagery-derived normalized difference vegetation index (NDVI) and vegetation phenological metrics derived from time-series NDVI data; and 3) landscape pattern. In some studies, using landscape pattern metrics explained some of the variation in water quality not explained by land use/cover. However, in some other studies, the NDVI metrics were even more highly correlated to certain water quality parameters than either landscape pattern metrics or land use/cover proportions. Although studies relating landscape pattern metrics to water quality have had mixed results, this recent body of work applying these landscape measures and satellite-derived metrics to water quality analysis has demonstrated their potential usefulness in monitoring watershed conditions across large regions. JF - Water, Air and Soil Pollution AU - Griffith, J A AD - Department of Geography, University of Southern Mississippi, Hattiesburg, MS, U.S.A. Current address: U.S. Geological Survey, EROS Data Center, Sioux Falls, SD 57198, USA griffith@usgs.gov PY - 2002 SP - 181 EP - 197 PB - Kluwer Academic Publishers Group, P.O. Box 989, Dordrecht, 3300AZ, Netherlands, [URL:http://www.wkap.nl] VL - 138 IS - 1-4 SN - 0049-6979, 0049-6979 KW - Civil Engineering (CE); Environmental Engineering (EN) KW - Landscapes KW - Water quality KW - Land use KW - Remote sensing KW - Correlation analysis KW - Watersheds KW - Land KW - Air quality KW - Monitoring KW - Satellites (artificial) KW - Article KW - EE 40:Water Pollution: Monitoring, Control & Remediation (EN) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/27169779?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aenvironmentalengabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water%2C+Air+and+Soil+Pollution&rft.atitle=Geographic+techniques+and+recent+applications+of+remote+sensing+to+landscape-water+quality+studies&rft.au=Griffith%2C+J+A&rft.aulast=Griffith&rft.aufirst=J&rft.date=2002-07-01&rft.volume=138&rft.issue=1-4&rft.spage=181&rft.isbn=&rft.btitle=&rft.title=Water%2C+Air+and+Soil+Pollution&rft.issn=00496979&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2011-11-11 ER - TY - JOUR T1 - A national look at water quality AN - 19856298; 7178653 AB - Most water-quality problems we face today result from diffuse "nonpoint" sources of pollution from agricultural land, urban development, forest harvesting and the atmosphere (U.S. Army Corps of Engineers et al., 1999). It is difficult to quantify nonpoint sources because the contaminants they deliver vary in composition and concentrations from hour to hour and season to season. Moreover, the nature of the contamination is complex and varied. When Congress enacted the Clean Water Act 30 years ago, attention was focused on water-quality issues related to the sanitation of rivers and streams - bacteria counts, oxygen in the water for fish, nutrients, temperature, and salinity. Now, attention is turning to the hundreds of synthetic organic compounds like pesticides used in agricultural and residential areas, volatile organics in solvents and gasoline, microbial and viral contamination, and pharmaceuticals and hormones. JF - Water Resources Impact AU - Gilliom, R J AU - Mueller, D K AU - Zogorski, J S AU - Ryker, S J AD - U.S. Geological Survey, Placer Hall, 6000 J Street, Sacramento, CA 95819, USA, rgilliom@usgs.gov Y1 - 2002/07// PY - 2002 DA - July 2002 SP - 12 EP - 16 VL - 4 IS - 4 SN - 1522-3175, 1522-3175 KW - Virology & AIDS Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Aqualine Abstracts KW - water quality KW - Contamination KW - Gasoline KW - Forests KW - Water resources KW - Nutrients KW - Water quality KW - Toxicity tests KW - Hormones KW - Sanitation KW - Stream Pollution KW - Rivers KW - Nonpoint sources KW - agricultural land KW - Water temperature KW - nutrients KW - Oxygen KW - Pharmaceuticals KW - Contaminants KW - Agricultural pollution KW - Streams KW - Atmosphere KW - Urban planning KW - Agricultural land KW - Salinity effects KW - Volatile compounds KW - Drugs KW - Pollution KW - Bacteria KW - Urban Planning KW - Congress KW - Nonpoint Pollution Sources KW - Temperature KW - Solvents KW - Air pollution KW - USA KW - Volatiles KW - Pesticides KW - Residential areas KW - Clean Water Act KW - Organic compounds KW - Harvesting KW - Pollution control KW - V 22490:Miscellaneous KW - P 2000:FRESHWATER POLLUTION KW - Q5 08505:Prevention and control KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19856298?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Impact&rft.atitle=A+national+look+at+water+quality&rft.au=Gilliom%2C+R+J%3BMueller%2C+D+K%3BZogorski%2C+J+S%3BRyker%2C+S+J&rft.aulast=Gilliom&rft.aufirst=R&rft.date=2002-07-01&rft.volume=4&rft.issue=4&rft.spage=12&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Impact&rft.issn=15223175&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2007-01-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Agricultural pollution; Pesticides; Volatile compounds; Solvents; Water resources; Organic compounds; Water quality; Drugs; Hormones; Toxicity tests; Harvesting; Pollution control; Rivers; Nonpoint sources; Contamination; Gasoline; Forests; Nutrients; Water temperature; Atmosphere; Streams; Oxygen; Agricultural land; Sanitation; Volatiles; Salinity effects; Pharmaceuticals; Contaminants; Pollution; water quality; Congress; Temperature; agricultural land; Air pollution; nutrients; Urban planning; Residential areas; Clean Water Act; Urban Planning; Bacteria; Nonpoint Pollution Sources; Stream Pollution; USA ER - TY - JOUR T1 - Assessing five national priorities in water resources AN - 19481387; 7178654 AB - In 2001, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) began its second decade of studies. A total of 42 study units (major river basins and aquifers across the nation) will be reassessed in three groups of 14 on a rotating schedule. Each group of study units will be studied intensively for three years, followed by six years of low-intensity assessment. One of the primary goals in the second decade is to improve understanding of the key processes that control water-quality conditions in order to establish the links among the sources of contaminants, their transport through the hydrologic system, and the effects of contaminants and physical alterations on stream biota and ecosystems and on the quality of drinking water. An improved understanding of these links will provide the basis for predicting water-quality conditions in unmonitored areas and for predicting the likely effects of contemplated changes in land- and water-management practices. JF - Water Resources Impact AU - Wilber, W G AU - Couch, CA AD - U.S. Geological Survey, 413 National Center, Reston, VA 20192, USA, wgwilber@usgs.gov Y1 - 2002/07// PY - 2002 DA - July 2002 SP - 17 EP - 21 VL - 4 IS - 4 SN - 1522-3175, 1522-3175 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Pollution Abstracts; Aqualine Abstracts KW - Aquifers KW - water quality KW - Hydrologic Systems KW - River Basins KW - Ecosystems KW - geological surveys KW - Pollution dispersion KW - Water resources KW - Geological Surveys KW - Freshwater KW - Ecological Effects KW - Streams KW - Biota KW - Drinking Water KW - Pollutants KW - Assessments KW - Ground water KW - River basins KW - USA KW - Groundwater pollution KW - Groundwater KW - Drinking water KW - P 2000:FRESHWATER POLLUTION KW - Q2 09171:Dynamics of lakes and rivers KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19481387?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Impact&rft.atitle=Assessing+five+national+priorities+in+water+resources&rft.au=Wilber%2C+W+G%3BCouch%2C+CA&rft.aulast=Wilber&rft.aufirst=W&rft.date=2002-07-01&rft.volume=4&rft.issue=4&rft.spage=17&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Impact&rft.issn=15223175&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2007-01-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Pollution dispersion; Ground water; Water resources; River basins; Aquifers; water quality; Biota; Ecosystems; geological surveys; Groundwater pollution; Drinking water; Streams; River Basins; Hydrologic Systems; Drinking Water; Assessments; Pollutants; Geological Surveys; Groundwater; Ecological Effects; USA; Freshwater ER - TY - JOUR T1 - Water-Quality patterns in some of the nation's major river basins and aquifers AN - 19453976; 7178652 AB - In 1991, the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) began evaluating the quality of streams, ground water, and aquatic ecosystems in 51 major river basins and aquifer systems (known as "study units") across the nation. The assessments characterize the ambient water resource - the source of about 60 percent of the nation's drinking water, as well as water for industrial, irrigation, and recreational uses - and thereby complement much of the compliance and regulatory monitoring conducted at the state level and by the U.S. Environmental Protection Agency (USEPA). JF - Water Resources Impact AU - Hamilton, P A AD - Staff Hydrologist, U.S. Geological Survey, 1730 E. Parham Road, Richmond, VA 23228, USA, pahamilt@usgs.gov Y1 - 2002/07// PY - 2002 DA - July 2002 SP - 5 EP - 11 VL - 4 IS - 4 SN - 1522-3175, 1522-3175 KW - ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Aqualine Abstracts KW - Aquifers KW - water quality KW - River Basins KW - Compliance KW - geological surveys KW - Water resources KW - Geological Surveys KW - Water quality KW - Streams KW - Drinking Water KW - Assessments KW - Ground water KW - Environmental monitoring KW - Policies KW - Irrigation KW - River basins KW - Environmental protection KW - irrigation water KW - EPA KW - USA KW - Recreation areas KW - Monitoring KW - aquatic ecosystems KW - Drinking water KW - Groundwater KW - Water Resources KW - P 2000:FRESHWATER POLLUTION KW - Q5 08505:Prevention and control KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19453976?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Impact&rft.atitle=Water-Quality+patterns+in+some+of+the+nation%27s+major+river+basins+and+aquifers&rft.au=Hamilton%2C+P+A&rft.aulast=Hamilton&rft.aufirst=P&rft.date=2002-07-01&rft.volume=4&rft.issue=4&rft.spage=5&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Impact&rft.issn=15223175&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2007-01-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Environmental monitoring; Policies; Irrigation; Ground water; Water resources; River basins; Water quality; Environmental protection; Aquifers; water quality; geological surveys; Compliance; Streams; irrigation water; EPA; Recreation areas; Groundwater; Drinking water; aquatic ecosystems; River Basins; Drinking Water; Assessments; Geological Surveys; Monitoring; Water Resources; USA ER - TY - JOUR T1 - Partial entrainment of gravel bars during floods AN - 18902743; 5523435 AB - Spatial patterns of bed material entrainment by floods were documented at seven gravel bars using arrays of metal washers (bed tags) placed in the streambed. The observed patterns were used to test a general stochastic model that bed material entrainment is a spatially independent, random process where the probability of entrainment is uniform over a gravel bar and a function of the peak dimensionless shear stress tau sub(0)* of the flood. The fraction of tags missing from a gravel bar during a flood, or partial entrainment, had an approximately normal distribution with respect to tau sub(0)* with a mean value (50% of the tags entrained) of 0.085 and standard deviation of 0.022 (root-mean-square error of 0.09). Variation in partial entrainment for a given tau sub(0)* demonstrated the effects of flow conditioning on bed strength, with lower values of partial entrainment after intermediate magnitude floods (0.065 < tau sub(0)* < 0.08) than after higher magnitude floods. Although the probability of bed material entrainment was approximately uniform over a gravel bar during individual floods and independent from flood to flood, regions of preferential stability and instability emerged at some bars over the course of a wet season. Deviations from spatially uniform and independent bed material entrainment were most pronounced for reaches with varied flow and in consecutive floods with small to intermediate magnitudes. JF - Water Resources Research AU - Konrad, C P AU - Booth, D B AU - Burges, S J AU - Montgomery AD - U.S. Geological Survey, Tacoma, WA 98402, USA, cpkonrad@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 VL - 38 IS - 7 SN - 0043-1397, 0043-1397 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Entrainment KW - Bed Load KW - Floods and flooding KW - Spatial Distribution KW - Rainy season KW - Floods KW - Distribution (Mathematical) KW - Shear Stress KW - Sediment transport KW - Sedimentation KW - Data Collections KW - Sand bars KW - Sediment Transport KW - Shear KW - Shear stress KW - Gravel KW - Data collections KW - Model Studies KW - Bed load KW - Transport KW - Q2 09264:Sediments and sedimentation KW - SW 0870:Erosion and sedimentation KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18902743?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Partial+entrainment+of+gravel+bars+during+floods&rft.au=Konrad%2C+C+P%3BBooth%2C+D+B%3BBurges%2C+S+J%3BMontgomery&rft.aulast=Konrad&rft.aufirst=C&rft.date=2002-07-01&rft.volume=38&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000828 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Shear stress; Entrainment; Rainy season; Gravel; Bed load; Floods; Sediment transport; Sedimentation; Sand bars; Shear; Distribution (Mathematical); Transport; Floods and flooding; Data collections; Sediment Transport; Bed Load; Shear Stress; Spatial Distribution; Model Studies; Data Collections DO - http://dx.doi.org/10.1029/2001WR000828 ER - TY - JOUR T1 - Light and Temperature Effects on the Growth of Wild Celery and Hydrilla AN - 18835637; 5510274 AB - Wild celery (Vallisneria americana L.) has coexisted with the dominant species hydrilla (Hydrilla verticillata (L.f.) Royle) since the resurgence of submersed aquatic vegetation in the tidal Potomac River in 1983. In 1989, particularly turbid, cool, and cloudy spring conditions were associated with a substantial decrease in hydrilla coverage. We measured growth and elongation potential of wild celery and hydrilla propagules under various temperature and irradiance conditions to compare these two species and in part explain the stable persistence of wild celery and the variability in hydrilla coverage. A plant growth experiment was conducted to simulate actual temperatures in the Potomac River during spring of 1986 (plant coverage increased) and 1989 (plant coverage decreased). In the 1989 temperature treatment, final heights of hydrilla and wild celery were unaffected by a 6-C decrease in temperature 2 weeks following tuber germination. Heights of wild celery, however, were more than twice that of hydrilla, and elongation rates of wild celery were greater than those of hydrilla when temperatures reached 17 to 22C. Laboratory studies conducted in complete darkness showed that wild celery tubers germinate at 13C, whereas hydrilla tubers germinate at 15C, and that wild celery elongated to heights twice those of hydrilla. Heights were positively correlated to tuber length. If irradiance is diminished at incipience, differences in tuber reserves and elongation potential may be sufficient to ensure that wild celery can survive when hydrilla is not successful. JF - Journal of Aquatic Plant Management AU - Rybicki, N B AU - Carter, V AD - U.S. Geological Survey, 430 National Center, Reston, VA 20192, USA, Nrybicki@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 92 EP - 99 PB - Aquatic Plant Management Society, Inc. VL - 40 IS - 2 SN - 0146-6623, 0146-6623 KW - USA, Potomac R. KW - ASFA 1: Biological Sciences & Living Resources; Water Resources Abstracts KW - Temperature effects KW - Submerged Plants KW - Plant Growth KW - Water Temperature KW - Aquatic plants KW - Brackish KW - Spatial Distribution KW - Hydrilla verticillata KW - Light effects KW - Ecology KW - Light Intensity KW - Plant Populations KW - Vegetation cover KW - Growth KW - Aquatic Plants KW - Comparison Studies KW - Irradiation KW - Vallisneria americana KW - Submergence KW - Q1 08221:General KW - Q1 08424:Age and growth KW - SW 0810:General KW - Q1 08422:Environmental effects UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18835637?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Aquatic+Plant+Management&rft.atitle=Light+and+Temperature+Effects+on+the+Growth+of+Wild+Celery+and+Hydrilla&rft.au=Rybicki%2C+N+B%3BCarter%2C+V&rft.aulast=Rybicki&rft.aufirst=N&rft.date=2002-07-01&rft.volume=40&rft.issue=2&rft.spage=92&rft.isbn=&rft.btitle=&rft.title=Journal+of+Aquatic+Plant+Management&rft.issn=01466623&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Temperature effects; Vegetation cover; Growth; Aquatic plants; Submergence; Light effects; Light Intensity; Ecology; Plant Populations; Aquatic Plants; Water Temperature; Plant Growth; Submerged Plants; Comparison Studies; Irradiation; Spatial Distribution; Vallisneria americana; Hydrilla verticillata; Brackish ER - TY - JOUR T1 - September-March survival of female northern pintails radiotagged in San Joaquin Valley, California AN - 18627090; 5490220 AB - To improve understanding of pintail ecology, we radiotagged 191 hatch-year (HY) and 228 after-hatch-year (AHY) female northern pintails (Anas acuta) in the San Joaquin Valley (SJV), and studied their survival throughout central California, USA, during September-March, 1991-1994. We used adjusted Akaike Information Criterion (AIC sub(c)) values to contrast known-fate models and examine variation in survival rates relative to year, interval, wintering region (SJV, other central California), pintail age, body mass at capture, capture date, capture area, and radio type. The best-fitting model included only interval x year and age x body mass; the next 2 best-fitting models also included wintering region and capture date. Hunting caused 83% of the mortalities we observed, and survival was consistently lower during hunting than nonhunting intervals. Nonhunting and hunting mortality during early winter was highest during the 1991-1992 drought year. Early-winter survival improved during the study along with habitat conditions in the Grassland Ecological Area (EA), where most radiotagged pintails spent early winter. Survival was more closely related to body mass at capture for HY than AHY pintails, even after accounting for the later arrival (based on capture date) of HY pintails, suggesting HY pintails are less adept at improving their condition. Thus, productivity estimates based on harvest age ratios may be biased if relative vulnerability of HY and AHY pintails is assumed to be constant because fall body condition of pintails may vary greatly among years. Cumulative winter survival was 75.6% (95% CI = 68.3% to 81.7%) for AHY and 65.4% (56.7% to 73.1%) for HY female pintails. Daily odds of survival in the cotton-agriculture landscape of the SJV were -21.3% (-40.3% to +3.7%) lower than in the rice-agriculture landscape of the Sacramento Valley (SACV) and other central California areas. Higher hunting mortality may be 1 reason pintails have declined more in SJV than in SACV. JF - Journal of Wildlife Management AU - Fleskes, J P AU - Jarvis, R L AU - Gilmer, D S AD - U.S. Geological Survey, Biological Resources Division, Western Ecological Research Center, 6924 Tremont Road, Dixon, CA 95620, USA, joe_fleskes@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 901 EP - 911 PB - Wildlife Society VL - 66 IS - 3 SN - 0022-541X, 0022-541X KW - Northern pintail KW - Ecology Abstracts KW - D 04700:Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18627090?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Mapping+the+invasive+species+leafy+spurge+%28Euphorbia+esula%29+in+Theodore+Roosevelt+National+Park+using+field+measurements+of+vegetation+spectra+and+imaging+spectroscopy+data&rft.au=Kokaly%2C+Raymond+F%3BRoot%2C+Ralph+R%3BBrown%2C+Karl%3BAnderson%2C+Gerald+L%3BHager%2C+Steve%3BAnonymous&rft.aulast=Kokaly&rft.aufirst=Raymond&rft.date=2002-10-01&rft.volume=34&rft.issue=6&rft.spage=552&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Scaup migration patterns in North Dakota relative to temperatures and water conditions AN - 18627024; 5490218 AB - Greater (Aythya marila) and lesser scaup (A. affinis) have protracted spring migrations. Migrants may still be present on southern breeding areas when the annual Waterfowl Breeding Population and Habitat Surveys (WBPHS) are being conducted. Understanding factors affecting the chronology and rate of spring migration is important for the interpretation of data from annual population surveys. We describe the general temporal pattern of scaup numbers in south-central North Dakota in spring, examine the relationships between scaup numbers and measures of local water conditions and spring temperatures, and assess timing of the WBPHS relative to numbers of scaup occurring in the study area in late May. Scaup were counted weekly on a 95-km, 400-m-wide transect from late March through May, 1957-1999. Average numbers of scaup per count were positively associated with numbers of seasonal, semipermanent, and total ponds. Average minimum daily ambient temperatures showed a trend of increasing temperatures over the 43 years, and dates of peak scaup counts became progressively earlier. Weeks of early migration usually had higher temperatures than weeks of delayed migration. The relationship between temperature and timing of migration was strongest during the second and third weeks of April, which is ~ 1 week before numbers peak (median date = 19 Apr). Trends in sex and pair ratios were not consistent among years. Counts in late May-early June indicated considerable annual variability in the magnitude of late migrants. Scaup numbers during this period seemed to stabilize in only 5 of the 19 years when 2 or more surveys were conducted after the WBPHS. These findings corroborate concerns regarding the accuracy of the WBPHS for representing breeding populations of scaup and the possibility of double-counting scaup in some years. JF - Journal of Wildlife Management AU - Austin, JE AU - Granfors, DA AU - Johnson, MA AU - Kohn, S C AD - U.S. Geological Survey, Northern Prairie Wildlife Research Center, 8711 37th Street S.E., Jamestown, ND 58401, USA, jane_austin@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 874 EP - 882 PB - Wildlife Society VL - 66 IS - 3 SN - 0022-541X, 0022-541X KW - Greater scaup KW - Lesser scaup KW - Animal Behavior Abstracts; Ecology Abstracts KW - D 04671:Birds KW - Y 25656:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18627024?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Wildlife+Management&rft.atitle=Scaup+migration+patterns+in+North+Dakota+relative+to+temperatures+and+water+conditions&rft.au=Austin%2C+JE%3BGranfors%2C+DA%3BJohnson%2C+MA%3BKohn%2C+S+C&rft.aulast=Austin&rft.aufirst=JE&rft.date=2002-07-01&rft.volume=66&rft.issue=3&rft.spage=874&rft.isbn=&rft.btitle=&rft.title=Journal+of+Wildlife+Management&rft.issn=0022541X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Seed chemistry of Sophora chrysophylla (mamane) in relation to diet of specialist avian seed predator Loxioides bailleui (palila) in Hawaii AN - 18490592; 5447236 AB - This study describes the chemical ecology of a tritrophic interaction among species endemic to the island of Hawaii, USA: a tree (Sophora chrysophylla: mamane), an endangered bird (Loxioides bailleui; palila), and moth larvae (Cydia spp.). Palila and Cydia both specialize on the seed embryos of mamane but avoid eating the seed coats. Palila actively seek out and feed mamane embryos and Cydia larvae to their nestlings. Because mamane embryos contain potentially toxic levels of alkaloids, including broadly toxic quinolizidine alkaloids, and because insects often sequester alkaloids from their food plants, we focus on the questions of why palila forage upon mamane embryos and why they supplement their diet with Cydia larvae. Our data show that mamane embryos contain high amounts of potentially toxic alkaloids, but are well balanced nutritionally and contain lipids, carbohydrates, proteins, amino acids, and minerals at levels that are likely to be sufficient for maintenance and breeding. Mamane seed coats contain lower levels of alkaloids and nutrients, somewhat higher levels of phenolics, and much higher levels of nondigestible fiber. Taken together, these results suggest that palila have evolved tolerance to high levels of alkaloids and that they forage upon embryos primarily because of their availability in the habitat and high nutritional reward. Our data also suggest that Cydia are used by palila because they are readily accessible, nontoxic, and nutritious; the larvae apparently do not sequester alkaloids while feeding upon mamane seeds. Our results are interpreted with respect to the likelihood of current and historical coadaptive responses in this ecologically isolated and simplified island setting. JF - Journal of Chemical Ecology AU - Banko, P C AU - Cipollini, M L AU - Breton, G W AU - Paulk, E AU - Wink, M AU - Izhaki, I AD - U.S. Geological Survey, Pacific Island Ecosystems Research Center, Kilauea Field Station, P.O. Box 44, Hawaii National Park, HI 96718, USA, paul_banko@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 1393 EP - 1410 VL - 28 IS - 7 SN - 0098-0331, 0098-0331 KW - Honeycreeper KW - alkaloids KW - Ecology Abstracts KW - D 04671:Birds KW - D 04637:Legumes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18490592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Chemical+Ecology&rft.atitle=Seed+chemistry+of+Sophora+chrysophylla+%28mamane%29+in+relation+to+diet+of+specialist+avian+seed+predator+Loxioides+bailleui+%28palila%29+in+Hawaii&rft.au=Banko%2C+P+C%3BCipollini%2C+M+L%3BBreton%2C+G+W%3BPaulk%2C+E%3BWink%2C+M%3BIzhaki%2C+I&rft.aulast=Banko&rft.aufirst=P&rft.date=2002-07-01&rft.volume=28&rft.issue=7&rft.spage=1393&rft.isbn=&rft.btitle=&rft.title=Journal+of+Chemical+Ecology&rft.issn=00980331&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Island Biogeography of Mammals in Apostle Islands National Lakeshore, USA AN - 18460040; 5435452 AB - We examined the biogeographical distribution of nonvolant mammals among 20 islands in Apostle Islands National Lakeshore, Lake Superior, USA. Species-area relationships were calculated using the power function model (PF; S = cA super(z)) with two different transformations (log S and log S + 1) and the cumulative extreme value function model (EVF) with logistic regression. Island area was positively associated with the number of species present on islands, with R super(2) values of 0.78 (PF, log S), 0.82 (EVF), and 0.87 (PF, log S + 1). The EVF provided a better fit for extreme data values (species proportion [S sub(p)] > 0.9). Degree of isolation did not appear to affect mammalian distribution among islands. However, isolation from the mainland was important in that fewer species that hibernated or were less active in winter colonized islands (P < 0.040). Larger islands supported species with greater body mass (P < 0.001). We conclude that island area and degree of winter activity were dominant factors affecting distribution of nonvolant mammals at Apostle Islands National Lakeshore. Our data also support the incidence function hypothesis in that some species require resources (e.g., large home ranges) supported only by larger islands. For determining species-area relationships, we recommend use of EVF models over PF models, particularly when data include islands with S sub(p) = 0 or when S sub(p) approaches 1. Because of low colonization potential and high extinction rates, development of conservation reserves for terrestrial vertebrates should incorporate species-area relationship data for nonvolant mammals. JF - Natural Areas Journal AU - Belant, J L AU - Van Stappen, JF AD - National Park Service, Pictured Rocks Science Center, Box 40, Munising, MI 49862, USA, jerry_belant@nps.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 180 EP - 185 VL - 22 IS - 3 SN - 0885-8608, 0885-8608 KW - Mammals KW - Ecology Abstracts KW - D 04672:Mammals UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18460040?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Natural+Areas+Journal&rft.atitle=Island+Biogeography+of+Mammals+in+Apostle+Islands+National+Lakeshore%2C+USA&rft.au=Belant%2C+J+L%3BVan+Stappen%2C+JF&rft.aulast=Belant&rft.aufirst=J&rft.date=2002-07-01&rft.volume=22&rft.issue=3&rft.spage=180&rft.isbn=&rft.btitle=&rft.title=Natural+Areas+Journal&rft.issn=08858608&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Intercontinental convergence of stream fish community traits along geomorphic and hydraulic gradients AN - 18447620; 5418799 AB - Community convergence across biogeographically distinct regions suggests the existence of key, repeated, evolutionary mechanisms relating community characteristics to the environment. However, convergence studies at the community level often involve only qualitative comparisons of the environment and may fail to identify which environmental variables drive community structure. We tested the hypothesis that the biological traits of fish communities on two continents (Europe and North America) are similarly related to environmental conditions. Specifically, from observations of individual fish made at the microhabitat scale (a few square meters) within French streams, we generated habitat preference models linking traits of fish species to local scale hydraulic conditions (Froude number). Using this information, we then predicted how hydraulics and geomorphology at the larger scale of stream reaches (several pool-riffle sequences) should quantitatively influence the trait composition of fish communities. Trait composition for fishes in stream reaches with low Froude number at low flow or high proportion of pools was predicted as nonbenthic, large, fecund, long-lived, nonstreamlined, and weak swimmers. We tested our predictions in contrasting stream reaches in France (n = 11) and Virginia, USA (n = 76), using analyses of covariance to quantify the relative influence of continent vs. physical habitat variables on fish traits. The reach-scale convergence analysis indicated that trait proportions in the communities differed between continents (up to 55% of the variance in each trait was explained by "continent"), partly due to distinct evolutionary histories. However, within continents, trait proportions were comparably related to the hydraulic and geomorphic variables (up to 54% of the variance within continents explained). In particular, a synthetic measure of fish traits in reaches was well explained (50% of its variance) by the Froude number independently of the continent. The effect of physical variables did not differ across continents for most traits, confirming our predictions qualitatively and quantitatively. Therefore, despite phylogenetic and historical differences between continents, fish communities of France and Virginia exhibit convergence in biological traits related to hydraulics and geomorphology. This convergence reflects morphological and behavioral adaptations to physical stress in streams. This study supports the existence of a habitat template for ecological strategies. Some key quantitative variables that define this habitat template can be identified by characterizing how individual organisms use their physical environment, and by using dimensionless physical variables that reveal common energetic properties in different systems. Overall, quantitative tests of community convergence are efficient tools to demonstrate that some community traits are predictable from environmental features. JF - Ecology AU - Lamourouz, N AU - Poff, N L AU - Angermeier, P L AD - United States Geological Survey, Virginia Cooperative Fish and Wildlife Research Unit, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0321, USA Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 1792 EP - 1807 PB - Ecological Society of America VL - 83 IS - 7 SN - 0012-9658, 0012-9658 KW - community structure KW - freshwater fish KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Freshwater KW - Q1 01346:Physiology, biochemistry, biophysics KW - Q1 01464:Other aquatic communities KW - Q1 01422:Environmental effects KW - D 04668:Fish UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18447620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecology&rft.atitle=Intercontinental+convergence+of+stream+fish+community+traits+along+geomorphic+and+hydraulic+gradients&rft.au=Lamourouz%2C+N%3BPoff%2C+N+L%3BAngermeier%2C+P+L&rft.aulast=Lamourouz&rft.aufirst=N&rft.date=2002-07-01&rft.volume=83&rft.issue=7&rft.spage=1792&rft.isbn=&rft.btitle=&rft.title=Ecology&rft.issn=00129658&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Dissimilatory arsenate reductase activity and arsenate-respiring bacteria in bovine rumen fluid, hamster feces, and the termite hindgut AN - 18447478; 5421521 AB - Bovine rumen fluid and slurried hamster feces completely reduced millimolar levels of arsenate to arsenite upon incubation under anoxic conditions. This activity was strongly inhibited by autoclaving or aerobic conditions, and partially inhibited by tungstate or chloramphenicol. The rate of arsenate reduction was faster in feces from a population of arsenate-watered (100 ppm) hamsters compared to a control group watered without arsenate. Using radioisotope methods, arsenate reductase activity in hamster feces was also detected at very low concentrations of added arsenate ( similar to 10 mu M). Bacterial cultures were isolated from these materials, as well as from the termite hindgut, that grew using H sub(2) as their electron donor, acetate as their carbon source, and arsenate as their respiratory electron acceptor. The three cultures aligned phylogenetically either with well-established enteric bacteria, or with an organism associated with feedlot fecal wastes. Because arsenite is transported across the gut epithelium more readily than arsenate, microbial dissimilatory reduction of arsenate in the gut may promote the body's absorption of arsenic and hence potentiate its toxicity. JF - FEMS Microbiology Ecology AU - Herbel, MJ AU - Blum, J S AU - Hoeft, SE AU - Cohen, S M AU - Arnold, L L AU - Lisak, J AU - Stolz, J F AU - Oremland, R S AD - US Geological Survey, ms 480, 345 Middlefield Road, Menlo Park, CA 94025, USA, roremlan@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 59 EP - 67 VL - 41 IS - 1 SN - 0168-6496, 0168-6496 KW - Isoptera KW - Termites KW - True cattle KW - arsenate reductase KW - arsenic acid KW - hamsters KW - Microbiology Abstracts B: Bacteriology; Entomology Abstracts KW - J 02728:Enzymes KW - Z 05200:Symbiosis & commensalism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18447478?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=FEMS+Microbiology+Ecology&rft.atitle=Dissimilatory+arsenate+reductase+activity+and+arsenate-respiring+bacteria+in+bovine+rumen+fluid%2C+hamster+feces%2C+and+the+termite+hindgut&rft.au=Herbel%2C+MJ%3BBlum%2C+J+S%3BHoeft%2C+SE%3BCohen%2C+S+M%3BArnold%2C+L+L%3BLisak%2C+J%3BStolz%2C+J+F%3BOremland%2C+R+S&rft.aulast=Herbel&rft.aufirst=MJ&rft.date=2002-07-01&rft.volume=41&rft.issue=1&rft.spage=59&rft.isbn=&rft.btitle=&rft.title=FEMS+Microbiology+Ecology&rft.issn=01686496&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - How many kilojoules does a Black-billed Magpie nest cost? AN - 18443629; 5419602 AB - Energetic costs of nest construction are difficult to estimate for birds, and currently estimates are available for only a handful of species. In this paper, I estimate the minimum cost of nest construction by a pair of Black-billed Magpies (Pica hudsonia). Data on the number of sticks and mud pellets comprising a nest were used to determine the minimum number of trips required to construct the nest, and were combined with information on distances to the nearest sources of nesting materials, data on flight speeds, and bird morphometric measures to estimate costs of transporting nesting materials. For the Black-billed Magpie pair I observed, nest construction required a minimum of 2564 trips for nesting materials, 276.2 km of commuting, 8.4 h of flight, and cost 209.1 kJ. Spreading this cost over the 40 d required to build the nest yields an estimate of 2.61 kJ/adult/day. I compared this value to published estimates of daily metabolizable energy intake for Black-billed Magpies, and calculated that breeding adults would need to increase their daily intake between 0.7% and 1.0% to cover the energetic costs of nest construction. In contrast, egg laying is estimated to require a full 23% of the daily energy expenditure of female magpies. These values suggest the energetic cost of nest building in Black-billed Magpies is relatively insignificant. JF - Journal of Field Ornithology AU - Stanley, T R AD - U.S. Geological Survey, Midcontinent Ecological Science Center, 4512 McMurry Ave., Fort Collins, Colorado 80525 USA, tom_stanley@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 292 EP - 297 PB - Association of Field Ornithologists VL - 73 IS - 3 SN - 0273-8570, 0273-8570 KW - Black-billed Magpie KW - Animal Behavior Abstracts; Ecology Abstracts KW - D 04671:Birds KW - Y 25426:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18443629?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Field+Ornithology&rft.atitle=How+many+kilojoules+does+a+Black-billed+Magpie+nest+cost%3F&rft.au=Stanley%2C+T+R&rft.aulast=Stanley&rft.aufirst=T&rft.date=2002-07-01&rft.volume=73&rft.issue=3&rft.spage=292&rft.isbn=&rft.btitle=&rft.title=Journal+of+Field+Ornithology&rft.issn=02738570&rft_id=info:doi/10.1043%2F0273-8570%282002%29073%280292%3AHMKDAB%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=0273-8570&volume=73&page=292 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/0273-8570(2002)073(0292:HMKDAB)2.0.CO;2 ER - TY - JOUR T1 - HIBAL: a hydrologic-isotopic-balance model for application to paleolake systems AN - 17592861; 5601171 AB - A simple hydrologic-isotopic-balance (HIBAL) model for application to paleolake delta super(18)O records is presented. Inputs to the model include discharge, on-lake precipitation, evaporation, and the delta super(18)O values of these fluid fluxes. Monthly values of climatic parameters that govern the fractionation of super(18)O and super(16)O during evaporation have been extracted from historical data sets and held constant in the model. The ability of the model to simulate changes in the hydrologic balance and the delta super(18)O evolution of the mixed layer has been demonstrated using measured data from Pyramid Lake, Nevada. Simulations of the response in delta super(18)O to step- and periodic- function changes in fluid inputs indicate that the hydrologic balance and delta super(18)O values lag climate change. Input of reconstructed river discharges and their delta super(18)O values to Pyramid and Walker lakes indicates that minima and maxima in simulated delta super(18)O records correspond to minima and maxima in the reconstructed volume records and that the overall shape of the volume and delta super(18)O records is similar. The model was also used in a simulation of abrupt oscillations in the delta super(18)O values of paleo-Owens Lake, California. JF - Quaternary Science Reviews AU - Benson, L AU - Paillet, F AD - US Geological Survey, 3215 Marine Street, Boulder, CO 80303, USA, lbenson@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 1521 EP - 1539 PB - Elsevier Science Ltd. VL - 21 IS - 12-13 SN - 0277-3791, 0277-3791 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - M2 556.55:Lakes, Reservoirs, Ponds (556.55) KW - Q2 02142:Methods and instruments KW - SW 0810:General KW - Q2 02148:Palaeo-studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/17592861?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quaternary+Science+Reviews&rft.atitle=HIBAL%3A+a+hydrologic-isotopic-balance+model+for+application+to+paleolake+systems&rft.au=Benson%2C+L%3BPaillet%2C+F&rft.aulast=Benson&rft.aufirst=L&rft.date=2002-07-01&rft.volume=21&rft.issue=12-13&rft.spage=1521&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/10.1016%2FS0277-3791%2801%2900094-4 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2007-07-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1016/S0277-3791(01)00094-4 ER - TY - JOUR T1 - Denitrification in the recharge area and discharge area of a transient agricultural nitrate plume in a glacial outwash sand aquifer, Minnesota AN - 16145036; 5523436 AB - Recharge rates of nitrate (NO sub(3) super(-)) to groundwater beneath agricultural land commonly are greater than discharge rates of NO sub(3) super(-) in nearby streams, but local controls of NO sub(3) super(-) distribution in the subsurface generally are poorly known. Groundwater dating (CFC, super(3)H) was combined with chemical (ions and gases) and stable isotope (N, S, and C) analyses to resolve the effects of land use changes, flow patterns, and water-aquifer reactions on the distributions of O sub(2), NO sub(3) super(-), SO sub(4) super(=), and other constituents in a two-dimensional vertical section leading from upland cultivated fields to a riparian wetland and stream in a glacial outwash sand aquifer near Princeton, Minnesota. Within this section a "plume" of oxic NO sub(3) super(-)-rich groundwater was present at shallow depths beneath the fields and part of the wetland but terminated before reaching the stream or the wetland surface. Groundwater dating and hydraulic measurements indicate travel times in the local flow system of 0 to >40 years, with stratified recharge beneath the fields, downward diversion of the shallow NO sub(3) super(-)-bearing plume by semiconfining organic-rich valley-filling sediments under the wetland and upward discharge across the valley and stream bottom. The concentrations and delta super(15)N values of NO sub(3) super(-) and N sub(2) indicate that the NO sub(3) super(-) plume section was bounded in three directions by a curvilinear zone of active denitrification that limited its progress; however, when recalculated to remove the effects of denitrification, the data also indicate changes in both the concentrations and delta super(15)N values of NO sub(3) super(-) that was recharged in the past. Isotope data and mass balance calculations indicate that FeS sub(2) and other ferrous Fe phases were the major electron donors for denitrification in at least two settings: (1) within the glacial-fluvial aquifer sediments beneath the recharge and discharge areas and (2) along the bottom of the valley-filling sediments in the discharge area. Combined results indicate that the shape and progress of the oxic NO sub(3) super(-) plume termination were controlled by a combination of (1) historical and spatial variations in land use practices, (2) contrast in groundwater flow patterns between the agricultural recharge area and riparian wetland discharge area, and (3) distribution and abundance of electron donors in both the sand aquifer and valley-filling sediments. The data are consistent with slow migration of redox zones through the aquifer in response to recharging oxic groundwater during Holocene time, then an order-of-magnitude increase in the flux of electron acceptors as a result of agricultural NO sub(3) super(-) contamination in the late twentieth century, to which the redox zone configuration still may be adjusting. The importance of denitrification for NO sub(3) super(-) movement through formerly glaciated terrains should depend on the source areas and depositional environments of the glacial sediments, as well as geomorphology and recent stream-valley sediment history. JF - Water Resources Research AU - Boehlke, J K AU - Wanty, R AU - Tuttle, M AU - Delin, G AU - Landon, M AD - U.S. Geological Survey, 431 National Center, Reston, VA 20192, USA, jkbohlke@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 VL - 38 IS - 7 SN - 0043-1397, 0043-1397 KW - USA, Minnesota KW - ASFA 3: Aquatic Pollution & Environmental Quality; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; Pollution Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Agriculture KW - Aquifers KW - Nitrate KW - Groundwater Discharge KW - Agricultural pollution KW - Hydrogeology KW - Pollution dispersion KW - Spatial Distribution KW - Nitrates in environment KW - Chemical plumes KW - Groundwater recharge KW - Distribution (Mathematical) KW - Denitrification KW - Plumes KW - Recharge KW - USA, Minnesota, Princeton KW - Pollution detection KW - Nitrates KW - Biogeochemistry KW - Groundwater flow KW - Denitrification in soil KW - Fate KW - Glacial Sediments KW - Geohydrology KW - Groundwater pollution KW - Soil (types of) (Glacial) KW - Groundwater Recharge KW - Q5 08503:Characteristics, behavior and fate KW - M3 1010:Issues in Sustainable Development KW - M2 556.33:Aquifers (556.33) KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - SW 0840:Groundwater KW - AQ 00002:Water Quality KW - M2 551.510.3/.4:Physical Properties/Composition (551.510.3/.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16145036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Denitrification+in+the+recharge+area+and+discharge+area+of+a+transient+agricultural+nitrate+plume+in+a+glacial+outwash+sand+aquifer%2C+Minnesota&rft.au=Boehlke%2C+J+K%3BWanty%2C+R%3BTuttle%2C+M%3BDelin%2C+G%3BLandon%2C+M&rft.aulast=Boehlke&rft.aufirst=J&rft.date=2002-07-01&rft.volume=38&rft.issue=7&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000663 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-06-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Chemical plumes; Pollution detection; Denitrification; Agricultural pollution; Pollution dispersion; Groundwater pollution; Fate; Aquifers; Groundwater recharge; Biogeochemistry; Groundwater flow; Denitrification in soil; Nitrates in environment; Nitrates; Plumes; Recharge; Agriculture; Nitrate; Distribution (Mathematical); Hydrogeology; Soil (types of) (Glacial); Groundwater Discharge; Geohydrology; Spatial Distribution; Groundwater Recharge; Glacial Sediments; USA, Minnesota, Princeton DO - http://dx.doi.org/10.1029/2001WR000663 ER - TY - JOUR T1 - Inhibition of erythrocyte delta -aminolevulinic acid dehydratase (ALAD) activity in fish from waters affected by lead smelters AN - 16143015; 5535293 AB - We assessed the effects on fish of lead (Pb) released to streams by smelters located in Trail, BC (Canada), E. Helena, MT, Herculaneum, MO, and Glover, MO. Fish were collected by electrofishing from sites located downstream of smelters and from reference sites. Blood from each fish was analyzed for delta -aminolevulinic acid dehydratase (ALAD) activity and hemoglobin (Hb), and samples of blood, liver, or carcass were analyzed for Pb, zinc (Zn), or both. Fish collected downstream of all four smelters sites had elevated Pb concentrations, decreased ALAD activity, or both relative to their respective reference sites. At E. Helena, fish from the downstream site also had lower Hb concentrations than fish from upstream. Differences among taxa were also apparent. Consistent with previous studies, ALAD activity in catostomids (Pisces: Catostomidae-northern hog sucker, Hypentelium nigricans; river carpsucker, Carpiodes carpio; largescale sucker, Catostomus macrocheilus; and mountain sucker, C. platyrhynchus) seemed more sensitive to Pb-induced ALAD inhibition than the salmonids (Pisces: Salmonidae-rainbow trout, Oncorhynchus mykiss; brook trout, Salvelinus fontinalis) or common carp (Cyprinus carpio). Some of these differences may have resulted from differential accumulation of Zn, which was not measured at all sites. We detected no ALAD activity in channel catfish (Ictalurus punctatus) from either site on the Mississippi River at Herculaneum, MO. Our findings confirmed that Pb is released to aquatic ecosystems by smelters and accumulated by fish, and we documented potentially adverse effects of Pb in fish. We recommend that Zn be measured along with Pb when ALAD activity is used as a biomarker and the collection of at least 10 fish of a species at each site to facilitate statistical analysis. JF - Environmental Monitoring and Assessment AU - Schmitt, C J AU - Caldwell, CA AU - Olsen, B AU - Serdar, D AU - Coffey, M AD - U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, USA, christopher_schmitt@usgs.gov Y1 - 2002/07// PY - 2002 DA - Jul 2002 SP - 99 EP - 119 VL - 77 IS - 1 SN - 0167-6369, 0167-6369 KW - 'd-aminolevulinic acid dehydratase KW - Canada, British Columbia, Trail KW - Channel catfish KW - Common carp KW - European carp KW - Graceful catfish KW - Largescale sucker KW - Mountain sucker KW - Northern hog sucker KW - Rainbow trout KW - River carpsucker KW - Salmonids KW - Suckers KW - USA, Missouri, Glover KW - USA, Missouri, Herculaneum KW - USA, Montana, Helena KW - smelters KW - Toxicology Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources; Aqualine Abstracts; Water Resources Abstracts; Pollution Abstracts KW - Aquatic organisms KW - Catostomus macrocheilus KW - Heavy metals KW - Freshwater KW - Catostomidae KW - Ecological Effects KW - Freshwater fish KW - Ictalurus punctatus KW - Lead KW - Blood (see also Haem---) KW - USA, Missouri KW - Salmonidae KW - Data Collections KW - Canada, British Columbia KW - Oncorhynchus mykiss KW - Inhibition KW - Fish (Catfish families) KW - Streams (in natural channels) KW - Enzyme inhibitors KW - Smelting industry KW - Canada KW - Water Pollution Effects KW - Fish Populations KW - Blood analysis KW - Erythrocytes KW - Pollution effects KW - Hypentelium nigricans KW - Carpiodes carpio KW - Streams KW - Zinc KW - Blood cells KW - USA, Montana KW - Fish (Sucker family) KW - Enzymes KW - Toxicity KW - Smelters KW - Porphobilinogen synthase KW - Blood KW - USA KW - Catostomus platyrhynchus KW - Bioaccumulation KW - Cyprinus carpio KW - Fish (Salmonid) (see also Salmon, Trout) KW - Haemoglobins KW - Q1 08346:Physiology, biochemistry, biophysics KW - P 2000:FRESHWATER POLLUTION KW - X 24166:Environmental impact KW - Q5 08504:Effects on organisms KW - SW 3030:Effects of pollution KW - AQ 00008:Effects of Pollution UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16143015?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Monitoring+and+Assessment&rft.atitle=Inhibition+of+erythrocyte+delta+-aminolevulinic+acid+dehydratase+%28ALAD%29+activity+in+fish+from+waters+affected+by+lead+smelters&rft.au=Schmitt%2C+C+J%3BCaldwell%2C+CA%3BOlsen%2C+B%3BSerdar%2C+D%3BCoffey%2C+M&rft.aulast=Schmitt&rft.aufirst=C&rft.date=2002-07-01&rft.volume=77&rft.issue=1&rft.spage=99&rft.isbn=&rft.btitle=&rft.title=Environmental+Monitoring+and+Assessment&rft.issn=01676369&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-01-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Bioaccumulation; Zinc; Erythrocytes; Pollution effects; Blood cells; Freshwater fish; Lead; Enzyme inhibitors; Haemoglobins; Heavy metals; Smelters; Porphobilinogen synthase; Aquatic organisms; Streams; Blood analysis; Fish (Sucker family); Smelting industry; Blood (see also Haem---); Fish (Salmonid) (see also Salmon, Trout); Fish (Catfish families); Streams (in natural channels); Blood; Water Pollution Effects; Enzymes; Fish Populations; Toxicity; Inhibition; Ecological Effects; Data Collections; Catostomus platyrhynchus; Catostomus macrocheilus; Cyprinus carpio; Oncorhynchus mykiss; Hypentelium nigricans; Carpiodes carpio; Salmonidae; Catostomidae; Ictalurus punctatus; Canada, British Columbia; USA; Canada; USA, Missouri; USA, Montana; Freshwater ER - TY - JOUR T1 - Public health. Worldwide occurrences of arsenic in ground water. AN - 71839668; 12077387 JF - Science (New York, N.Y.) AU - Nordstrom, D Kirk AD - Water Resources Division, U.S. Geological Survey, Boulder, CO 80303, USA. dkn@usgs.gov Y1 - 2002/06/21/ PY - 2002 DA - 2002 Jun 21 SP - 2143 EP - 2145 VL - 296 IS - 5576 KW - Arsenicals KW - 0 KW - Carcinogens KW - Water Pollutants, Chemical KW - Arsenic KW - N712M78A8G KW - Index Medicus KW - United States KW - Oxidation-Reduction KW - Global Health KW - Policy Making KW - Solubility KW - Arsenicals -- analysis KW - Arsenicals -- chemistry KW - Hydrogen-Ion Concentration KW - Geologic Sediments KW - Risk Assessment KW - Arsenic -- chemistry KW - Arsenic -- analysis KW - Water Supply -- analysis KW - Public Health KW - Water Supply -- standards KW - Water Pollutants, Chemical -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71839668?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28New+York%2C+N.Y.%29&rft.atitle=Public+health.+Worldwide+occurrences+of+arsenic+in+ground+water.&rft.au=Nordstrom%2C+D+Kirk&rft.aulast=Nordstrom&rft.aufirst=D&rft.date=2002-06-21&rft.volume=296&rft.issue=5576&rft.spage=2143&rft.isbn=&rft.btitle=&rft.title=Science+%28New+York%2C+N.Y.%29&rft.issn=1095-9203&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-07-23 N1 - Date created - 2002-06-21 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Worldwide Occurrences of Arsenic in Ground Water AN - 16145640; 5401220 AB - As the world population increases beyond 6 billion, one of the most fundamental resources for human survival, clean water, is decreasing. Revised estimates from the World Health Organization for 1990 indicate that 43% of the world's population do not have adequate sanitation and 22% do not have clean drinking water. The rising demands for sanitary water often cannot be met by surface-water supplies. This has led to increased dependence on ground-water resources in many parts of the world. The consequences of ground-water development often include overdrafting, land subsidence, and the use of ground water unfit for human consumption. The recent increased utilization of ground water in India and Bangladesh has caused new health issues. An estimated 36 million people in the Bengal Delta are at risk from drinking arsenic-contaminated water. Numerous other occurrences worldwide have been reported, and some of these, such as those in Taiwan, have been recognized for several decades. JF - Science (Washington) AU - Nordstrom, D K AD - Water Resources Division, U.S. Geological Survey, Boulder, CO 80303, USA, dkn@usgs.gov Y1 - 2002/06/21/ PY - 2002 DA - 2002 Jun 21 SP - 2143 EP - 2145 PB - American Association for the Advancement of Science VL - 296 IS - 5576 SN - 0036-8075, 0036-8075 KW - Health & Safety Science Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Water Resources Abstracts; Risk Abstracts KW - Taiwan KW - Population Dynamics KW - Water resources KW - Groundwater Pollution KW - Freshwater KW - Water quality KW - India KW - Public health KW - Drinking Water KW - Public Health KW - Sanitation KW - Ground water KW - Bangladesh KW - Arsenic KW - Water Quality KW - Water supply KW - Bioaccumulation KW - Groundwater pollution KW - Drinking water KW - H 3000:Environment and Ecology KW - P 2000:FRESHWATER POLLUTION KW - SW 3010:Identification of pollutants KW - R2 23060:Medical and environmental health KW - Q5 08524:Public health, medicines, dangerous organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16145640?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28Washington%29&rft.atitle=Worldwide+Occurrences+of+Arsenic+in+Ground+Water&rft.au=Nordstrom%2C+D+K&rft.aulast=Nordstrom&rft.aufirst=D&rft.date=2002-06-21&rft.volume=296&rft.issue=5576&rft.spage=2143&rft.isbn=&rft.btitle=&rft.title=Science+%28Washington%29&rft.issn=00368075&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-07-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Arsenic; Bioaccumulation; Ground water; Groundwater pollution; Water resources; Water quality; Water supply; Public health; Sanitation; Drinking water; Public Health; Drinking Water; Population Dynamics; Water Quality; Groundwater Pollution; Taiwan; Bangladesh; India; Freshwater ER - TY - JOUR T1 - Recent sediment Studies Refute Glen Canyon Dam Hypothesis AN - 18567620; 5427216 AB - Recent studies of sedimentology, hydrology, and geomorphology indicate that releases from Glen Canyon Dam are continuing to erode sandbars and beaches in the Colorado River in Grand Canyon National Park, despite attempts to restore these resources. The current strategy for dam operations is based on the hypothesis that sand supplied by tributaries of the Colorado River downstream from the dam will accumulate in the channel during normal dam operations and remain available for restoration floods. Recent work has shown that this hypothesis is false, and that tributary sand inputs are exported downstream rapidly, typically within weeks or months under the current flow regime. JF - EOS, Transactions, American Geophysical Union AU - Rubin, D M AU - Topping, D J AU - Schmidt, J C AU - Hazel, J AU - Kaplinski, M AU - Melis, T S AD - U.S. Geological Survey, Pacific Science Center, University of California, Santa Cruz, USA, drubin@usgs.gov Y1 - 2002/06/18/ PY - 2002 DA - 2002 Jun 18 SP - 273 VL - 83 IS - 25 SN - 0096-3941, 0096-3941 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Freshwater KW - SW 0870:Erosion and sedimentation KW - Q2 02264:Sediments and sedimentation KW - M2 556.15:Water Storage (556.15) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18567620?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=EOS%2C+Transactions%2C+American+Geophysical+Union&rft.atitle=Recent+sediment+Studies+Refute+Glen+Canyon+Dam+Hypothesis&rft.au=Rubin%2C+D+M%3BTopping%2C+D+J%3BSchmidt%2C+J+C%3BHazel%2C+J%3BKaplinski%2C+M%3BMelis%2C+T+S&rft.aulast=Rubin&rft.aufirst=D&rft.date=2002-06-18&rft.volume=83&rft.issue=25&rft.spage=273&rft.isbn=&rft.btitle=&rft.title=EOS%2C+Transactions%2C+American+Geophysical+Union&rft.issn=00963941&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Grid-cell-based crop water accounting for the famine early warning system AN - 18569348; 5412131 AB - Rainfall monitoring is a regular activity of food security analysts for sub-Saharan Africa due to the potentially disastrous impact of drought. Crop water accounting schemes are used to track rainfall timing and amounts relative to phenological requirements, to infer water limitation impacts on yield. Unfortunately, many rain gauge reports are available only after significant delays, and the gauge locations leave large gaps in coverage. As an alternative, a grid-cell-based formulation for the water requirement satisfaction index (WRSI) was tested for maize in Southern Africa. Grids of input variables were obtained from remote sensing estimates of rainfall, meteorological models, and digital soil maps. The spatial WRSI was computed for the 1996-97 and 1997-98 growing seasons. Maize yields were estimated by regression and compared with a limited number of reports from the field for the 1996-97 season in Zimbabwe. Agreement at a useful level (r = 0 times 80) was observed. This is comparable to results from traditional analysis with station data. The findings demonstrate the complementary role that remote sensing, modelling, and geospatial analysis can play in an era when field data collection in sub-Saharan Africa is suffering an unfortunate decline. JF - Hydrological Processes AU - Verdin, J AU - Klaver, R AD - Earth Resources Observation Systems (EROS) Data Center, US Geological Survey, Sioux Falls, SD 57198, USA, verdin@usgs.gov Y1 - 2002/06/15/ PY - 2002 DA - 2002 Jun 15 SP - 1617 EP - 1630 VL - 16 IS - 8 SN - 0885-6087, 0885-6087 KW - Africa KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - M2 551.586:Biometeorology and Bioclimatology (551.586) KW - SW 0815:Precipitation KW - M2 551.577:General Precipitation (551.577) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18569348?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrological+Processes&rft.atitle=Grid-cell-based+crop+water+accounting+for+the+famine+early+warning+system&rft.au=Verdin%2C+J%3BKlaver%2C+R&rft.aulast=Verdin&rft.aufirst=J&rft.date=2002-06-15&rft.volume=16&rft.issue=8&rft.spage=1617&rft.isbn=&rft.btitle=&rft.title=Hydrological+Processes&rft.issn=08856087&rft_id=info:doi/10.1002%2Fhyp.1025 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1002/hyp.1025 ER - TY - JOUR T1 - Development of oak plantations established for wildlife AN - 18449308; 5422017 AB - Extensive areas that are currently in agricultural production within the Mississippi Alluvial Valley are being restored to bottomland hardwood forests. Oaks (Quercus sp.), sown as seeds (acorns) or planted as seedlings, are the predominant trees established on most afforested sites. To compare stand development and natural invasion on sites afforested by planting seedlings or by sowing acorns, we sampled woody vegetation on ten 14- to 18-year-old oak plantations established to provide wildlife habitat. Stem densities of about 900oaks/ha were comparable between stands established by sowing 4000acorns/ha and stands established by planting 900seedlings/ha. Densities of oaks in stands established from seedlings increased 38% from densities detected when these stands were 4- to 8-year-old. Densities of oaks established from field-sown acorns increased >100% during this same 10-year span. Oaks that were planted as seedlings were larger than those established from acorns, but trees resulting from either afforestation method were larger than trees naturally colonizing these sites. Natural invasion of woody species varied greatly among afforested sites, but was greater and more diverse on sites sown with acorns. Afforested stands were dominated by planted species, whereas naturally invading species were rare among dominant canopy trees. When afforestation objectives are primarily to provide wildlife habitat, we recommend, sowing acorns rather than planting seedlings. Additionally, planting fewer seeds or seedlings, diversifying the species planted, and leaving non-planted gaps will increase diversity of woody species and promote a more complex forest structure that enhances the suitability of afforested sites for wildlife. JF - Forest Ecology and Management AU - Twedt, D J AU - Wilson, R R AD - USGS Patuxent Wildlife Research Center, 2524 South Frontage Road, Vicksburg, MS 39180, USA, dan_twedt@usgs.gov Y1 - 2002/06/15/ PY - 2002 DA - 2002 Jun 15 SP - 287 EP - 298 PB - Elsevier Science VL - 162 IS - 2-3 SN - 0378-1127, 0378-1127 KW - Oaks KW - Ecology Abstracts KW - D 04700:Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18449308?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Forest+Ecology+and+Management&rft.atitle=Development+of+oak+plantations+established+for+wildlife&rft.au=Twedt%2C+D+J%3BWilson%2C+R+R&rft.aulast=Twedt&rft.aufirst=D&rft.date=2002-06-15&rft.volume=162&rft.issue=2-3&rft.spage=287&rft.isbn=&rft.btitle=&rft.title=Forest+Ecology+and+Management&rft.issn=03781127&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - A passive microwave snow depth algorithm with a proxy for snow metamorphism AN - 1665489054; 5412126 AB - Passive microwave brightness temperatures of snowpacks depend not only on the snow depth, but also on the internal snowpack properties, particularly the grain size, which changes through the winter. Algorithms that assume a constant grain size can yield erroneous estimates of snow depth or water equivalent. For snowpacks that are subject to temperatures well below freezing, the bulk temperature gradient through the snowpack controls the metamorphosis of the snow grains. This study used National Weather Service (NWS) station measurements of snow depth and air temperature from the Northern US Great Plains to determine temporal and spatial variability of the snow depth and bulk snowpack temperature gradient. This region is well suited for this study because it consists primarily of open farmland or prairie, has little relief, is subject to very cold temperatures, and has more than 280 reporting stations. A geostatistical technique called Kriging was used to grid the randomly spaced snow depth measurements. The resulting snow depth maps were then compared with the passive microwave observations from the Special Sensor Microwave Imager (SSM/I). Two snow seasons were examined: 1988-89, a typical snow year, and 1996-97, a record year for snow that was responsible for extensive flooding in the Red River Basin. Inspection of the time series of snow depth and microwave spectral gradient (the difference between the 19 and 37 GHz bands) showed that while the snowpack was constant, the spectral gradient continued to increase. However, there was a strong correlation (0 times 6 < R super(2) < 0 times 9) between the spectral gradient and the cumulative bulk temperature gradient through the snowpack (TGI). Hence, TGI is an index of grain size metamorphism that has occurred within the snowpack. TGI time series from 21 representative sites across the region and the corresponding SSM/I observations were used to develop an algorithm for snow depth that requires daily air temperatures. JF - Hydrological Processes AU - Josberger, E G AU - Mognard, N M AD - US Geological Survey, 1201 Pacific Ave., Tacoma, WA 98402, USA, ejosberg@usgs.gov Y1 - 2002/06/15/ PY - 2002 DA - 2002 Jun 15 SP - 1557 EP - 1568 VL - 16 IS - 8 SN - 0885-6087, 0885-6087 KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - Snowpack KW - Microwave brightness temperatures KW - Microwaves KW - Particle Size KW - Physical Properties KW - Algorithms KW - Temperature KW - Statistical Analysis KW - Snow cover properties KW - Microwave emission from snow cover KW - M2 551.578.46:Snow cover (including depth, temperature and density) KW - SW 0820:Snow, ice and frost UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665489054?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrological+Processes&rft.atitle=A+passive+microwave+snow+depth+algorithm+with+a+proxy+for+snow+metamorphism&rft.au=Josberger%2C+E+G%3BMognard%2C+N+M&rft.aulast=Josberger&rft.aufirst=E&rft.date=2002-06-15&rft.volume=16&rft.issue=8&rft.spage=1557&rft.isbn=&rft.btitle=&rft.title=Hydrological+Processes&rft.issn=08856087&rft_id=info:doi/10.1002%2Fhyp.1020 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Microwave brightness temperatures; Snow cover properties; Microwave emission from snow cover; Snowpack; Microwaves; Particle Size; Physical Properties; Statistical Analysis; Temperature; Algorithms DO - http://dx.doi.org/10.1002/hyp.1020 ER - TY - JOUR T1 - Flow and Storage in Groundwater Systems AN - 18403008; 5395606 AB - The dynamic nature of groundwater is not readily apparent, except where discharge is focused at springs or where recharge enters sinkholes. Yet groundwater flow and storage are continually changing in response to human and climatic stresses. Wise development of groundwater resources requires a more complete understanding of these changes in flow and storage and of their effects on the terrestrial environment and on numerous surface-water features and their biota. JF - Science (Washington) AU - Alley, WM AU - Healy, R W AU - LaBaugh, J W AU - Reilly, TE AD - U.S. Geological Survey, 411 National Center, Reston, VA 20192, USA, walley@usgs.gov Y1 - 2002/06/14/ PY - 2002 DA - 2002 Jun 14 SP - 1985 EP - 1990 PB - American Association for the Advancement of Science VL - 296 IS - 5575 SN - 0036-8075, 0036-8075 KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - M2 556.33:Aquifers (556.33) KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18403008?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28Washington%29&rft.atitle=Flow+and+Storage+in+Groundwater+Systems&rft.au=Alley%2C+WM%3BHealy%2C+R+W%3BLaBaugh%2C+J+W%3BReilly%2C+TE&rft.aulast=Alley&rft.aufirst=WM&rft.date=2002-06-14&rft.volume=296&rft.issue=5575&rft.spage=1985&rft.isbn=&rft.btitle=&rft.title=Science+%28Washington%29&rft.issn=00368075&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Bioavailability of organic matter in a highly disturbed estuary: The role of detrital and algal resources AN - 18400467; 5390413 AB - The importance of algal and detrital food supplies to the planktonic food web of a highly disturbed, estuarine ecosystem was evaluated in response to declining zooplankton and fish populations. We assessed organic matter bioavailability among a diversity of habitats and hydrologic inputs over 2 years in San Francisco Estuary's Sacramento-San Joaquin River Delta. Results show that bioavailable dissolved organic carbon from external riverine sources supports a large component of ecosystem metabolism. However, bioavailable particulate organic carbon derived primarily from internal phytoplankton production is the dominant food supply to the planktonic food web. The relative importance of phytoplankton as a food source is surprising because phytoplankton production is a small component of the ecosystem's organic-matter mass balance. Our results indicate that management plans aimed at modifying the supply of organic matter to riverine, estuarine, and coastal food webs need to incorporate the potentially wide nutritional range represented by different organic matter sources. JF - Proceedings of the National Academy of Sciences, USA AU - Sobczak, W V AU - Cloern, JE AU - Jassby, AD AU - Mueller-Solger, AB AD - U.S. Geological Survey, MS-496, 345 Middlefield Road, Menlo Park, CA 94025, USA, wsobczak@usgs.gov Y1 - 2002/06/11/ PY - 2002 DA - 2002 Jun 11 SP - 8101 EP - 8105 VL - 99 IS - 12 SN - 0027-8424, 0027-8424 KW - Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocean Technology Policy & Non-Living Resources; Ecology Abstracts KW - Brackish KW - O 1070:Ecology/Community Studies KW - Q1 01461:Plankton KW - O 1010:Viruses, Bacteria, Protists, Fungi and Plants KW - Q1 01482:Ecosystems and energetics KW - D 04320:Brackishwater KW - Q1 01226:Physiology, biochemistry, biophysics KW - Q2 02185:Organic compounds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18400467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Proceedings+of+the+National+Academy+of+Sciences%2C+USA&rft.atitle=Bioavailability+of+organic+matter+in+a+highly+disturbed+estuary%3A+The+role+of+detrital+and+algal+resources&rft.au=Sobczak%2C+W+V%3BCloern%2C+JE%3BJassby%2C+AD%3BMueller-Solger%2C+AB&rft.aulast=Sobczak&rft.aufirst=W&rft.date=2002-06-11&rft.volume=99&rft.issue=12&rft.spage=8101&rft.isbn=&rft.btitle=&rft.title=Proceedings+of+the+National+Academy+of+Sciences%2C+USA&rft.issn=00278424&rft_id=info:doi/10.1073%2Fpnas.122614399 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Brackish DO - http://dx.doi.org/10.1073/pnas.122614399 ER - TY - JOUR T1 - Linking the Pacific decadal oscillation to seasonal stream discharge patterns in Southeast Alaska AN - 18575726; 5408394 AB - This study identified and examined differences in Southeast Alaskan streamflow patterns between the two most recent modes of the Pacific decadal oscillation (PDO). Identifying relationships between the PDO and specific regional phenomena is important for understanding climate variability, interpreting historical hydrological variability, and improving water-resources forecasting. Stream discharge data from six watersheds in Southeast Alaska were divided into cold-PDO (1947-1976) and warm-PDO (1977-1998) subsets. For all watersheds, the average annual streamflows during cold-PDO years were not significantly different from warm-PDO years. Monthly and seasonal discharges, however, did differ significantly between the two subsets, with the warm-PDO winter flows being typically higher than the cold-PDO winter flows and the warm-PDO summer flows being typically lower than the cold-PDO flows. These results were consistent with and driven by observed temperature and snowfall patterns for the region. During warm-PDO winters, precipitation fell as rain and ran-off immediately, causing higher than normal winter streamflow. During cold-PDO winters, precipitation was stored as snow and ran off during the summer snowmelt, creating greater summer streamflows. The Mendenhall River was unique in that it experienced higher flows for all seasons during the warm-PDO relative to the cold-PDO. The large amount of Mendenhall River discharge caused by glacial melt during warm-PDO summers offset any flow reduction caused by lack of snow accumulation during warm-PDO winters. The effect of the PDO on Southeast Alaskan watersheds differs from other regions of the Pacific Coast of North America in that monthly/seasonal discharge patterns changed dramatically with the switch in PDO modes but annual discharge did not. JF - Journal of Hydrology (Amsterdam) AU - Neal, E G AU - Walter, M T AU - Coffeen, C AD - US Geological Survey, Water Resources Division, Juneau, AK 99801, USA, egneal@usgs.gov Y1 - 2002/06/10/ PY - 2002 DA - 2002 Jun 10 SP - 188 EP - 197 VL - 263 IS - 1-4 SN - 0022-1694, 0022-1694 KW - USA, Alaska KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Freshwater KW - AQ 00001:Water Resources and Supplies KW - M2 556.53:Rivers, Streams, Canals (556.53) KW - SW 0810:General KW - Q2 02171:Dynamics of lakes and rivers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18575726?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=Linking+the+Pacific+decadal+oscillation+to+seasonal+stream+discharge+patterns+in+Southeast+Alaska&rft.au=Neal%2C+E+G%3BWalter%2C+M+T%3BCoffeen%2C+C&rft.aulast=Neal&rft.aufirst=E&rft.date=2002-06-10&rft.volume=263&rft.issue=1-4&rft.spage=188&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - CPAPER T1 - Species attributes: Non-native species - Plants AN - 39626931; 3671986 AU - Stohlgren, T AU - Patten, D Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 5500:Geoscience KW - U 4300:Environmental Science KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39626931?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Species+attributes%3A+Non-native+species+-+Plants&rft.au=Stohlgren%2C+T%3BPatten%2C+D&rft.aulast=Stohlgren&rft.aufirst=T&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Society for Range Management, 445 Union Blvd., Suite 230, Lakewood, CO 80228, USA; phone: 303-986-3309; fax: 303-986-3892; email: srmden@ix.netcom.com; URL: www.oznet.ksu.edu/srm2002 N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Appropriate scales and metrics for measurement of change in shrubland landscapes AN - 39525953; 3671749 AU - Knick, ST AU - Loveland, T W Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 5500:Geoscience KW - U 4300:Environmental Science KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39525953?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Appropriate+scales+and+metrics+for+measurement+of+change+in+shrubland+landscapes&rft.au=Knick%2C+ST%3BLoveland%2C+T+W&rft.aulast=Knick&rft.aufirst=ST&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Society for Range Management, 445 Union Blvd., Suite 230, Lakewood, CO 80228, USA; phone: 303-986-3309; fax: 303-986-3892; email: srmden@ix.netcom.com; URL: www.oznet.ksu.edu/srm2002 N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Do intermittent streams function as refugia for crayfish? AN - 39524513; 3677510 AU - Magoulick, D D AU - Flinders, CA Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39524513?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Do+intermittent+streams+function+as+refugia+for+crayfish%3F&rft.au=Magoulick%2C+D+D%3BFlinders%2C+CA&rft.aulast=Magoulick&rft.aufirst=D&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: North American Benthological Society, 400 Waterfront Drive, Pittsburgh, PA 15222, USA; fax: 412 442-4328; URL: www.benthos.org N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Visualizing the sea floor: Mapping submarine landscapes AN - 39506660; 3670459 AU - Hutchinson Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 7000:Multidisciplinary UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39506660?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Visualizing+the+sea+floor%3A+Mapping+submarine+landscapes&rft.au=Hutchinson&rft.aulast=Hutchinson&rft.aufirst=&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: American Association for the Advancement of Science, 1333 H St., NW, 8th Floor, Washington, DC 20005, USA; URL: www.aaas.org N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Predicting resistance of undisturbed perennial grasslands to a Bromus tectorum invasion: Soil chemistry, landscape position, native plants and soil food webs AN - 39502003; 3671940 AU - Belnap, J Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 5500:Geoscience KW - U 4300:Environmental Science KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39502003?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Predicting+resistance+of+undisturbed+perennial+grasslands+to+a+Bromus+tectorum+invasion%3A+Soil+chemistry%2C+landscape+position%2C+native+plants+and+soil+food+webs&rft.au=Belnap%2C+J&rft.aulast=Belnap&rft.aufirst=J&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Society for Range Management, 445 Union Blvd., Suite 230, Lakewood, CO 80228, USA; phone: 303-986-3309; fax: 303-986-3892; email: srmden@ix.netcom.com; URL: www.oznet.ksu.edu/srm2002 N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Can state and transition models help us predict and manage biological invasions AN - 39499305; 3671938 AU - Pyke, D Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 5500:Geoscience KW - U 4300:Environmental Science KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39499305?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Can+state+and+transition+models+help+us+predict+and+manage+biological+invasions&rft.au=Pyke%2C+D&rft.aulast=Pyke&rft.aufirst=D&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Society for Range Management, 445 Union Blvd., Suite 230, Lakewood, CO 80228, USA; phone: 303-986-3309; fax: 303-986-3892; email: srmden@ix.netcom.com; URL: www.oznet.ksu.edu/srm2002 N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - US geological survey cooperative water program AN - 39457114; 3671494 AU - Ryan, G L Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 4300:Environmental Science UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39457114?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=US+geological+survey+cooperative+water+program&rft.au=Ryan%2C+G+L&rft.aulast=Ryan&rft.aufirst=G&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: North American Lake Management Society, P.O. Box 5443, 4513 Vernon Blvd., Suite 100, Madison, WI 53705-0443, USA N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Minimum instream flow of the north Fork Shenandoah River, Virginia: A habitat assessment AN - 39444451; 3671662 AU - Krstolic, J Y1 - 2002/06/03/ PY - 2002 DA - 2002 Jun 03 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 5500:Geoscience UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39444451?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Minimum+instream+flow+of+the+north+Fork+Shenandoah+River%2C+Virginia%3A+A+habitat+assessment&rft.au=Krstolic%2C+J&rft.aulast=Krstolic&rft.aufirst=J&rft.date=2002-06-03&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: Virginia Lakes and Watershed Association, 3428 Mansfield Road, Falls Church, VA 22041, USA; phone: 703-820-7700; URL: www.gky.com/vlwa/index.htm N1 - Last updated - 2010-05-03 ER - TY - JOUR T1 - Movement of water through the thick unsaturated zone underlying Oro Grande and Sheep Creek Washes in the western Mojave Desert, USA AN - 860393225; 14382501 AB - Previous studies indicate that a small quantity of recharge occurs from infiltration of streamflow in intermittent streams in the upper Mojave River basin, in the western Mojave Desert, near Victorville, California. Chloride, tritium, and stable isotope data collected in the unsaturated zone between 1994 and 1998 from boreholes drilled in Oro Grande and Sheep Creek Washes indicate that infiltration of streamflow occurs to depths below the root zone, and presumably to the water table, along much of Oro Grande Wash and near the mountain front along Sheep Creek Wash. Differences in infiltration at sites along each wash are the result of hydrologic variables such as proximity to the mountain front, quantity of streamflow, and texture of the subsurface deposits. Differences in infiltration between the washes are the result of large-scale geomorphic processes. For example, Oro Grande wash is incised into the Victorville fan and infiltration has occurred at approximately the same location over recent geologic time. In contrast, Sheep Creek Wash overlies an active alluvial fan and the stream channel can move across the fan surface through time. Infiltration does not occur to depths below the root zone at control sites outside of the washes.Original Abstract: Des etudes precedentes indiquent qu'une faible part de la recharge est assuree par l'infiltration d'ecoulement de surface dans des cours temporaires du bassin superieur de la riviere Mojave, dans la partie occidentale du desert Mojave, pres de Victorville (Californie). Des donnees portant sur les chlorures, le tritium et les isotopes stables, recueillies dans la zone non saturee entre 1994 et 1998 grace a des forages realises dans les fonds de vallees d'Oro Grande et de Sheep Creek, montrent que l'infiltration des ecoulement de surface se produit en profondeur sous la zone racinaire, et probablement jusqu'a la nappe, le long de la plus grande partie du cours de l'Oro Grande et au pied des montagnes le long de celui de Sheep Creek. Des differences dans l'infiltration aux sites le long de chacun des fonds de vallee sont la consequence de variables hydrologiques comme la proximite du pied des montagnes, la quantite d'ecoulement de surface et la texture des depots. Des differences dans l'infiltration entre les fonds de vallee resultent de processus geomorphologiques a grande echelle. Par exemple, le vallon de l'Oro Grande entaille le cone de dejection de Victorville et l'infiltration s'est toujours produite a peu pres au meme endroit lors des epoques geologiques recentes. Au contraire, le fonds de la vallee de Sheep Creek passe sur un cone alluvial actif et le lit du cours d'eau peut divaguer a la surface du cone au cours du temps. L'infiltration ne se produit pas en profondeur sous la zone racinaire dans les sites hors des fonds de vallee. JF - Hydrogeology Journal AU - Izbicki, John A AU - Radyk, John AU - Michel, Robert L AD - US Geological Survey, San Diego, CA 92123, USA, jaizbick@usgs.gov Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 409 EP - 427 PB - Springer-Verlag, P.O. Box 2485 Secaucus NJ 07096-2485 USA VL - 10 IS - 3 SN - 1431-2174, 1431-2174 KW - Environment Abstracts; Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Aeration Zone KW - Isotopes KW - Sheep KW - Chlorides KW - Water table KW - Freshwater KW - Boreholes KW - Streams KW - Flow rates KW - Mountains KW - Geomorphology KW - INE, USA, California KW - Geology KW - USA, California KW - Streamflow KW - River basins KW - Creek KW - USA, California, Mojave R. KW - Stream flow KW - USA, California, Mojave Desert KW - Root Zone KW - Deserts KW - Tritium KW - Infiltration KW - Subsurface deposits KW - SW 5040:Data acquisition KW - AQ 00006:Sewage KW - Q2 09264:Sediments and sedimentation KW - ENA 07:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/860393225?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Movement+of+water+through+the+thick+unsaturated+zone+underlying+Oro+Grande+and+Sheep+Creek+Washes+in+the+western+Mojave+Desert%2C+USA&rft.au=Izbicki%2C+John+A%3BRadyk%2C+John%3BMichel%2C+Robert+L&rft.aulast=Izbicki&rft.aufirst=John&rft.date=2002-06-01&rft.volume=10&rft.issue=3&rft.spage=409&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-002-0194-8 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-04-01 N1 - Last updated - 2016-04-13 N1 - SubjectsTermNotLitGenreText - Geomorphology; Tritium; Deserts; Water table; Subsurface deposits; River basins; Creek; Streams; Stream flow; Isotopes; Sheep; Chlorides; Boreholes; Flow rates; Mountains; Infiltration; Geology; Aeration Zone; Root Zone; Streamflow; USA, California, Mojave Desert; INE, USA, California; USA, California; USA, California, Mojave R.; Freshwater DO - http://dx.doi.org/10.1007/s10040-002-0194-8 ER - TY - JOUR T1 - Atmospherc mercury deposition during the last 270 years: a glacial ice core record of natural and anthropogenic sources. AN - 71847413; 12075781 AB - Mercury (Hg) contamination of aquatic ecosystems and subsequent methylmercury bioaccumulation are significant environmental problems of global extent. At regional to global scales, the primary mechanism of Hg contamination is atmospheric Hg transport. Thus, a better understanding of the long-term history of atmospheric Hg cycling and quantification of the sources is critical for assessing the regional and global impact of anthropogenic Hg emissions. Ice cores collected from the Upper Fremont Glacier (UFG), Wyoming, contain a high-resolution record of total atmospheric Hg deposition (ca. 1720-1993). Total Hg in 97 ice-core samples was determined with trace-metal clean handling methods and low-level analytical procedures to reconstruct the first and most comprehensive atmospheric Hg deposition record of its kind yet available from North America. The record indicates major atmospheric releases of both natural and anthropogenic Hg from regional and global sources. Integrated over the past 270-year ice-core history, anthropogenic inputs contributed 52%, volcanic events 6%, and background sources 42%. More significantly, during the last 100 years, anthropogenic sources contributed 70% of the total Hg input. Unlike the 2-7-fold increase observed from preindustrial times (before 1840) to the mid-1980s in sediment-core records, the UFG record indicates a 20-fold increase for the same period. The sediment-core records, however, are in agreement with the last 10 years of this ice-core record, indicating declines in atmospheric Hg deposition. JF - Environmental science & technology AU - Schuster, Paul F AU - Krabbenhoft, David P AU - Naftz, David L AU - Cecil, L Dewayne AU - Olson, Mark L AU - Dewild, John F AU - Susong, David D AU - Green, Jaromy R AU - Abbott, Micheal L AD - U.S. Geological Survey, Boulder, Colorado 80303, USA. pschuste@usgs.gov Y1 - 2002/06/01/ PY - 2002 DA - 2002 Jun 01 SP - 2303 EP - 2310 VL - 36 IS - 11 SN - 0013-936X, 0013-936X KW - Air Pollutants KW - 0 KW - Ice KW - Mercury KW - FXS1BY2PGL KW - Index Medicus KW - Environmental Monitoring KW - Wyoming KW - History, 20th Century KW - History, 18th Century KW - Retrospective Studies KW - History, 19th Century KW - Volcanic Eruptions KW - Mercury -- history KW - Geologic Sediments -- chemistry KW - Mercury -- analysis KW - Air Pollutants -- analysis KW - Air Pollutants -- history UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71847413?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Atmospherc+mercury+deposition+during+the+last+270+years%3A+a+glacial+ice+core+record+of+natural+and+anthropogenic+sources.&rft.au=Schuster%2C+Paul+F%3BKrabbenhoft%2C+David+P%3BNaftz%2C+David+L%3BCecil%2C+L+Dewayne%3BOlson%2C+Mark+L%3BDewild%2C+John+F%3BSusong%2C+David+D%3BGreen%2C+Jaromy+R%3BAbbott%2C+Micheal+L&rft.aulast=Schuster&rft.aufirst=Paul&rft.date=2002-06-01&rft.volume=36&rft.issue=11&rft.spage=2303&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-12-11 N1 - Date created - 2002-06-21 N1 - Date revised - 2017-01-13 N1 - SuppNotes - Comment In: Environ Sci Technol. 2002 Jun 1;36(11):231A-232A [12075784] N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Morphology, volcanism, and mass wasting in Crater Lake, Oregon AN - 52100289; 2002-042997 AB - Crater Lake was surveyed nearly to its shoreline by high-resolution multibeam echo sounding in order to define its geologic history and provide an accurate base map for research and monitoring surveys. The bathymetry and acoustic backscatter reveal the character of landforms and lead to a chronology for the concurrent filling of the lake and volcanism within the ca. 7700 calibrated yr B.P. caldera. The andesitic Wizard Island and central-platform volcanoes are composed of sequences of lava deltas that record former lake levels and demonstrate simultaneous activity at the two vents. Wizard Island eruptions ceased when the lake was approximately 80 m lower than at present. Lava streams from prominent channels on the surface of the central platform descended to feed extensive subaqueous flow fields on the caldera floor. The Wizard Island and central-platform volcanoes, andesitic Merriam Cone, and a newly discovered probable lava flow on the eastern floor of the lake apparently date from within a few hundred years of caldera collapse, whereas a small rhyodacite dome was emplaced on the flank of Wizard Island at ca. 4800 cal. yr B.P. Bedrock outcrops on the submerged caldera walls are shown in detail and, in some cases, can be correlated with exposed geologic units of Mount Mazama. Fragmental debris making up the walls elsewhere consists of narrow talus cones forming a dendritic pattern that leads to fewer, wider ridges downslope. Hummocky topography and scattered blocks up to approximately 280 m long below many of the embayments in the caldera wall mark debris-avalanche deposits that probably formed in single events and commonly are affected by secondary failures. The flat-floored, deep basins contain relatively fine-grained sediment transported from the debris aprons by sheet-flow turbidity currents. Crater Lake apparently filled rapidly (ca. 400-750 yr) until reaching a permeable layer above glaciated lava identified by the new survey in the northeast caldera wall at approximately 1845 m elevation. Thereafter, a gradual, climatically modulated rise in lake level to the present 1883 m produced a series of beaches culminating in a modern wave-cut platform, commonly approximately 40 m wide, where suitable material is present. The new survey reveals landforms that result from intermediate-composition volcanism in rising water, delineates mass wasting and sediment transport into a restricted basin, and yields a more accurate postcaldera history leading to improved assessment of volcanic hazards. JF - Geological Society of America Bulletin AU - Bacon, Charles R AU - Gardner, James V AU - Mayer, Larry A AU - Buktenica, Mark W AU - Dartnell, Peter AU - Ramsey, David W AU - Robinson, Joel E Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 675 EP - 692 PB - Geological Society of America (GSA), Boulder, CO VL - 114 IS - 6 SN - 0016-7606, 0016-7606 KW - United States KW - lake-level changes KW - geophysical surveys KW - lakes KW - national parks KW - Crater Lake KW - landforms KW - Klamath County Oregon KW - debris flows KW - crater lakes KW - Holocene KW - Cenozoic KW - Oregon KW - acoustical methods KW - volcanic features KW - volcanism KW - bottom features KW - mass movements KW - hydrology KW - high-resolution methods KW - Quaternary KW - lava flows KW - echo sounding KW - geophysical methods KW - Wizard Island KW - public lands KW - morphology KW - Cascade Range KW - calderas KW - limnology KW - eruptions KW - surveys KW - bathymetry KW - domes KW - 23:Geomorphology KW - 20:Applied geophysics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52100289?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geological+Society+of+America+Bulletin&rft.atitle=Morphology%2C+volcanism%2C+and+mass+wasting+in+Crater+Lake%2C+Oregon&rft.au=Bacon%2C+Charles+R%3BGardner%2C+James+V%3BMayer%2C+Larry+A%3BBuktenica%2C+Mark+W%3BDartnell%2C+Peter%3BRamsey%2C+David+W%3BRobinson%2C+Joel+E&rft.aulast=Bacon&rft.aufirst=Charles&rft.date=2002-06-01&rft.volume=114&rft.issue=6&rft.spage=675&rft.isbn=&rft.btitle=&rft.title=Geological+Society+of+America+Bulletin&rft.issn=00167606&rft_id=info:doi/ L2 - http://www.gsajournals.org/gsaonline/?request=get-abstract&issn=0016-7606&volume=0114&issue=06&page=0675 http://www.gsajournals.org/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - Number of references - 53 N1 - PubXState - CO N1 - Document feature - illus. incl. 2 tables, geol. sketch map N1 - Last updated - 2012-06-07 N1 - CODEN - BUGMAF N1 - SubjectsTermNotLitGenreText - acoustical methods; bathymetry; bottom features; calderas; Cascade Range; Cenozoic; Crater Lake; crater lakes; debris flows; domes; echo sounding; eruptions; geophysical methods; geophysical surveys; high-resolution methods; Holocene; hydrology; Klamath County Oregon; lake-level changes; lakes; landforms; lava flows; limnology; mass movements; morphology; national parks; Oregon; public lands; Quaternary; surveys; United States; volcanic features; volcanism; Wizard Island ER - TY - JOUR T1 - Coalbed methane in Northern Alaska; potential resources for rural use and added supply for the proposed Trans-Alaska gas pipeline AN - 52076419; 2002-062448 AB - Coalbed methane (CBM) in northern Alaska is important because of the need for affordable, local energy sources in remote communities and because of the potential addition of gas supplies to the proposed trans-Alaska gas pipeline. In the western Colville sub-basin of the North Slope Basin, the Cretaceous Nanushuk Formation contains up to 150 coal seams ranging in thickness from five to 28 ft over a 40,000 square mile area. Near Wainwright, Nanushuk coals have a 0.4 to 0.5% mean random vitrinite reflectance (Rv-r) at the surface and this increases to about 0.6% Rv-r at 2000 ft depth. At this depth, adsorption isotherm analysis indicates a gas storage capacity of 80 scf/ton (as received basis) if the coal is gas-saturated. The North Slope Basin also contains Late Cretaceous to Tertiary Sagavanirktok Formation coals, with beds up to 30 ft thick and net coal thickness locally exceeding 150 ft. Geophysical logs indicate Sagavanirktok coals underlie about 2000 mi2 between the Prudhoe Bay area and outcrops 70 miles to the south. Sagavanirktok coals are about 0.3% Rv-r at the surface and increase to near 0.6% Rv-r at 6000 ft depth in the Prudhoe Bay area. Preliminary resource calculations indicate a geologic potential of about 800 TCF of CBM in the North Slope Basin. By comparison, proven conventional natural gas reserves in the North Slope basin are only 31 TCF. Thus, the capacity of the proposed gas pipeline needs to be designed to handle potential CBM supplies as well as conventional gas. JF - AAPG Bulletin AU - Barker, C E AU - Clough, J G AU - Roberts, S B AU - Fisk, R AU - Anonymous Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 1135 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 86 IS - 6 SN - 0149-1423, 0149-1423 KW - United States KW - resources KW - Colville Basin KW - Cretaceous KW - vitrinite KW - natural gas KW - petroleum KW - gas storage KW - Prudhoe Bay KW - coal seams KW - Nanushuk Group KW - thickness KW - supply KW - macerals KW - well logs KW - North Slope KW - adsorption KW - Mesozoic KW - Wainwright Alaska KW - isotherms KW - Northern Alaska KW - Trans-Alaska Pipeline KW - coalbed methane KW - rural environment KW - Alaska KW - Sagavanirktok Formation KW - reflectance KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52076419?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AAPG+Bulletin&rft.atitle=Coalbed+methane+in+Northern+Alaska%3B+potential+resources+for+rural+use+and+added+supply+for+the+proposed+Trans-Alaska+gas+pipeline&rft.au=Barker%2C+C+E%3BClough%2C+J+G%3BRoberts%2C+S+B%3BFisk%2C+R%3BAnonymous&rft.aulast=Barker&rft.aufirst=C&rft.date=2002-06-01&rft.volume=86&rft.issue=6&rft.spage=1135&rft.isbn=&rft.btitle=&rft.title=AAPG+Bulletin&rft.issn=01491423&rft_id=info:doi/ L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - AAPG Pacific Section and SPE Western Region conference; Energy frontiers; a 2002 perspective joint conference of geoscientists and petroleum engineers N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2002-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - adsorption; Alaska; coal seams; coalbed methane; Colville Basin; Cretaceous; gas storage; isotherms; macerals; Mesozoic; Nanushuk Group; natural gas; North Slope; Northern Alaska; petroleum; Prudhoe Bay; reflectance; resources; rural environment; Sagavanirktok Formation; supply; thickness; Trans-Alaska Pipeline; United States; vitrinite; Wainwright Alaska; well logs ER - TY - JOUR T1 - High resolution outcrop stratigraphy and surface-to-subsurface correlation of Upper Triassic rocks, Northern Alaska AN - 52075012; 2002-062564 AB - Sequence stratigraphic, biostratigraphic, and geochemical analyses of Upper Triassic rocks in the northern Brooks Range have provided new insight into correlation and deposition of Triassic source rocks in Arctic Alaska. Detailed outcrop studies of the Shublik, Otuk and adjacent formations in the northeastern (Fire Creek, Shublik Mts.) and central Brooks Range (Atigun Gorge, Tiglukpuk Creek) provide stratigraphic data comparable to recent subsurface analyses of coeval units near Prudhoe Bay. Facies stacking patterns in outcrop and the subsurface display similar stratigraphic discontinuities and landward and seaward stepping patterns that permit detailed surface-to-subsurface correlations. Two complete third order sequences and part of a third sequence are recorded by these units. All outcrop sections represent relatively distal depositional settings. A significant erosional unconformity is recorded only at the base of Sequence 1 at Fire Creek. The base of Sequences 2 and 3 are characterized by pebbly phosphorites or bedded cherts that indicate significant transgressive surfaces that subdivide these units into additional genetic sequences. Outcrop gamma-ray and scintilometer data facilitated correlation between the surface and subsurface. Biostratigraphic data from the subsurface and Atigun Gorge indicate that all three sequences fall within the Carnian and Norian stages of the Late Triassic. Organic geochemical data show >5% TOC in some Otuk samples. and imply that the richest source rocks accumulated during mid-sequence maximum flooding. These Triassic oil-prone source rocks were deposited across much of eastern Arctic Alaska and may be a hydrocarbon source in the Brooks Range thrust belt and southern foothills of the Colville basin. JF - AAPG Bulletin AU - Whalen, M T AU - Kelly, L N AU - Mull, C Gil AU - Mickey, M B AU - Banet, A C AU - Hulm, E J AU - Anonymous Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 1163 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 86 IS - 6 SN - 0149-1423, 0149-1423 KW - United States KW - Colville Basin KW - Otuk Formation KW - source rocks KW - petroleum KW - Prudhoe Bay KW - Shublik Mountains KW - transgression KW - Triassic KW - total organic carbon KW - stacking KW - Upper Triassic KW - outcrops KW - geochemistry KW - sequence stratigraphy KW - high-resolution methods KW - patterns KW - well logs KW - biostratigraphy KW - Atigun Gorge KW - correlation KW - Mesozoic KW - lithofacies KW - sea-level changes KW - organic compounds KW - deposition KW - Northern Alaska KW - Alaska KW - Shublik Formation KW - Brooks Range KW - Tiglukpuk Creek KW - Fire Creek KW - 29A:Economic geology, geology of energy sources KW - 12:Stratigraphy UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52075012?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AAPG+Bulletin&rft.atitle=High+resolution+outcrop+stratigraphy+and+surface-to-subsurface+correlation+of+Upper+Triassic+rocks%2C+Northern+Alaska&rft.au=Whalen%2C+M+T%3BKelly%2C+L+N%3BMull%2C+C+Gil%3BMickey%2C+M+B%3BBanet%2C+A+C%3BHulm%2C+E+J%3BAnonymous&rft.aulast=Whalen&rft.aufirst=M&rft.date=2002-06-01&rft.volume=86&rft.issue=6&rft.spage=1163&rft.isbn=&rft.btitle=&rft.title=AAPG+Bulletin&rft.issn=01491423&rft_id=info:doi/ L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - AAPG Pacific Section and SPE Western Region conference; Energy frontiers; a 2002 perspective joint conference of geoscientists and petroleum engineers N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2002-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - Alaska; Atigun Gorge; biostratigraphy; Brooks Range; Colville Basin; correlation; deposition; Fire Creek; geochemistry; high-resolution methods; lithofacies; Mesozoic; Northern Alaska; organic compounds; Otuk Formation; outcrops; patterns; petroleum; Prudhoe Bay; sea-level changes; sequence stratigraphy; Shublik Formation; Shublik Mountains; source rocks; stacking; Tiglukpuk Creek; total organic carbon; transgression; Triassic; United States; Upper Triassic; well logs ER - TY - JOUR T1 - Paleo source-rock characteristics of the Kuna Formation in the western Brooks Range AN - 52072219; 2002-062446 AB - Exposures of the Kuna Formation (Mississippian) in the Wulik River area of the westernmost Brooks Range are composed of interbedded black shale, mudstone and chert. These basinal facies are equivalent (or partially equivalent) to the Kayak Shale and the Utukok Formation of the Lisburne Group, which are exposed on nearby multiply repeated thrust sheets. The unfaulted Kuna is up to six hundred feet thick. Hand-held scintillometer surveys provide a quick, inexpensive first look at potential source rocks and a tool to assist in correlating with well logs. Measurements of three sections show that the shale facies of the Kuna yields scintillometer profiles comparable to other North Slope source facies. The Kuna contains up to 14% total organic carbon (TOC), however thermal maturities are well beyond the petroleum generation, as is expected considering the tectonic regime in this area. Base metal exploration in the western Brooks Range shows that the Kuna is multiply repeated in thrust sheets and may have potential for natural gas. Although the areal extent of the Kuna is not well constrained, its organic-rich facies may have played an integral part of Brookian orogenic activities. An early phase of hydrocarbon generation from the Kuna may be related to enigmatic bitumen found in Lisburne limestones in the Brooks Range. Its gas resource potential may be tested soon. JF - AAPG Bulletin AU - Banet, A C AU - Evans, K R AU - Anonymous Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 1135 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 86 IS - 6 SN - 0149-1423, 0149-1423 KW - Utukok Formation KW - United States KW - resources KW - Mississippian KW - Lower Mississippian KW - source rocks KW - petroleum KW - sedimentary rocks KW - thermal maturity KW - thickness KW - scintillometers KW - Kayak Shale KW - chemically precipitated rocks KW - well logs KW - mudstone KW - Brookian Orogeny KW - shale KW - Paleozoic KW - thrust sheets KW - Kuna Formation KW - Carboniferous KW - Wulik River KW - measurement KW - genesis KW - lithofacies KW - Northern Alaska KW - chert KW - Alaska KW - Brooks Range KW - Lisburne Group KW - clastic rocks KW - instruments KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52072219?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=AAPG+Bulletin&rft.atitle=Paleo+source-rock+characteristics+of+the+Kuna+Formation+in+the+western+Brooks+Range&rft.au=Banet%2C+A+C%3BEvans%2C+K+R%3BAnonymous&rft.aulast=Banet&rft.aufirst=A&rft.date=2002-06-01&rft.volume=86&rft.issue=6&rft.spage=1135&rft.isbn=&rft.btitle=&rft.title=AAPG+Bulletin&rft.issn=01491423&rft_id=info:doi/ L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - AAPG Pacific Section and SPE Western Region conference; Energy frontiers; a 2002 perspective joint conference of geoscientists and petroleum engineers N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2002-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - Alaska; Brookian Orogeny; Brooks Range; Carboniferous; chemically precipitated rocks; chert; clastic rocks; genesis; instruments; Kayak Shale; Kuna Formation; Lisburne Group; lithofacies; Lower Mississippian; measurement; Mississippian; mudstone; Northern Alaska; Paleozoic; petroleum; resources; scintillometers; sedimentary rocks; shale; source rocks; thermal maturity; thickness; thrust sheets; United States; Utukok Formation; well logs; Wulik River ER - TY - JOUR T1 - Weird scenes inside the gold mine; finding debris from the Avak impact AN - 52072103; 2002-062447 AB - The Geologic Materials Center (GMC) in Eagle River is the Alaska repository for cores and cuttings from numerous petroleum and mineral exploration activities. The GMC is a valuable storehouse of hard data without which so much logging and geophysical data are merely measurements. In addition to petroleum and exploration data, the GMC repository also provides insights geological questions. The Avak impact is the northernmost impact feature of the known Cretaceous seaway impacts. Core and cuttings from the Cape Simpson area show allochthonous lithologies, including coarse and angular fragments of sandstone and argillite that are similar in appearance to the debris described from the Avak well core. These sandstone and argillite fragments are suspended in a matrix of soft gray clay. Well correlations and paleo data show this unit is the upper Cretaceous Seabee Shale (shale of the Colville Group). If the debris found in the Simpson area proves to correlate to the Avak impact, it's level within the Seabee Formation could provide a more precise age estimate than previous workers. JF - AAPG Bulletin AU - Banet, A C AU - Anonymous Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 1135 PB - American Association of Petroleum Geologists, Tulsa, OK VL - 86 IS - 6 SN - 0149-1423, 0149-1423 KW - United States KW - argillite KW - Cape Simpson KW - Avak Structure KW - allochthons KW - impact features KW - Eagle River KW - Cretaceous KW - shale KW - sandstone KW - cuttings KW - Upper Cretaceous KW - Mesozoic KW - cores KW - sedimentary rocks KW - Seabee Formation KW - Alaska KW - clastic rocks KW - Colville Group KW - 23:Geomorphology KW - 06A:Sedimentary petrology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52072103?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Government+Information+Quarterly&rft.atitle=The+National+Biological+Information+Infrastructure+as+an+E-Government+Tool&rft.au=Sepic%2C+Ron%3BKase%2C+Kate&rft.aulast=Sepic&rft.aufirst=Ron&rft.date=2002-10-01&rft.volume=19&rft.issue=4&rft.spage=407&rft.isbn=&rft.btitle=&rft.title=Government+Information+Quarterly&rft.issn=0740624X&rft_id=info:doi/ L2 - http://aapgbull.geoscienceworld.org/ LA - English DB - GeoRef N1 - Conference title - AAPG Pacific Section and SPE Western Region conference; Energy frontiers; a 2002 perspective joint conference of geoscientists and petroleum engineers N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2002-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - CODEN - AABUD2 N1 - SubjectsTermNotLitGenreText - Alaska; allochthons; argillite; Avak Structure; Cape Simpson; clastic rocks; Colville Group; cores; Cretaceous; cuttings; Eagle River; impact features; Mesozoic; sandstone; Seabee Formation; sedimentary rocks; shale; United States; Upper Cretaceous ER - TY - JOUR T1 - A method for locating critical slip surfaces in slope stability analysis; discussion and reply AN - 51958444; 2003-053960 JF - Canadian Geotechnical Journal = Revue Canadienne de Geotechnique AU - Chugh, Ashok K AU - Zhu, Da-Yong Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 765 EP - 771 PB - National Research Council of Canada, Ottawa, ON VL - 39 IS - 3 SN - 0008-3674, 0008-3674 KW - computer programs KW - stress KW - slope stability KW - 30:Engineering geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51958444?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Canadian+Geotechnical+Journal+%3D+Revue+Canadienne+de+Geotechnique&rft.atitle=A+method+for+locating+critical+slip+surfaces+in+slope+stability+analysis%3B+discussion+and+reply&rft.au=Chugh%2C+Ashok+K%3BZhu%2C+Da-Yong&rft.aulast=Chugh&rft.aufirst=Ashok&rft.date=2002-06-01&rft.volume=39&rft.issue=3&rft.spage=765&rft.isbn=&rft.btitle=&rft.title=Canadian+Geotechnical+Journal+%3D+Revue+Canadienne+de+Geotechnique&rft.issn=00083674&rft_id=info:doi/ L2 - http://pubs.nrc-cnrc.gc.ca/rp-ps/journalDetail.jsp?jcode=cgj&lang=eng LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 2 N1 - PubXState - ON N1 - Document feature - illus. incl. 1 table N1 - SuppNotes - For reference to original see Zhu Da-Yong, Canadian Geotechnical Journal = Revue Canadienne de Geotechnique, Vol. 38, No. 2, p. 328-337, 2001 N1 - Last updated - 2012-06-07 N1 - CODEN - CGJOAH N1 - SubjectsTermNotLitGenreText - computer programs; slope stability; stress ER - TY - JOUR T1 - Flow dynamics and sedimentation in Spartina alterniflora and Phragmites australis marshes of the Chesapeake Bay AN - 51325288; 2003-017936 AB - The introduction of invasive species such as Phragmites australis in the Chesapeake Bay has been viewed to be deleterious to habitat quality. Little is known, however, on the extent to which the replacement of Spartina alterniflora by Phragmites affects hydrodynamics and sediment trapping on the surface of impacted marshes. This study examined sediment deposition, sediment mobility, and flow conditions in adjacent Phragmites australis and Spartina alternifora marshes in Prospect Bay, Maryland, USA in order to determine if differences in plant morphology affect surficial flow properties and particle dispersion patterns. Measures of fine-scale flow dynamics, total suspended sediment (TSS) concentration, and particulate deposition were obtained at various distances from open water across the marsh surface over four sequential tidal cycles in Fall 1999. The hydrodynamic data indicate that both the gross and fine-scale properties of tidal flows were similar in both types of vegetation and that flow conditions were conducive to particle deposition. TSS concentrations did not differ between canopy types and decreased over time in both systems. There was no difference in TSS reduction over distance between Spartina and Phragmites. The sediment trap data indicate that maximum deposition occurs closer to open water in both Spartina and Phragmites and that the organic content of deposited matter increased with distance into the marsh interior. This study provides the first in situ, high resolution, over-marsh flow data for marshes dominated by Phragmites. The data provided herein suggest that differences in vegetative cover do not significantly affect flow regime, sediment transport, and sediment deposition patterns in the marsh systems examined. JF - Wetlands (Wilmington, NC) AU - Leonard, Lynn A AU - Wren, P Ansley AU - Beavers, Rebecca L Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 415 EP - 424 PB - Society of Wetlands Scientists, Wilmington, NC VL - 22 IS - 2 SN - 0277-5212, 0277-5212 KW - United States KW - Monocotyledoneae KW - Spermatophyta KW - Chesapeake Bay KW - Phragmites KW - paludal sedimentation KW - estuarine sedimentation KW - ecology KW - Spartina KW - particulate materials KW - Maryland KW - Grasonville Maryland KW - Atlantic Coastal Plain KW - Spartina alterniflora KW - hydrology KW - Plantae KW - biodiversity KW - patterns KW - sediment transport KW - marshes KW - sedimentation KW - habitat KW - mires KW - wetlands KW - Queen Anne's County Maryland KW - Phragmites australis KW - Gramineae KW - Angiospermae KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51325288?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands+%28Wilmington%2C+NC%29&rft.atitle=Flow+dynamics+and+sedimentation+in+Spartina+alterniflora+and+Phragmites+australis+marshes+of+the+Chesapeake+Bay&rft.au=Leonard%2C+Lynn+A%3BWren%2C+P+Ansley%3BBeavers%2C+Rebecca+L&rft.aulast=Leonard&rft.aufirst=Lynn&rft.date=2002-06-01&rft.volume=22&rft.issue=2&rft.spage=415&rft.isbn=&rft.btitle=&rft.title=Wetlands+%28Wilmington%2C+NC%29&rft.issn=02775212&rft_id=info:doi/ LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 30 N1 - PubXState - NC N1 - Document feature - illus. incl. 2 tables, sketch map N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Angiospermae; Atlantic Coastal Plain; biodiversity; Chesapeake Bay; ecology; estuarine sedimentation; Gramineae; Grasonville Maryland; habitat; hydrology; marshes; Maryland; mires; Monocotyledoneae; paludal sedimentation; particulate materials; patterns; Phragmites; Phragmites australis; Plantae; Queen Anne's County Maryland; sediment transport; sedimentation; Spartina; Spartina alterniflora; Spermatophyta; United States; wetlands ER - TY - JOUR T1 - Implications of flood pulse restoration for Populus regeneration on the upper Missouri River AN - 20824512; 5410798 AB - We developed a mass balance flow model to reconstruct unregulated daily peak flows in the National Wild and Scenic reach of the Missouri River, Montana. Results indicated that although the observed frequency of large peak flows has not changed in the post-dam period, their magnitude has been reduced from 40 to 50% as a consequence of flow regulation. Reductions in the magnitude of these flows should reduce the expected frequency of large flood-pulses over a longer time-scale. Results of a two-dimensional hydraulic model indicated that limited cottonwood (Populus deltoides subsp. Monilifera) recruitment occurs at relatively small peak discharges, but to maximize establishment of cottonwoods in the Wild and Scenic reach, a threshold of 1850 m super(3)/s would be necessary at the Virgelle gauge. Floods of this magnitude or greater lead to establishment of cottonwood seedlings above the zone of frequent ice-drive disturbance. Restoring the frequency, magnitude, duration and timing of these flood pulses would benefit important natural resource values including riparian cottonwood forests and native fish species in the upper Missouri River basin. However, efforts to naturalize flow must be made in the context of a water management system that was authorized and constructed for the primary purposes of flood control, power generation and irrigation. Using the synthesized flow model and flood damage curves, we examined six scenarios for delivering flows greater than or equal to 1850 m super(3)/s to the Wild and Scenic reach. Whereas some scenarios appeared to be politically and economically infeasible, our analysis suggested that there is enough operational flexibility in the system to restore more natural flood pulses without greatly compromising other values. JF - River Research and Applications AU - Bovee, K D AU - Scott, M L AD - US Geological Survey, Midcontinent Ecological Science Center, 4512 McMurry Ave., Fort Collins, CO 80525-3400, USA, Ken_Bovee@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 287 EP - 298 VL - 18 IS - 3 SN - 1535-1459, 1535-1459 KW - USA, Montana, Missouri R. KW - Ecology Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Environmental Effects KW - Flood control KW - Riparian Vegetation KW - Water Management KW - Populus KW - Regulated Rivers KW - Trees KW - Hydraulic models KW - Floods and flooding KW - Freshwater KW - Models KW - Floods KW - Populus deltoides KW - Flood Peak KW - USA, Montana KW - Flood damage KW - Rivers KW - Case study KW - USA, Missouri R. KW - Case Studies KW - Irrigation KW - Recruitment KW - River discharge KW - Environmental impact KW - Vegetation KW - River basins KW - Cottonwood Trees KW - Model Studies KW - Water management KW - Natural resources KW - Natural Flow KW - Wilderness Areas KW - AQ 00001:Water Resources and Supplies KW - SW 4070:Ecological impact of water development KW - D 04040:Ecosystem and Ecology Studies KW - Q2 09171:Dynamics of lakes and rivers KW - M2 556.16:Runoff (556.16) KW - SW 2010:Control of water on the surface UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20824512?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=River+Research+and+Applications&rft.atitle=Implications+of+flood+pulse+restoration+for+Populus+regeneration+on+the+upper+Missouri+River&rft.au=Bovee%2C+K+D%3BScott%2C+M+L&rft.aulast=Bovee&rft.aufirst=K&rft.date=2002-06-01&rft.volume=18&rft.issue=3&rft.spage=287&rft.isbn=&rft.btitle=&rft.title=River+Research+and+Applications&rft.issn=15351459&rft_id=info:doi/10.1002%2Frra.672 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-11-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Flood control; Floods; Water management; Natural resources; Recruitment; Irrigation; Environmental impact; River discharge; River basins; Rivers; Models; Hydraulic models; Flood damage; Case study; Trees; Floods and flooding; Vegetation; Environmental Effects; Riparian Vegetation; Water Management; Regulated Rivers; Case Studies; Natural Flow; Flood Peak; Cottonwood Trees; Model Studies; Wilderness Areas; Populus; Populus deltoides; USA, Missouri R.; USA, Montana; Freshwater DO - http://dx.doi.org/10.1002/rra.672 ER - TY - JOUR T1 - Black Carbon from the Mississippi River: Quantities, Sources, and Potential Implications for the Global Carbon Cycle AN - 20583029; 5473031 AB - Black carbon (BC) may be a major component of riverine carbon exported to the ocean, but its flux from large rivers is unknown. Furthermore, the global distribution of BC between natural and anthropogenic sources remains uncertain. We have determined BC concentrations in suspended sediments of the Mississippi River, the 7th largest river in the world in terms of sediment and water discharge, during high flow and low flow in 1999. The 1999 annual flux of BC from the Mississippi River was 5 x 10 super(-4) petagrams (1 Pg = 10 super(15) g = 1 gigaton). We also applied a principal components analysis to particulate-phase high molecular weight polycyclic aromatic hydrocarbon isomer ratios in Mississippi River suspended sediments. In doing so, we determined that similar to 27% of the BC discharged from the Mississippi River in 1999 originated from fossil fuel combustion (coal and smelter-derived combustion), implicating fluvial BC as an important source of anthropogenic BC contamination into the ocean. Using our value for BC flux and the annual estimate for BC burial in ocean sediments, we calculate that, in 1999, the Mississippi River discharged similar to 5% of the BC buried annually in the ocean. These results have important implications, not only for the global carbon cycle but also for the fluvial discharge of particulate organic contaminants into the world's oceans. JF - Environmental Science & Technology AU - Mitra, S AU - Bianchi, T S AU - McKee, BA AU - Sutula, M AD - USGS, 345 Middlefield Road, Menlo Park, CA 94025, USA, smitra@usgs.gov Y1 - 2002/06/01/ PY - 2002 DA - 2002 Jun 01 SP - 2296 EP - 2302 VL - 36 IS - 11 SN - 0013-936X, 0013-936X KW - black carbon KW - combustion products KW - fossil fuels KW - Meteorological & Geoastrophysical Abstracts; Pollution Abstracts; Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Hydrodynamics KW - Environmental sciences KW - ASW, USA, Louisiana, Mississippi Delta KW - USA, Mississippi R. KW - Freshwater KW - Industrial wastes KW - Polycyclic aromatic hydrocarbons in river water KW - Aromatic hydrocarbons KW - Rivers KW - Marine KW - Principal component analysis KW - Sediment pollution KW - Sediment chemistry KW - Pollution detection KW - Fossil fuels KW - Outflow KW - River discharge KW - Carbon cycle KW - Brackish KW - World Ocean KW - ASW, USA, Gulf Coast KW - Chemical oceanography KW - Suspended particulate matter KW - Coastal waters KW - Sediments KW - Combustion KW - ASW, Mexico Gulf KW - North America, Mississippi R. KW - Marine pollution KW - Sediment load KW - Chemical pollutants KW - Q5 08503:Characteristics, behavior and fate KW - P 9000:ENVIRONMENTAL ACTION KW - M2 556.5:Surface Water Hydrology (556.5) KW - Q2 09187:Geochemistry of sediments KW - O 4060:Pollution - Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20583029?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Science+%26+Technology&rft.atitle=Black+Carbon+from+the+Mississippi+River%3A+Quantities%2C+Sources%2C+and+Potential+Implications+for+the+Global+Carbon+Cycle&rft.au=Mitra%2C+S%3BBianchi%2C+T+S%3BMcKee%2C+BA%3BSutula%2C+M&rft.aulast=Mitra&rft.aufirst=S&rft.date=2002-06-01&rft.volume=36&rft.issue=11&rft.spage=2296&rft.isbn=&rft.btitle=&rft.title=Environmental+Science+%26+Technology&rft.issn=0013936X&rft_id=info:doi/10.1021%2Fes015834b LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Sediment chemistry; Sediment pollution; Pollution detection; Carbon cycle; River discharge; Outflow; Suspended particulate matter; Chemical oceanography; Coastal waters; Industrial wastes; Marine pollution; Aromatic hydrocarbons; Sediment load; Chemical pollutants; Principal component analysis; Polycyclic aromatic hydrocarbons in river water; Environmental sciences; Rivers; Hydrodynamics; Fossil fuels; Sediments; Combustion; ASW, Mexico Gulf; North America, Mississippi R.; World Ocean; ASW, USA, Gulf Coast; USA, Mississippi R.; ASW, USA, Louisiana, Mississippi Delta; Marine; Brackish; Freshwater DO - http://dx.doi.org/10.1021/es015834b ER - TY - JOUR T1 - Optimizing well placement in a coastal aquifer: outer Cape Cod, Massachusetts AN - 20151860; 5441449 AB - An inverse-simulation approach is used to determine optimal strategies for developing public water-supply systems in a shallow, coastal aquifer on the outermost arm of the Cape Cod peninsula in Massachusetts. Typically a forward simulation (or "trial and error") approach is used to find best pumping strategies, but the chances of finding success with this tact diminish as the number of potential options grows large. Well locations and pumping rates are optimized with respect to: (1) providing sufficient water to areas of water-quality impairment, (2) minimizing impacts to nearby surface waters, (3) preventing saltwater contamination due to overpumping, and (4) minimizing financial cost of well development. Potential well sites and water-supply scenarios are separated into "politically-based" and "resource-based" categories to gain insight into the degree that pre-existing political boundaries hinder best management practices. The approach provides a promising tool in transboundary water-resources settings because it allows stakeholders to find solutions that best meet everyone's goals, as opposed to pursuing options that will create conflict, or are less than optimal. JF - Journal of the American Water Resources Association AU - Sobczak, R V AU - Cambareri, T C AD - National Park Service, Big Cypress National Preserve, 33100 Tamiami Trail East, HCR 61, Box 110, Ochopee, Florida 34141, USA, robert_sobczak@nps.gov Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 747 EP - 758 PB - Wiley-Blackwell, 111 River Street Hoboken NJ 07030-5774 United States VL - 38 IS - 3 SN - 1093-474X, 1093-474X KW - USA, Massachusetts, Cape Cod KW - ASFA Marine Biotechnology Abstracts; Pollution Abstracts; Sustainability Science Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Aqualine Abstracts; Water Resources Abstracts KW - Aquifers KW - water quality KW - Aquifer KW - Contamination KW - Politics KW - Surface water KW - Water Supply KW - Water resources KW - Siting KW - Decision Making KW - Coastal Aquifers KW - Water supplies KW - Wells (see also Boreholes) KW - Marine fish KW - best practices KW - Potential resources KW - Coastal fisheries KW - Pumping KW - Disputes KW - Decision theory KW - Groundwater Management KW - Political Aspects KW - stakeholders KW - conflicts KW - Marine KW - Site Selection KW - Simulation KW - Modelling (-general-) KW - Chemical oxygen demand KW - Water management KW - Boundaries KW - Groundwater pollution KW - Water wells KW - ANW, USA, Massachusetts, Cape Cod KW - Optimization KW - AQ 00001:Water Resources and Supplies KW - Q5 08503:Characteristics, behavior and fate KW - P 2000:FRESHWATER POLLUTION KW - M3 1010:Issues in Sustainable Development KW - SW 2040:Groundwater management KW - Q4 27790:Fish KW - SW 4020:Evaluation process UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20151860?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Water+Resources+Association&rft.atitle=Optimizing+well+placement+in+a+coastal+aquifer%3A+outer+Cape+Cod%2C+Massachusetts&rft.au=Sobczak%2C+R+V%3BCambareri%2C+T+C&rft.aulast=Sobczak&rft.aufirst=R&rft.date=2002-06-01&rft.volume=38&rft.issue=3&rft.spage=747&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Water+Resources+Association&rft.issn=1093474X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-10-01 N1 - Last updated - 2016-03-17 N1 - SubjectsTermNotLitGenreText - Marine fish; Aquifer; Potential resources; Contamination; Water resources; Coastal fisheries; Disputes; Pumping; Aquifers; Surface water; Boundaries; Chemical oxygen demand; conflicts; water quality; best practices; Politics; Simulation; Water wells; Groundwater pollution; stakeholders; Water management; Modelling (-general-); Siting; Decision theory; Water supplies; Optimization; Wells (see also Boreholes); Site Selection; Water Supply; Decision Making; Political Aspects; Coastal Aquifers; Groundwater Management; ANW, USA, Massachusetts, Cape Cod; Marine ER - TY - JOUR T1 - U-Pb ages of secondary silica at Yucca Mountain, Nevada: implications for the paleohydrology of the unsaturated zone AN - 19726265; 5409969 AB - Uranium, Th and Pb isotopes were analyzed in layers of opal and chalcedony from individual mm- to cm-thick calcite and silica coatings at Yucca Mountain, Nevada, USA, a site that is being evaluated for a potential high-level nuclear waste repository. These calcite and silica coatings on fractures and in lithophysal cavities in Miocene-age tuffs in the unsaturated zone (UZ) precipitated from descending water and record a long history of percolation through the UZ. Opal and chalcedony have high concentrations of U (10 to 780 ppm) and low concentrations of common Pb as indicated by large values of super(206)Pb/ super(204)Pb (up to 53,806), thus making them suitable for U-Pb age determinations. Interpretations of U-Pb isotope systems in opal samples at Yucca Mountain are complicated by the incorporation of excess super(234)U at the time of mineral formation, resulting in reverse discordance of U-Pb ages. However, the super(207)Pb/ super(235)U ages are much less affected by deviation from initial secular equilibrium and provide reliable ages of most silica deposits between 0.6 and 9.8 Ma. For chalcedony subsamples showing normal age discordance, these ages may represent minimum times of deposition. Typically, super(207)Pb/ super(235)U ages are consistent with the microstratigraphy in the mineral coating samples, such that the youngest ages are for subsamples from outer layers, intermediate ages are from inner layers, and oldest ages are from innermost layers. super(234)U and super(230)Th in most silica layers deeper in the coatings are in secular equilibrium with super(238)U, which is consistent with their old age and closed system behavior during the past similar to 0.5 Ma. The ages for subsamples of silica layers from different microstratigraphic positions in individual calcite and silica coating samples collected from lithophysal cavities in the welded part of the Topopah Spring Tuff yield slow long-term average growth rates of 1 to 5 mm/Ma. These data imply that the deeper parts of the UZ at Yucca Mountain maintained long-term hydrologic stability over the past 10 Ma. despite significant climate variations. U-Pb ages for subsamples of silica layers from different microstratigraphic positions in individual calcite and silica coating samples collected from fractures in the shallower part of the UZ (welded part of the overlying Tiva Canyon Tuff) indicate larger long-term average growth rates up to 23 mm/Ma and an absence of recently deposited materials (ages of outermost layers are 3-5 Ma.). These differences between the characteristics of the coatings for samples from the shallower and deeper parts of the UZ may indicate that the nonwelded tuffs (PTn), located between the welded parts of the Tiva Canyon and Topopah Spring Tuffs, play an important role in moderating UZ flow. JF - Applied Geochemistry AU - Neymark, LA AU - Amelin, Y AU - Paces, J B AU - Peterman, ZE AD - Pacific Western Technologies, Ltd., c/o U.S. Geological Survey, Denver Federal Center, Box 25046, MS 963, Denver, CO 80225, USA, lneymark@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 709 EP - 734 VL - 17 IS - 6 SN - 0883-2927, 0883-2927 KW - Paleohydrology KW - Tuffs KW - USA, Nevada, Yucca Mt. KW - Unsaturated zone KW - Pollution Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts KW - Radioactive waste disposal KW - Historical account KW - Aeration Zone KW - Isotopes KW - Age KW - Palaeo studies KW - Hydrogeology KW - USA, Nevada KW - Freshwater KW - Silica gel KW - Lead KW - Mountains KW - Uranium KW - silica KW - Waste disposal sites KW - Water springs KW - Welding KW - Hydrology KW - Radiometric dating KW - Growth rate KW - Geochemistry KW - Radioactive wastes KW - Calcite KW - Isotope Studies KW - Uranium Radioisotopes KW - canyons KW - Lead Radioisotopes KW - Site selection KW - Silica KW - Radioactive Waste Disposal KW - Underground Waste Disposal KW - Dating KW - Uranium isotopes KW - Geohydrology KW - Lead isotopes KW - Opal KW - Minerals KW - Coatings KW - SW 0880:Chemical processes KW - SW 3050:Ultimate disposal of wastes KW - P 8000:RADIATION KW - Q5 08502:Methods and instruments KW - Q2 09146:TSD distribution, water masses and circulation KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19726265?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=U-Pb+ages+of+secondary+silica+at+Yucca+Mountain%2C+Nevada%3A+implications+for+the+paleohydrology+of+the+unsaturated+zone&rft.au=Neymark%2C+LA%3BAmelin%2C+Y%3BPaces%2C+J+B%3BPeterman%2C+ZE&rft.aulast=Neymark&rft.aufirst=LA&rft.date=2002-06-01&rft.volume=17&rft.issue=6&rft.spage=709&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-02-01 N1 - SuppNotes - Special Issue: Geochemistry of Yucca Mountain, Nevada: A Potential Site for a High-Level Nuclear Waste Repository. N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Site selection; Silica; Palaeo studies; Uranium isotopes; Waste disposal sites; Geochemistry; Calcite; Radioactive wastes; Hydrology; Lead isotopes; Opal; Radiometric dating; Growth rate; Historical account; Age; Isotopes; canyons; Lead; Mountains; silica; Uranium; Welding; Water springs; Minerals; Coatings; Radioactive waste disposal; Dating; Hydrogeology; Silica gel; Paleohydrology; Aeration Zone; Radioactive Waste Disposal; Underground Waste Disposal; Geohydrology; Isotope Studies; Uranium Radioisotopes; Lead Radioisotopes; USA, Nevada; Freshwater ER - TY - JOUR T1 - Comparison of the Basin-scale Effect of Dredging Operations and Natural Estuarine Processes on Suspended Sediment Concentration AN - 19725946; 5443577 AB - Suspended sediment concentration (SSC) data from San Pablo Bay, California, were analyzed to compare the basin-scale effect of dredging and disposal of dredged material (dredging operations) and natural estuarine processes. The analysis used twelve 3-wk to 5-wk periods of mid-depth and near-bottom SSC data collected at Point San Pablo every 15 min from 1993-1998. Point San Pablo is within a tidal excursion of a dredged-material disposal site. The SSC data were compared to dredging volume, Julian day, and hydrodynamic and meteorological variables that could affect SSC. Kendall's tau , Spearman's rho , and weighted (by the fraction of valid data in each period) Spearman's rho sub(w) correlation coefficients of the variables indicated which variables were significantly correlated with SSC. Wind-wave resuspension had the greatest effect on SSC. Median water-surface elevation was the primary factor affecting mid-depth SSC. Greater depths inhibit wind-wave resuspension of bottom sediment and indicate greater influence of less turbid water from down estuary. Seasonal variability in the supply of erodible sediment is the primary factor affecting near-bottom SSC. Natural physical processes in San Pablo Bay are more areally extensive, of equal or longer duration, and as frequent as dredging operations (when occurring), and they affect SSC at the tidal time scale. Natural processes control SSC at Point San Pablo even when dredging operations are occurring. JF - Estuaries AU - Schoellhamer, D H AD - U.S. Geological Survey, 6000 J Street, Placer Hall, Sacramento, CA 95819, USA, dschoell@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 488 EP - 495 VL - 25 IS - 3 SN - 0160-8347, 0160-8347 KW - USA, California, San Pablo Bay KW - Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts; Aqualine Abstracts; Oceanic Abstracts KW - Dredge spoil KW - Coastal engineering KW - Hydrodynamics KW - Marginal basins KW - Sediment KW - Tidal effects KW - Resuspended sediments KW - Disposal sites KW - Sulfur dioxide KW - INE, USA, California KW - Dredging operations KW - Waste disposal sites KW - Water Depth KW - Correlation Analysis KW - Wind waves KW - Meteorology KW - Seasonal variations KW - Wind KW - Data Collections KW - Wave effects KW - Sediment pollution KW - Estuarine dynamics KW - Suspended Sediments KW - INE, USA, California, Point San Pablo KW - Resuspension KW - INE, USA, California, San Pablo Bay KW - Estuaries KW - Suspended particulate matter KW - Tides KW - Fate KW - Comparison Studies KW - Coastal oceanography KW - Dredging KW - Bay dynamics KW - Turbidity KW - O 6060:Coastal Zone Resources and Management KW - P 1000:MARINE POLLUTION KW - AQ 00002:Water Quality KW - SW 0890:Estuaries KW - Q5 08521:Mechanical and natural changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19725946?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Estuaries&rft.atitle=Comparison+of+the+Basin-scale+Effect+of+Dredging+Operations+and+Natural+Estuarine+Processes+on+Suspended+Sediment+Concentration&rft.au=Schoellhamer%2C+D+H&rft.aulast=Schoellhamer&rft.aufirst=D&rft.date=2002-06-01&rft.volume=25&rft.issue=3&rft.spage=488&rft.isbn=&rft.btitle=&rft.title=Estuaries&rft.issn=01608347&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Dredge spoil; Estuarine dynamics; Coastal engineering; Resuspension; Marginal basins; Suspended particulate matter; Tidal effects; Fate; Waste disposal sites; Coastal oceanography; Dredging; Wind waves; Bay dynamics; Turbidity; Wave effects; Disposal sites; Resuspended sediments; Sediment pollution; Sulfur dioxide; Hydrodynamics; Estuaries; Meteorology; Seasonal variations; Dredging operations; Sediment; Suspended Sediments; Comparison Studies; Correlation Analysis; Water Depth; Tides; Wind; Data Collections; INE, USA, California, Point San Pablo; INE, USA, California, San Pablo Bay; INE, USA, California ER - TY - JOUR T1 - A Model Using Phenotypic Characteristics to Detect Introgressive Hybridization in Wild Westslope Cutthroat Trout and Rainbow Trout AN - 18622235; 5531488 AB - Introgressive hybridization is a substantial threat to native populations of cutthroat trout Oncorhynchus clarki ssp. To assess the status of native cutthroat trout and protect existing pure (nonhybridized) populations, fisheries managers need to identify introgressive hybridization in wild populations. Genetic techniques are the most reliable methods for detecting introgression but are typically expensive and time-consuming. Phenotypic characteristics are generally easy to measure in the field and have been investigated for their value in identifying hybrids in several genera of fish. We developed a practical quantitative tool for detecting introgressive hybridization in westslope cutthroat trout O. c. lewisi by fitting a classification tree model to the phenotypic characteristics of known pure and hybrid individuals. We then tested it as a means of making site-level assessments of the level of introgression. The genotypes of individuals were determined using noncoding sequences of nuclear DNA. Four dominant phenotypic characteristics (basibranchial teeth, throat slashes, spot shape, and relative head length) were significantly (P < 0.05) related to the genetic identity of the individual fish. The overall cross-validation and out-of-sample error rates of the classification tree (13.7% and 12.5%, respectively) were much lower than the visual-assignment error rate (38.8%) and suggested a substantial improvement in the accuracy of identifying individual fish in the field. The classification and prediction error rates were higher for hybrid trout than for westslope cutthroat trout. Site-level predictions of introgression made with our tree model had an overall error rate of 31%, which was 49% lower than that of estimates based on visual field identification by experienced observers. Model error for the site-level predictions was highest when identifying populations of westslope cutthroat trout with less than 50% introgression and lowest when identifying populations with more than 50% introgression. Our results indicate that a phenotype-based model is easy to use in the field and improves the accuracy and consistency of visual identifications of westslope cutthroat trout and hybrids of westslope cutthroat trout and rainbow trout O. mykiss. Our model or a similar one can be used to estimate the genetic status of local (site) populations. JF - Transactions of the American Fisheries Society AU - Weigel, DE AU - Peterson, J T AU - Spruell, P AD - U.S. Bureau of Reclamation, Snake River Area Office, 1359 Hansen Avenue, Burley, Idaho 83318, USA Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 389 EP - 403 VL - 131 IS - 3 SN - 0002-8487, 0002-8487 KW - Cutthroat trout KW - Rainbow trout KW - Westslope cutthroat trout KW - classification tree model KW - in situ measurement KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA Aquaculture Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Nucleotide sequence KW - Oncorhynchus mykiss KW - Phenotypic variations KW - Genotypes KW - Freshwater KW - Freshwater fish KW - Hybridization KW - Salmon fisheries KW - USA, Idaho KW - Fishery management KW - DNA KW - Oncorhynchus clarki KW - Natural populations KW - Oncorhynchus clarki lewisi KW - USA, Montana KW - Q5 08523:Conservation, wildlife management and recreation KW - Q1 08382:Ecological techniques and apparatus KW - Q3 08582:Fish culture UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18622235?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Transactions+of+the+American+Fisheries+Society&rft.atitle=A+Model+Using+Phenotypic+Characteristics+to+Detect+Introgressive+Hybridization+in+Wild+Westslope+Cutthroat+Trout+and+Rainbow+Trout&rft.au=Weigel%2C+DE%3BPeterson%2C+J+T%3BSpruell%2C+P&rft.aulast=Weigel&rft.aufirst=DE&rft.date=2002-06-01&rft.volume=131&rft.issue=3&rft.spage=389&rft.isbn=&rft.btitle=&rft.title=Transactions+of+the+American+Fisheries+Society&rft.issn=00028487&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Salmon fisheries; Fishery management; Nucleotide sequence; DNA; Natural populations; Phenotypic variations; Genotypes; Freshwater fish; Hybridization; Oncorhynchus clarki; Oncorhynchus mykiss; Oncorhynchus clarki lewisi; USA, Idaho; USA, Montana; Freshwater ER - TY - JOUR T1 - Spatial variability in water-balance model performance in the conterminous United States AN - 18570783; 5441456 AB - A monthly water-balance (WB) model was tested in 44 river basins from diverse physiographic and climatic regions across the conterminous United States (U.S.). The WB model includes the concepts of climatic water supply and climatic water demand, seasonality in climatic water supply and demand, and soil-moisture storage. Exhaustive search techniques were employed to determine the optimal set of precipitation and temperature stations, and the optimal set of WB model parameters to use for each basin. It was found that the WB model worked best for basins with: (1) a mean elevation less than 450 meters or greater than 2000 meters, and/or (2) monthly runoff that is greater than 5 millimeters (mm) more than 80 percent of the time. In a separate analysis, a multiple linear regression (MLR) was computed using the adjusted R-square values obtained by comparing measured and estimated monthly runoff of the original 44 river basins as the dependent variable, and combinations of various independent variables [streamflow gauge latitude, longitude, and elevation; basin area, the long-term mean and standard deviation of annual precipitation; temperature and runoff; and low-flow statistics (i.e., the percentage of months with monthly runoff that is less than 5 mm)]. Results from the MLR study showed that the reliability of a WB model for application in a specific region can be estimated from mean basin elevation and the percentage of months with gauged runoff less than 5 mm. The MLR equations were subsequently used to estimate adjusted R-square values for 1,646 gauging stations across the conterminous U.S. Results of this study indicate that WB models can be used reliably to estimate monthly runoff in the eastern U.S., mountainous areas of the western U.S., and the Pacific Northwest. Applications of monthly WB models in the central U.S. can lead to uncertain estimates of runoff. JF - Journal of the American Water Resources Association AU - Hay, LE AU - McCabe, G J AD - U.S. Geological Survey, Box 25046, MS 412, Denver Federal Center, Denver, Colorado 80225, USA, lhay@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 847 EP - 860 VL - 38 IS - 3 SN - 1093-474X, 1093-474X KW - USA KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Aqualine Abstracts; Water Resources Abstracts KW - Freshwater KW - AQ 00001:Water Resources and Supplies KW - SW 0810:General KW - Q2 02171:Dynamics of lakes and rivers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18570783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Water+Resources+Association&rft.atitle=Spatial+variability+in+water-balance+model+performance+in+the+conterminous+United+States&rft.au=Hay%2C+LE%3BMcCabe%2C+G+J&rft.aulast=Hay&rft.aufirst=LE&rft.date=2002-06-01&rft.volume=38&rft.issue=3&rft.spage=847&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Water+Resources+Association&rft.issn=1093474X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Availability of food resources, distribution of invasive species, and conservation of a Hawaiian bird along a gradient of elevation AN - 18461891; 5435479 AB - We evaluated how an elevation gradient affects: (1) the availability of food required by a specialist seed-eater, Loxioides bailleui Oustalet (Drepanidinae), or palila, and hence the distribution of this endangered Hawaiian bird, and (2) the distribution of alien threats to Loxioides populations, their primary foods, and their dry-forest habitat, and hence strategies for their conservation. We worked throughout the subalpine forest that encircles Mauna Kea Volcano, Hawai'i Island, but we focused our studies mainly on the western slope between 2000 and 3000 m elevation, where the gradient of elevation was greatest and palila were most abundant. We determined phenology and productivity patterns of the endemic dry-forest tree species, Sophora chrysophylla (Salisb.) Seem. (Fabaceae), or mamane, which provides Loxioides with most of their food, and another common endemic tree, Myoporum sandwicense A. Gray (Myoporaceae), or naio, which provides some resources, along a 786-m elevation gradient at monthly intervals for 10 years (Sophora only). We also determined the availability each month of moth larvae (Lepidoptera) for that were important in the diet of nestling and adult palila. In addition, we documented the incidence of parasitism on moth larvae by several wasp (Hymenoptera) and fly (Diptera) species, and we determined the distribution of predatory wasps and ants (Hymenoptera), which potentially threaten insect prey of birds. Percentage cover of alien grass species that pose fire threats in palila habitat and other weeds were assessed during one survey. Small mammal abundance and distribution were determined by trapping during three (rodent) or five (carnivore) surveys. Sophora flower and seed (pod) availability varied predictably along the elevation gradient, with about 4 months separating peaks in reproduction at high and low elevations. This, together with highly variable production of flowers and pods within elevation strata, resulted in Sophora resources being available to Loxioides throughout the year on the western slope of Mauna Kea. Sophora produced flowers and pods more seasonally where gradients of elevation were short; thus, resources were available less consistently. In contrast, Myoporum produced flowers and fruits with little variation with respect to season or elevation. The availability of important insect prey of Loxioides was also related to elevation, in part because threats to Lepidoptera larvae from parasitic wasps were generally less at higher elevations. Threats to insect prey from predatory ants was also less at higher elevations but the abundance of predatory wasps was not related to elevation. Several weeds that pose the most serious threats to Loxioides habitat were more abundant at mid and low elevations, and alien grass cover was somewhat greater at mid elevation, thereby increasing fire risks in the centre of Loxioides habitat. Predatory mammals, in particular Felis catus Linnaeus, were common throughout the subalpine forest of Mauna Kea. However, Rattus rattus Linnaeus was rare, especially at higher elevations, whereas Mus musculus Linnaeus was more abundant at lower elevations. Loxioides are concentrated in habitat that is distributed along a substantial gradient of elevation at least in part because food is available throughout the year and threats to food resources are less concentrated. To recover Loxioides elsewhere in its former range, habitats must be restored and alien threats reduced along extensive elevation gradients. Conservation along environmental gradients will likely benefit other Hawaiian birds that track the availability of food across landscapes or that have been stranded in the higher portions of their original ranges because of the greater impacts of alien diseases, predators, food competitors, and habitat stressors at lower elevations. JF - Journal of Biogeography AU - Banko, P C AU - Oboyski, P T AU - Slotterback, J W AU - Dougill AU - Goltz, D M AU - Johnson, L AU - Laut, ME AU - Murray, T C AD - USGS-Pacific Island Ecosystems Research Center, Kilauea Field Station, PO Box 44, Hawai'i National Park, HI 96718, USA, paul_banko@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 789 EP - 808 VL - 29 IS - 5-6 SN - 0305-0270, 0305-0270 KW - Honeycreeper KW - Palila KW - Ecology Abstracts KW - D 04671:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18461891?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Biogeography&rft.atitle=Availability+of+food+resources%2C+distribution+of+invasive+species%2C+and+conservation+of+a+Hawaiian+bird+along+a+gradient+of+elevation&rft.au=Banko%2C+P+C%3BOboyski%2C+P+T%3BSlotterback%2C+J+W%3BDougill%3BGoltz%2C+D+M%3BJohnson%2C+L%3BLaut%2C+ME%3BMurray%2C+T+C&rft.aulast=Banko&rft.aufirst=P&rft.date=2002-06-01&rft.volume=29&rft.issue=5-6&rft.spage=789&rft.isbn=&rft.btitle=&rft.title=Journal+of+Biogeography&rft.issn=03050270&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Excess density compensation of island herpetofaunal assemblages AN - 18461851; 5435466 AB - Some species reach extraordinary densities on islands. Island assemblages have fewer species, however, and it is possible that island species differ from their mainland counterparts in average mass. Island assemblages could be partitioned differently (fewer species or smaller individuals) from mainland sites without differing in aggregate biomass (density compensation). Our objective was to determine the generality of excess density compensation in island herpetofaunal assemblages. Our bounded removal plot data were obtained from Pacific Island sites (Guam, Saipan and Rota), the West Indies (British Virgin Islands), and the Indian Ocean (Ile aux Aigrettes off Mauritius). The literature values were taken from several locales. Other island locations included Barro Colorado Island, Bonaire, Borneo, Philippine Islands, Seychelle Islands, Barrow Island (Australia), North Brother Island (New Zealand), Dominica and Puerto Rico. Mainland sites included Costa Rica, Ivory Coast, Cameroon, Australia, Thailand, Peru, Brazil, Panama and the USA. We added our thirty-nine bounded total removal plots from sixteen island habitats to fifteen literature records to obtain seventy-five venues with estimable density and biomass of arboreal or terrestrial herpetofaunal assemblages. These biomass estimates were evaluated geographically and in relation to sampling method, insularity, latitude, disturbance regime, seasonality, community richness, vegetative structure and climate. Direct data on trophic interactions (food availability, parasitism and predation pressure) were generally unavailable. Sampling problems were frequent for arboreal, cryptic and evasive species. We found strong evidence that herpetofaunal assemblages on small islands (mostly lizards) exhibit a much greater aggregate density of biomass (kg ha super(-1)) than those of larger islands or mainland assemblages (small islands show excess density compensation). High aggregate biomass density was more strongly associated with the degree of species impoverishment on islands than it was on island area or insularity per se. High aggregate biomass density was not strongly associated with latitude, precipitation, canopy height or a variety of other physical characteristics of the study sites. The association between high aggregate biomass density and species-poor islands is consistent with the effects of a reduced suite of predators on depauperate islands, but other features may also contribute to excess density compensation. JF - Journal of Biogeography AU - Rodda, G H AU - Dean-Bradley, K AD - USGS Midcontinent Ecological Science Center, 4512 McMurry Avenue, Fort Collins, CO 80525, USA, gordon_rodda@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 623 EP - 632 VL - 29 IS - 5-6 SN - 0305-0270, 0305-0270 KW - Amphibians KW - Reptiles KW - Ecology Abstracts KW - D 04670:Reptiles KW - D 04669:Amphibians UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18461851?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Biogeography&rft.atitle=Excess+density+compensation+of+island+herpetofaunal+assemblages&rft.au=Rodda%2C+G+H%3BDean-Bradley%2C+K&rft.aulast=Rodda&rft.aufirst=G&rft.date=2002-06-01&rft.volume=29&rft.issue=5-6&rft.spage=623&rft.isbn=&rft.btitle=&rft.title=Journal+of+Biogeography&rft.issn=03050270&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Hierarchical modeling of population stability and species group attributes from survey data AN - 18435750; 5418029 AB - Many ecological studies require analysis of collections of estimates. For example, population change is routinely estimated for many species from surveys such as the North American Breeding Bird Survey (BBS), and the species are grouped and used in comparative analyses. We developed a hierarchical model for estimation of group attributes from a collection of estimates of population trend. The model uses information from predefined groups of species to provide a context and to supplement data for individual species; summaries of group attributes are improved by statistical methods that simultaneously analyze collections of trend estimates. The model is Bayesian; trends are treated as random variables rather than fixed parameters. We use Markov Chain Monte Carlo (MCMC) methods to fit the model. Standard assessments of population stability cannot distinguish magnitude of trend and statistical significance of trend estimates, but the hierarchical model allows us to legitimately describe the probability that a trend is within given bounds. Thus we define population stability in terms of the probability that the magnitude of population change for a species is less than or equal to a predefined threshold. We applied the model to estimates of trend for 399 species from the BBS to estimate the proportion of species with increasing populations and to identify species with unstable populations. Analyses are presented for the collection of all species and for 12 species groups commonly used in BBS summaries. Overall, we estimated that 49% of species in the BBS have positive trends and 33 species have unstable populations. However, the proportion of species with increasing trends differs among habitat groups, with grassland birds having only 19% of species with positive trend estimates and wetland birds having 68% of species with positive trend estimates. JF - Ecology AU - Sauer, J R AU - Link, WA AD - USGS Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, Maryland 20708, USA Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 1743 EP - 1751 PB - Ecological Society of America VL - 83 IS - 6 SN - 0012-9658, 0012-9658 KW - Birds KW - Population stability KW - breeding bird survey KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - D 04671:Birds KW - D 04003:Modeling, mathematics, computer applications KW - Q1 01442:Population dynamics KW - Q1 01382:Ecological techniques and apparatus UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18435750?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecology&rft.atitle=Hierarchical+modeling+of+population+stability+and+species+group+attributes+from+survey+data&rft.au=Sauer%2C+J+R%3BLink%2C+WA&rft.aulast=Sauer&rft.aufirst=J&rft.date=2002-06-01&rft.volume=83&rft.issue=6&rft.spage=1743&rft.isbn=&rft.btitle=&rft.title=Ecology&rft.issn=00129658&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Global Modeling of Land Water and Energy Balances. Part III: Interannual Variability AN - 18423359; 5401212 AB - The Land Dynamics (LaD) model is tested by comparison with observations of interannual variations in discharge from 44 large river basins for which relatively accurate time series of monthly precipitation (a primary model input) have recently been computed. When results are pooled across all basins, the model explains 67% of the interannual variance of annual runoff ratio anomalies (i.e., anomalies of annual discharge volume, normalized by long-term mean precipitation volume). The new estimates of basin precipitation appear to offer an improvement over those from a state-of-the-art analysis of global precipitation (the Climate Prediction Center Merged Analysis of Precipitation, CMAP), judging from comparisons of parallel model runs and of analyses of precipitation-discharge correlations. When the new precipitation estimates are used, the performance of the LaD model is comparable to, but not significantly better than, that of a simple, semiempirical water-balance relation that uses only annual totals of surface net radiation and precipitation. This implies that the LaD simulations of interannual runoff variability do not benefit substantially from information on geographical variability of land parameters or seasonal structure of interannual variability of precipitation. The aforementioned analyses necessitated the development of a method for downscaling of long-term monthly precipitation data to the relatively short timescales necessary for running the model. The method merges the long-term data with a reference dataset of 1-yr duration, having high temporal resolution. The success of the method, for the model and data considered here, was demonstrated in a series of model-model comparisons and in the comparisons of modeled and observed interannual variations of basin discharge. JF - Journal of Hydrometeorology AU - Shmakin, AB AU - Milly, PCD AU - Dunne, KA AD - Water Resources Division, U.S. Geological Survey, NOAA/Geophysical Fluid Dynamics Laboratory, P.O. Box 308, Princeton, NJ 08542, cmilly@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 311 EP - 321 PB - American Meteorological Society VL - 3 IS - 3 SN - 1525-755X, 1525-755X KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - SW 0810:General KW - M2 551.579:Hydrometeorology (551.579) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18423359?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrometeorology&rft.atitle=Global+Modeling+of+Land+Water+and+Energy+Balances.+Part+III%3A+Interannual+Variability&rft.au=Shmakin%2C+AB%3BMilly%2C+PCD%3BDunne%2C+KA&rft.aulast=Shmakin&rft.aufirst=AB&rft.date=2002-06-01&rft.volume=3&rft.issue=3&rft.spage=311&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1043%2F1525-7541%282002%29003%280311%3AGMOLWA%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/1525-7541(2002)003(0311:GMOLWA)2.0.CO;2 ER - TY - JOUR T1 - Response of benthic algae to environmental gradients in an agriculturally dominated landscape AN - 18422810; 5408554 AB - Benthic algal communities were assessed in an agriculturally dominated landscape in the Central Columbia Plateau, Washington, to determine which environmental variables best explained species distributions, and whether algae species optima models were useful in predicting specific water-quality parameters. Land uses in the study area included forest, range, urban, and agriculture. Most of the streams in this region can be characterized as open-channel systems influenced by intensive dryland (nonirrigated) and irrigated agriculture. Algal communities in forested streams were dominated by blue-green algae, with communities in urban and range streams dominated by diatoms. The predominance of either blue-greens or diatoms in agricultural streams varied greatly depending on the specific site. Canonical correspondence analysis (CCA) indicated a strong gradient effect of several key environmental variables on benthic algal community composition. Conductivity and % agriculture were the dominant explanatory variables when all sites (n = 24) were included in the CCA; water velocity replaced conductivity when the CCA included only agricultural and urban sites. Other significant explanatory variables included dissolved inorganic nitrogen (DIN), orthophosphate (OP), discharge, and precipitation. Regression and calibration models accurately predicted conductivity based on benthic algal communities, with OP having slightly lower predictability. The model for DIN was poor, and therefore may be less useful in this system. Thirty-four algal taxa were identified as potential indicators of conductivity and nutrient conditions, with most indicators being diatoms except for the blue-greens Anabaena sp. and Lyngbya sp. JF - Journal of the North American Benthological Society AU - Munn, MD AU - Black, R W AU - Gruber, S J AD - US Geological Survey, Suite 600, 1201 Pacific Ave., Tacoma, WA 98402, USA, mdmunn@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 221 EP - 237 VL - 21 IS - 2 SN - 0887-3593, 0887-3593 KW - Canonical correspondence analysis KW - USA, Washington, Central Columbia Plateau KW - conductivity KW - dissolved inorganic nitrogen KW - Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Freshwater KW - SW 2060:Effects on water of human nonwater activities KW - Q1 01221:General KW - D 04310:Freshwater KW - Q1 01422:Environmental effects KW - Q5 01504:Effects on organisms KW - Q1 01462:Benthos UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18422810?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+North+American+Benthological+Society&rft.atitle=Response+of+benthic+algae+to+environmental+gradients+in+an+agriculturally+dominated+landscape&rft.au=Munn%2C+MD%3BBlack%2C+R+W%3BGruber%2C+S+J&rft.aulast=Munn&rft.aufirst=MD&rft.date=2002-06-01&rft.volume=21&rft.issue=2&rft.spage=221&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+North+American+Benthological+Society&rft.issn=08873593&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Global Modeling of Land Water and Energy Balances. Part I: The Land Dynamics (LaD) Model AN - 18422100; 5401210 AB - A simple model of large-scale land (continental) water and energy balances is presented. The model is an extension of an earlier scheme with a record of successful application in climate modeling. The most important changes from the original model include 1) introduction of non-water-stressed stomatal control of transpiration, in order to correct a tendency toward excessive evaporation; 2) conversion from globally constant parameters (with the exception of vegetation-dependent snow-free surface albedo) to more complete vegetation and soil dependence of all parameters, in order to provide more realistic representation of geographic variations in water and energy balances and to enable model-based investigations of land-cover change; 3) introduction of soil sensible heat storage and transport, in order to move toward realistic diurnal-cycle modeling; 4) a groundwater (saturated-zone) storage reservoir, in order to provide more realistic temporal variability of runoff; and 5) a rudimentary runoff-routing scheme for delivery of runoff to the ocean, in order to provide realistic freshwater forcing of the ocean general circulation model component of a global climate model. The new model is tested with forcing from the International Satellite Land Surface Climatology Project Initiative I global dataset and a recently produced observation-based water-balance dataset for major river basins of the world. Model performance is evaluated by comparing computed and observed runoff ratios from many major river basins of the world. Special attention is given to distinguishing between two components of the apparent runoff ratio error: the part due to intrinsic model error and the part due to errors in the assumed precipitation forcing. The pattern of discrepancies between modeled and observed runoff ratios is consistent with results from a companion study of precipitation estimation errors. The new model is tuned by adjustment of a globally constant scale factor for non-water-stressed stomatal resistance. After tuning, significant overestimation of runoff is found in environments where an overall arid climate includes a brief but intense wet season. It is shown that this error may be explained by the neglect of upward soil water diffusion from below the root zone during the dry season. With the exception of such basins, and in the absence of precipitation errors, it is estimated that annual runoff ratios simulated by the model would have a root-mean-square error of about 0.05. The new model matches observations better than its predecessor, which has a negative runoff bias and greater scatter. JF - Journal of Hydrometeorology AU - Milly, PCD AU - Shmakin, AB AD - Water Resources Division, U.S. Geological Survey, NOAA/Geophysical Fluid Dynamics Laboratory, P.O. Box 308, Princeton, NJ 08542, cmilly@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 283 EP - 299 PB - American Meteorological Society VL - 3 IS - 3 SN - 1525-755X, 1525-755X KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - M2 551.583:Variations (551.583) KW - SW 0810:General KW - M2 551.579:Hydrometeorology (551.579) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18422100?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrometeorology&rft.atitle=Global+Modeling+of+Land+Water+and+Energy+Balances.+Part+I%3A+The+Land+Dynamics+%28LaD%29+Model&rft.au=Milly%2C+PCD%3BShmakin%2C+AB&rft.aulast=Milly&rft.aufirst=PCD&rft.date=2002-06-01&rft.volume=3&rft.issue=3&rft.spage=283&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1043%2F1525-7541%282002%29003%280283%3AGMOLWA%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/1525-7541(2002)003(0283:GMOLWA)2.0.CO;2 ER - TY - JOUR T1 - Substrate heterogeneity and number of plant species in Everglades savannas (Florida, USA) AN - 18418467; 5405429 AB - Environmental heterogeneity, especially that related to topography, has been proposed to influence numbers of plant species in different sized areas. Despite little variation in elevation, large numbers of vascular plant species occur in some habitats. This study explored possible relationships between number of plant species and substrate heterogeneity in two species-rich habitats, subtropical pine savannas and short-hydroperiod prairies, in the Long Pine Key region of Everglades National Park (Florida, U.S.A.). We examined relationships between numbers of vascular plant species and topographic heterogeneity by measuring numbers of species and elevations in different sizes of nested plots that spanned five orders of magnitude (0.1 m super(2) to 1000 m super(2) ) and that were located along two transects extending from pine savannas into short-hydroperiod prairies in different areas of Long Pine Key. We also classified substrates and soil depths in 1 m 2 sized submodules within the nested plots. Pine savannas occurred at higher elevations than adjacent short-hydroperiod prairies. Although differences occurred in substrate types and distribution within 1 m 2 plots, numbers of species were not associated with these differences. Variances in elevations were similar in the smallest plots, but increased with area more rapidly in pine savannas than in short-hydroperiod prairies. Plot size explained about 85% of the variation in species numbers, which increased from 20-40 per 1 m 2 to 80-120 per 1000 m super(2) . An interaction between habitat and scale explained 5% of the variation; more species occurred in short-hydroperiod prairies than pine savannas at scales 10 m super(2). The number of species in pine savannas at scales of 1 m super(2)and 10 m super(2)was positively associated with variation in elevations; no significant relationships were obtained in short-hydroperiod prairies, which lack the fine-scale topographic variation of pine savannas. Our data indicate that substrate heterogeneity, measured as variation in elevations, is not likely to be involved in the co-occurrence of many species within small areas of these savannas, but may influence numbers of species at larger scales of observation, especially in pine savannas. Why many plant species occur within very small areas in these savannas remains unanswered. JF - Plant Ecology AU - Schmitz, M AU - Platt, W AU - DeCoster, J AD - National Park Service, Midwest Regional Office, 1709 Jackson St., Omaha, NE 68102, USA Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 137 EP - 148 PB - Kluwer Academic Publishers VL - 160 IS - 2 SN - 1385-0237, 1385-0237 KW - Everglades KW - Ecology Abstracts KW - D 04116:Tropical savannahs UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18418467?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Plant+Ecology&rft.atitle=Substrate+heterogeneity+and+number+of+plant+species+in+Everglades+savannas+%28Florida%2C+USA%29&rft.au=Schmitz%2C+M%3BPlatt%2C+W%3BDeCoster%2C+J&rft.aulast=Schmitz&rft.aufirst=M&rft.date=2002-06-01&rft.volume=160&rft.issue=2&rft.spage=137&rft.isbn=&rft.btitle=&rft.title=Plant+Ecology&rft.issn=13850237&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Pathways Of Nutrient Loading And Impacts On Plant Diversity In A New York Peatland AN - 18414523; 5401028 AB - Nutrient loading is a subtle, yet serious threat to the preservation of high diversity wetlands such as peatlands. Pathways of nutrient loading and impacts on plant diversity in a small peatland in New York State, USA were determined by collecting and analyzing a suite of hydrogeological, hydro-chemical, soil, and vegetation data. Piezometer clusters within an intensive network constituted hydro-chemical sampling points and focal points for randomly selected vegetation quadrats and soil-coring locations. Hydrogeological data and nutrient analyses showed that P and K loading occurred chiefly by means of overland flow from an adjacent farm field, whereas N loading occurred predominantly through ground-water flow from the farm field. Redundancy analysis and polynomial regression showed that nutrients, particularly total P in peat, total K in peat, extractable NH4-N, and NO3-N flux in ground water, were strongly negatively correlated with plant diversity measures at the site. No other environmental variables except vegetation measures associated with eutrophication demonstrated such a strong relationship with plant diversity. Nitrate loading over 4 mg m-2 day-1 was associated with low plant diversity, and Ca fluxes between 80 and 130 mg m-2 day-1 were associated with high plant diversity. Areas in the site with particularly low vascular plant and bryophyte species richness and Shannon-Wiener diversity (H') occurred adjacent to the farm field and near a hillside spring. High H' and species richness of vascular plants and bryophytes occurred in areas that were further removed from agriculture, contained no highly dominant vegetation, and were situated directly along the ground-water flow paths of springs. These areas were characterized by relatively constant water levels and consistent, yet moderate fluxes of base cations and nutrients. Overall, this study demonstrates that knowledge of site hydrogeology is crucial for determining potential pathways of nutrient loading and for developing relationships between nutrient inflows and wetland plant diversity. JF - Wetlands AU - Drexler, J Z AU - Bedford, B L AD - Department of Natural Resources Cornell University, Ithaca, New York, USA 14853, 95619-6129jdrexler@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 263 EP - 281 PB - The Society of Wetland Scientists VL - 22 IS - 2 SN - 0277-5212, 0277-5212 KW - USA, New York KW - Water Resources Abstracts; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality KW - Freshwater KW - SW 2060:Effects on water of human nonwater activities KW - Q1 01463:Habitat community studies KW - D 04200:Wetlands KW - Q5 01504:Effects on organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18414523?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands&rft.atitle=Pathways+Of+Nutrient+Loading+And+Impacts+On+Plant+Diversity+In+A+New+York+Peatland&rft.au=Drexler%2C+J+Z%3BBedford%2C+B+L&rft.aulast=Drexler&rft.aufirst=J&rft.date=2002-06-01&rft.volume=22&rft.issue=2&rft.spage=263&rft.isbn=&rft.btitle=&rft.title=Wetlands&rft.issn=02775212&rft_id=info:doi/10.1043%2F0277-5212%282002%29022%280263%3APONLAI%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0277-5212(2002)022(0263:PONLAI)2.0.CO;2 ER - TY - JOUR T1 - Influence Of An Extreme High Water Event On Survival, Reproduction, And Distribution Of Snail Kites In Florida, USA AN - 18413577; 5401036 AB - Hydrology frequently has been reported as the environmental variable having the greatest influence on Florida snail kite (Rostrhamus sociabilis) populations. Although drought has received the most attention, high-water conditions also have been reported to affect kites. Years of high water generally have been reported to be favorable for nesting, although prolonged high water may be detrimental to sustaining suitable habitat. During 1994 and 1995, southern Florida experienced an extreme high water event. This event enabled us to compare survival, nesting success, number of young per successful nest, and spatial distribution of nesting before, during, and after the event. We found no evidence of an effect (either negative or positive) on survival of adult kites. In contrast, juvenile kites experienced the highest survival during the event, although our data suggest greater annual variability than can be explained by the event alone. We found no evidence of an effect of the high water event on nest success or number of young per successful nest. Nest success was highest during the event in the southern portion of the range but was quite similar to other years, both before and after the event. Our data do indicate a substantial shift in the spatial distribution of nesting birds. During the event, nesting activity shifted to higher elevations (i.e., shallower water) in the major nesting areas of the Everglades region. Nesting also occurred in Big Cypress National Preserve during the event, which is typically too dry to support nesting kites. Thus, our data indicate a potential short-term benefit of increased juvenile survival and an expansion of nesting habitat. However, the deterioration of habitat quality from prolonged high water precludes any recommendation for such conditions to be maintained for extended periods. JF - Wetlands AU - Bennetts, R E AU - Kitchens, WM AU - Dreitz, V J AD - Department of Wildlife Ecology and Conservation, Florida Cooperative Fish and Wildlife Research Unit, University of Florida, P.O. Box 110450 Gainesville, Florida, USA 32611-0450, rbennetts@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 366 EP - 373 PB - The Society of Wetland Scientists VL - 22 IS - 2 SN - 0277-5212, 0277-5212 KW - Snail kite KW - USA, Florida KW - snail kite KW - Water Resources Abstracts; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Freshwater KW - Q1 01364:Reproduction and development KW - D 04671:Birds KW - Q1 01422:Environmental effects KW - SW 0810:General KW - Q1 01442:Population dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18413577?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands&rft.atitle=Influence+Of+An+Extreme+High+Water+Event+On+Survival%2C+Reproduction%2C+And+Distribution+Of+Snail+Kites+In+Florida%2C+USA&rft.au=Bennetts%2C+R+E%3BKitchens%2C+WM%3BDreitz%2C+V+J&rft.aulast=Bennetts&rft.aufirst=R&rft.date=2002-06-01&rft.volume=22&rft.issue=2&rft.spage=366&rft.isbn=&rft.btitle=&rft.title=Wetlands&rft.issn=02775212&rft_id=info:doi/10.1043%2F0277-5212%282002%29022%280366%3AIOAEHW%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0277-5212(2002)022(0366:IOAEHW)2.0.CO;2 ER - TY - JOUR T1 - Effects of nutrient enrichment on channel catfish growth and consumption in Mount Storm Lake, West Virginia AN - 18409660; 5399868 AB - With the objective of augmenting fish production in Mount Storm Lake, Virginia Electric and Power Company initiated a programme of phosphorus addition to increase primary production, and ultimately, channel catfish (Ictaturus punctatus ) growth in the 486 ha cooling reservoir. We simulated channel catfish growth dynamics using two bioenergetics modelling scenarios: (i) effects of average reservoir temperature on growth, conversion efficiency and consumption; and (ii) effects of reservoir enrichment on growth, which is simulated by increasing feeding rates. During 1991-1993, fish were sampled monthly, but sampling was increased to every 2 weeks during the peak growing season (June-September). Most of the channel catfish collected were aged 0 year and aged 1 year with rapid annual growth rates ranging from 9.0 to 13.7 J/g. We found many age 1 250-300 mm catfish, but few beyond this size. Conversion efficiency (joules gained/joules consumed) was low at approximately 18-19%. High algae consumption (40%) was evident, but consumption of zooplankton and Asiatic clam (Corbicula sp.) increased over the study. Simulated increased feeding rates showed that channel catfish were food limited in summer and fall (July-December). Weight gains with 5 and 10% feeding increases were 6-13% and 18-38%, respectively, from the baseline. Catfish of all sizes should benefit from phosphorus additions. JF - Lakes & Reservoirs: Research and Management AU - Blanc, T J AU - Margraf, F J AD - United States Geological Survey, West Virginia Cooperative Fish and Wildlife Research Unit, West Virginia University, PO Box 6125, Percival Hal, Morgantown, WV 26506, USA, ffjfm1@uaf.edu Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 109 EP - 123 PB - Blackwell Science Ltd VL - 7 IS - 2 SN - 1320-5331, 1320-5331 KW - Channel catfish KW - Graceful catfish KW - USA, West Virginia, Mount Storm L. KW - ASFA Aquaculture Abstracts; ASFA 1: Biological Sciences & Living Resources; Water Resources Abstracts KW - Freshwater KW - Q1 01604:Stock assessment and management KW - Q3 01582:Fish culture KW - SW 0850:Lakes KW - Q1 01582:Fish culture UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18409660?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Lakes+%26+Reservoirs%3A+Research+and+Management&rft.atitle=Effects+of+nutrient+enrichment+on+channel+catfish+growth+and+consumption+in+Mount+Storm+Lake%2C+West+Virginia&rft.au=Blanc%2C+T+J%3BMargraf%2C+F+J&rft.aulast=Blanc&rft.aufirst=T&rft.date=2002-06-01&rft.volume=7&rft.issue=2&rft.spage=109&rft.isbn=&rft.btitle=&rft.title=Lakes+%26+Reservoirs%3A+Research+and+Management&rft.issn=13205331&rft_id=info:doi/10.1046%2Fj.1440-169X.2002.00184.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1046/j.1440-169X.2002.00184.x ER - TY - JOUR T1 - The Global Transport of Dust AN - 18304957; 5356811 AB - An intercontinental river of dust, microorganisms and toxic chemicals flows through the Earth's atmosphere. JF - American Scientist AU - Griffin, D W AU - Kellogg, CA AU - Garrison, V H AU - Shinn, E A AD - USGS, 600 4th St. South, St. Petersburg, FL 33701, USA, dgriffin@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 228 EP - 235 PB - Sigma Xi, Scientific Research Society, Box 13975, 99 Alexander Dr. Research Triangle Park NC 27709 USA VL - 90 IS - 3 SN - 0003-0996, 0003-0996 KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts KW - Atmospheric particulates KW - Toxic materials KW - Pollution dispersion KW - Dust transport KW - Dust KW - Trans-boundary pollution KW - Microorganisms KW - Biological pollutants KW - Chemical pollution KW - Atmospheric pollution transport KW - Eolian processes KW - Eolian transport KW - Eolian dust KW - Q5 08503:Characteristics, behavior and fate KW - Q2 09188:Atmospheric chemistry KW - P 0000:AIR POLLUTION KW - M2 551.556.4:Transport of foreign bodies (pollutants) by wind (wind erosion) (551.556.4) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18304957?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Scientist&rft.atitle=The+Global+Transport+of+Dust&rft.au=Griffin%2C+D+W%3BKellogg%2C+CA%3BGarrison%2C+V+H%3BShinn%2C+E+A&rft.aulast=Griffin&rft.aufirst=D&rft.date=2002-06-01&rft.volume=90&rft.issue=3&rft.spage=228&rft.isbn=&rft.btitle=&rft.title=American+Scientist&rft.issn=00030996&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Atmospheric particulates; Pollution dispersion; Microorganisms; Biological pollutants; Eolian processes; Eolian transport; Eolian dust; Dust transport; Atmospheric pollution transport; Trans-boundary pollution; Toxic materials; Chemical pollution; Dust ER - TY - JOUR T1 - Global Modeling of Land Water and Energy Balances. Part II: Land-Characteristic Contributions to Spatial Variability AN - 1665487495; 5401211 AB - Land water and energy balances vary around the globe because of variations in amount and temporal distribution of water and energy supplies and because of variations in land characteristics. The former control (water and energy supplies) explains much more variance in water and energy balances than the latter (land characteristics). A largely untested hypothesis underlying most global models of land water and energy balance is the assumption that parameter values based on estimated geographic distributions of soil and vegetation characteristics improve the performance of the models relative to the use of globally constant land parameters. This hypothesis is tested here through an evaluation of the improvement in performance of one land model associated with the introduction of geographic information on land characteristics. The capability of the model to reproduce annual runoff ratios of large river basins, with and without information on the global distribution of albedo, rooting depth, and stomatal resistance, is assessed. To allow a fair comparison, the model is calibrated in both cases by adjusting globally constant scale factors for snow-free albedo, non-water-stressed bulk stomatal resistance, and critical root density (which is used to determine effective root-zone depth). The test is made in stand-alone mode, that is, using prescribed radiative and atmospheric forcing. Model performance is evaluated by comparing modeled runoff ratios with observed runoff ratios for a set of basins where precipitation biases have been shown to be minimal. The withholding of information on global variations in these parameters leads to a significant degradation of the capability of the model to simulate the annual runoff ratio. An additional set of optimization experiments, in which the parameters are examined individually, reveals that the stomatal resistance is, by far, the parameter among these three whose spatial variations add the most predictive power to the model in stand-alone mode. Further single-parameter experiments with surface roughness length, available water capacity, thermal conductivity, and thermal diffusivity show very little sensitivity to estimated global variations in these parameters. Finally, it is found that even the constant-parameter model performance exceeds that of the Budyko and generalized Turc-Pike water-balance equations, suggesting that the model benefits also from information on the geographic variability of the temporal structure of forcing. JF - Journal of Hydrometeorology AU - Milly, PCD AU - Shmakin, AB AD - Water Resources Division, U.S. Geological Survey, NOAA/Geophysical Fluid Dynamics Laboratory, P.O. Box 308, Princeton, NJ 08542, cmilly@usgs.gov Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 301 EP - 310 PB - American Meteorological Society VL - 3 IS - 3 SN - 1525-755X, 1525-755X KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts KW - Variability KW - Continental Hydrology KW - Precipitation-runoff modeling KW - Hydrologic Budget KW - Spatial Distribution KW - Model Studies KW - Sensitivity Analysis KW - Hydrometeorology KW - Comparison Studies KW - Energy KW - Geography KW - Climate model evaluation KW - M2 551.579.4:Fluctuations of surface water (caused by precipitation) (551.579.4) KW - SW 0810:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665487495?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrometeorology&rft.atitle=Global+Modeling+of+Land+Water+and+Energy+Balances.+Part+II%3A+Land-Characteristic+Contributions+to+Spatial+Variability&rft.au=Milly%2C+PCD%3BShmakin%2C+AB&rft.aulast=Milly&rft.aufirst=PCD&rft.date=2002-06-01&rft.volume=3&rft.issue=3&rft.spage=301&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrometeorology&rft.issn=1525755X&rft_id=info:doi/10.1043%2F1525-7541%282002%29003%280301%3AGMOLWA%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Precipitation-runoff modeling; Climate model evaluation; Hydrometeorology; Sensitivity Analysis; Variability; Continental Hydrology; Comparison Studies; Energy; Hydrologic Budget; Geography; Spatial Distribution; Model Studies DO - http://dx.doi.org/10.1043/1525-7541(2002)003(0301:GMOLWA)2.0.CO;2 ER - TY - JOUR T1 - Polar Bears in the Beaufort Sea: A 30-Year Mark-Recapture Case History AN - 16182839; 5983155 AB - Knowledge of population size and trend is necessary to manage anthropogenic risks to polar bears (Ursus maritimus). Despite capturing over 1,025 females between 1967 and 1998, previously calculated estimates of the size of the southern Beaufort Sea (SBS) population have been unreliable. We improved estimates of numbers of polar bears by modeling heterogeneity in capture probability with covariates. Important covariates referred to the year of the study, age of the bear, capture effort, and geographic location. Our choice of best approximating model was based on the inverse relationship between variance in parameter estimates and likelihood of the fit and suggested a growth from similar to 500 to over 1,000 females during this study. The mean coefficient of variation on estimates for the last decade of the study was 0.16-the smallest yet derived. A similar model selection approach is recommended for other projects where a best model is not identified by likelihood criteria alone. JF - Journal of Agricultural, Biological and Environmental Statistics AU - Amstrup, S C AU - McDonald, T L AU - Stirling, I AD - U.S. Geological Services, Biological Resources Division, Alaska Science Center, 1011 East Tudor Road, Anchorage, AK, 99503, Steven_Amstrup@usgs.gov Y1 - 2002/06// PY - 2002 DA - June 2002 SP - 221 EP - 234 PB - International Biometric Society, 1444 I Street NW Suite 700 Washington, DC 20005-6542 USA, [mailto:ibs@bostromdc.com] VL - 6 IS - 2 SN - 1085-7117, 1085-7117 KW - Polar bear KW - Biotechnology and Bioengineering Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Bioengineering Abstracts KW - Capture-recapture KW - Covariates KW - Logistic modeling KW - Population estimation KW - PNW, Beaufort Sea KW - Marine KW - Mathematical models KW - Statistical analysis KW - Anthropogenic factors KW - Population dynamics KW - Dangerous organisms KW - Long-term records KW - Capture-recapture studies KW - Ursus maritimus KW - Nature conservation KW - Ecosystem management KW - Approximation KW - Aquatic mammals KW - Population number KW - Modelling KW - Q5 08523:Conservation, wildlife management and recreation KW - W4 220:Environmental Modeling KW - Q1 08442:Population dynamics KW - Q1 08371:General KW - W 30965:Miscellaneous, Reviews UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16182839?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Agricultural%2C+Biological+and+Environmental+Statistics&rft.atitle=Polar+Bears+in+the+Beaufort+Sea%3A+A+30-Year+Mark-Recapture+Case+History&rft.au=Amstrup%2C+S+C%3BMcDonald%2C+T+L%3BStirling%2C+I&rft.aulast=Amstrup&rft.aufirst=S&rft.date=2002-06-01&rft.volume=6&rft.issue=2&rft.spage=221&rft.isbn=&rft.btitle=&rft.title=Journal+of+Agricultural%2C+Biological+and+Environmental+Statistics&rft.issn=10857117&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2005-09-01 N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Dangerous organisms; Long-term records; Ecosystem management; Nature conservation; Anthropogenic factors; Approximation; Population dynamics; Aquatic mammals; Modelling; Population number; Capture-recapture studies; Mathematical models; Statistical analysis; Ursus maritimus; PNW, Beaufort Sea; Marine ER - TY - JOUR T1 - Geochemistry of rock units at the potential repository level, Yucca Mountain, Nevada AN - 16151098; 5409967 AB - The compositional variability of the phenocryst-poor member of the 12.8 Ma Topopah Spring Tuff at the potential repository level was assessed by duplicate analysis of 20 core samples from the cross drift at Yucca Mountain, Nevada. Previous analyses of outcrop and core samples of the Topopah Spring Tuff showed that the phenocryst-poor rhyolite, which includes both lithophysal and nonlithophysal zones, is relatively uniform in composition. Analyses of rock samples from the cross drift, the first from the actual potential repository block, also indicate the chemical homogeneity of this unit excluding localized deposits of vapor-phase minerals and low-temperature calcite and opal in fractures, cavities, and faults. The possible influence of vapor-phase minerals and calcite and opal coatings on rock composition at a scale sufficiently large to incorporate these heterogeneously distributed deposits was evaluated and is considered to be relatively minor. Therefore, the composition of the phenocryst-poor member of the Topopah Spring Tuff is considered to be adequately represented by the analyses of samples from the cross drift. The mean composition as represented by the 10 most abundant oxides in wt.% or g/100 g is: SiO sub(2), 76.29; Al sub(2)O sub(3), 12.55; FeO, 0.14; Fe sub(2)O sub(3), 0.97; MgO, 0.13; CaO, 0.50; Na sub(2)O, 3.52; K sub(2)O, 4.83; TiO sub(2), 0.11; and MnO, 0.07. JF - Applied Geochemistry AU - Peterman, ZE AU - Cloke, P L AD - US Geological Survey, MS 963 Box 25046 DFC, Denver, CO 80225, USA, peterman@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 683 EP - 698 VL - 17 IS - 6 SN - 0883-2927, 0883-2927 KW - USA, Nevada, Yucca Mt. KW - Water Resources Abstracts KW - Radioactive Wastes KW - Rock Properties KW - Waste Disposal KW - Geochemistry KW - Geology KW - SW 0880:Chemical processes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16151098?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=Geochemistry+of+rock+units+at+the+potential+repository+level%2C+Yucca+Mountain%2C+Nevada&rft.au=Peterman%2C+ZE%3BCloke%2C+P+L&rft.aulast=Peterman&rft.aufirst=ZE&rft.date=2002-06-01&rft.volume=17&rft.issue=6&rft.spage=683&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-07-01 N1 - SuppNotes - Special Issue: Geochemistry of Yucca Mountain, Nevada: A Potential Site for a High-Level Nuclear Waste Repository. N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Rock Properties; Radioactive Wastes; Waste Disposal; Geochemistry; Geology ER - TY - JOUR T1 - super(234)U/ super(238)U evidence for local recharge and patterns of ground-water flow in the vicinity of Yucca Mountain, Nevada, USA AN - 16151019; 5409970 AB - Uranium concentrations and super(234)U/ super(238)U ratios in saturated-zone and perched ground water were used to investigate hydrologic flow and downgradient dilution and dispersion in the vicinity of Yucca Mountain, a potential high-level radioactive waste disposal site. The U data were obtained by thermal ionization mass spectrometry on more than 280 samples from the Death Valley regional flow system. Large variations in both U concentrations (commonly 0.6-10 mu g l super(-1)) and super(234)U/ super(238)U activity ratios (commonly 1.5-6) are present on both local and regional scales; however, ground water with super(234)U/ super(238)U activity ratios from 7 up to 8.06 is restricted largely to samples from Yucca Mountain. Data from ground water in the Tertiary volcanic and Quaternary alluvial aquifers at and adjacent to Yucca Mountain plot in 3 distinct fields of reciprocal U concentration versus super(234)U/ super(238)U activity ratio correlated to different geographic areas. Ground water to the west of Yucca Mountain has large U concentrations and moderate super(234)U/ super(238)U whereas ground water to the east in the Fortymile flow system has similar super(234)U/ super(238)U, but distinctly smaller U concentrations. Ground water beneath the central part of Yucca Mountain has intermediate U concentrations but distinctive super(234)U/ super(238)U activity ratios of about 7-8. Perched water from the lower part of the unsaturated zone at Yucca Mountain has similarly large values of super(234)U/ super(238)U. These U data imply that the Tertiary volcanic aquifer beneath the central part of Yucca Mountain is isolated from north-south regional flow. The similarity of super(234)U/ super(238)U in both saturated- and unsaturated-zone ground water at Yucca Mountain further indicates that saturated-zone ground water beneath Yucca Mountain is dominated by local recharge rather than regional flow. The distinctive super(234)U/ super(238)U signatures also provide a natural tracer of downgradient flow. Elevated super(234)U/ super(238)U in ground water from two water-supply wells east of Yucca Mountain are interpreted as the result of induced flow from 40 a of ground-water withdrawal. Elevated super(234)U/ super(238)U in a borehole south of Yucca Mountain is interpreted as evidence that natural downgradient flow is more likely to follow southerly paths in the structurally anisotropic Tertiary volcanic aquifer where it becomes diluted by regional flow in the Fortymile system. JF - Applied Geochemistry AU - Paces, J B AU - Ludwig, K R AU - Peterman, ZE AU - Neymark, LA AD - US Geological Survey, Denver Federal Center, Box 25046, MS 963, Denver, CO 80225, USA, jbpaces@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 751 EP - 779 VL - 17 IS - 6 SN - 0883-2927, 0883-2927 KW - USA, Nevada, Yucca Mt. KW - Aqualine Abstracts; Water Resources Abstracts KW - Recharge KW - Radioactive Wastes KW - Waste Disposal KW - Groundwater flow KW - Hydrogeology KW - Radioactive wastes KW - Uranium KW - Geohydrology KW - Waste disposal KW - Groundwater Movement KW - Groundwater Recharge KW - SW 3050:Ultimate disposal of wastes KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16151019?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=super%28234%29U%2F+super%28238%29U+evidence+for+local+recharge+and+patterns+of+ground-water+flow+in+the+vicinity+of+Yucca+Mountain%2C+Nevada%2C+USA&rft.au=Paces%2C+J+B%3BLudwig%2C+K+R%3BPeterman%2C+ZE%3BNeymark%2C+LA&rft.aulast=Paces&rft.aufirst=J&rft.date=2002-06-01&rft.volume=17&rft.issue=6&rft.spage=751&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-08-01 N1 - SuppNotes - Special Issue: Geochemistry of Yucca Mountain, Nevada: A Potential Site for a High-Level Nuclear Waste Repository. N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Recharge; Uranium; Hydrogeology; Groundwater flow; Radioactive wastes; Waste disposal; Radioactive Wastes; Waste Disposal; Geohydrology; Groundwater Recharge; Groundwater Movement ER - TY - JOUR T1 - The geohydrologic setting of Yucca Mountain, Nevada AN - 16148615; 5409966 AB - This paper provides a geologic and hydrologic framework of the Yucca Mountain region for the geochemical papers in this volume. The regional geologic units, which range in age from late Precambrian through Holocene, are briefly described. Yucca Mountain is composed of dominantly pyroclastic units that range in age from 11.4 to 15.2 Ma. The principal focus of study has been on the Paintbrush Group, which includes two major zoned and welded ash-flow tuffs separated by an important hydrogeologic unit referred to as the Paintbrush non-welded (PTn). The regional structural setting is currently one of extension, and the major local tectonic domains are presented together with a tectonic model that is consistent with the known structures at Yucca Mountain. Streamflow in this arid to semi-arid region occurs principally in intermittent or ephemeral channels. Near Yucca Mountain, the channels of Fortymile Wash and Amargosa River collect infrequent runoff from tributary basins, ultimately draining to Death Valley. Beneath the surface, large-scale interbasin flow of groundwater from one valley to another occurs commonly in the region. Regional groundwater flow beneath Yucca Mountain originates in the high mesas to the north and returns to the surface either in southern Amargosa Desert or in Death Valley, where it is consumed by evapotranspiration. The water table is very deep beneath the upland areas such as Yucca Mountain, where it is 500-750 m below the land surface, providing a large thickness of unsaturated rocks that are potentially suitable to host a nuclear-waste repository. The nature of unsaturated flow processes, which are important for assessing radionuclide migration, are inferred mainly from hydrochemical or isotopic evidence, from pneumatic tests of the fracture systems, and from the results of in situ experiments. Water seeping down through the unsaturated zone flows rapidly through fractures and more slowly through the pores of the rock matrix. Although capillary forces are expected to divert much of the flow around repository openings, some may drip onto waste packages, ultimately causing release of radionuclides, followed by transport down to the water table. JF - Applied Geochemistry AU - Stuckless, J S AU - Dudley, W W AD - US Geological Survey, MS 425, Denver Federal Center, Denver, CO 80225, USA, stuckles@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 659 EP - 682 VL - 17 IS - 6 SN - 0883-2927, 0883-2927 KW - USA, Nevada, Yucca Mt. KW - unsaturated zone KW - water table KW - Aqualine Abstracts; Pollution Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts KW - Radioactive waste disposal KW - Flow KW - Hydrogeology KW - Arid environments KW - Water table KW - Freshwater KW - Evaluation KW - Unsaturated Flow KW - Waste disposal sites KW - Ground water KW - Hydrology KW - Geology KW - Waste disposal KW - Siting criteria KW - Sites KW - Volcanic rocks KW - Geologic Units KW - Fate of Pollutants KW - Groundwater flow KW - Geochemistry KW - Radioactive wastes KW - Water Table KW - Site selection KW - Radioactive Waste Disposal KW - Underground Waste Disposal KW - Sedimentary structures KW - Geohydrology KW - Radioisotopes KW - Nuclear energy KW - Groundwater Movement KW - Hazardous wastes KW - SW 3050:Ultimate disposal of wastes KW - Q2 09144:Regional studies, expeditions and data reports KW - P 8000:RADIATION KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality KW - Q2 09265:Sedimentary structures and stratigraphy KW - Q5 08522:Protective measures and control UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16148615?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+Geochemistry&rft.atitle=The+geohydrologic+setting+of+Yucca+Mountain%2C+Nevada&rft.au=Stuckless%2C+J+S%3BDudley%2C+W+W&rft.aulast=Stuckless&rft.aufirst=J&rft.date=2002-06-01&rft.volume=17&rft.issue=6&rft.spage=659&rft.isbn=&rft.btitle=&rft.title=Applied+Geochemistry&rft.issn=08832927&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2004-02-01 N1 - SuppNotes - Special Issue: Geochemistry of Yucca Mountain, Nevada: A Potential Site for a High-Level Nuclear Waste Repository. N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Volcanic rocks; Geochemistry; Arid environments; Radioactive wastes; Water table; Evaluation; Site selection; Sedimentary structures; Waste disposal sites; Ground water; Radioisotopes; Hydrology; Nuclear energy; Siting criteria; Waste disposal; Hazardous wastes; Flow; Radioactive waste disposal; Groundwater flow; Hydrogeology; Geology; Sites; Radioactive Waste Disposal; Unsaturated Flow; Geologic Units; Underground Waste Disposal; Fate of Pollutants; Geohydrology; Water Table; Groundwater Movement; Freshwater ER - TY - JOUR T1 - The Uprate and refurbishment are complete - now what? AN - 16142610; 5467409 AB - The US Bureau of Reclamation (USBR) is the second largest hydro power generator and the tenth largest electric utility (by installed capacity) in the US. Committed to the continued safe, efficient, and effective operation and maintenance of power facilities in protection of the Federal investment, USBR recently 'reinvented' its operation and maintenance programme (O&M) in order to improve practices at its many power facilities. JF - International Water Power and Dam Construction AU - Linke, D M AU - Milano, B AU - Carlson, K AU - Osburn, G AD - Power Resources Office Hydroelectric Research and Technical Services Group, Bureau of Reclamation, D-5400, D-8450, Box 25007 Denver, CO 80225, USA, dlinke@do.usbr.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 28 EP - 29 VL - 54 IS - 6 SN - 0306-400X, 0306-400X KW - Aqualine Abstracts KW - USA KW - Efficiency KW - Hydroelectric power KW - Power generation (Hydroelectric) KW - Electricity KW - AQ 00005:Underground Services and Water Use UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16142610?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=International+Water+Power+and+Dam+Construction&rft.atitle=The+Uprate+and+refurbishment+are+complete+-+now+what%3F&rft.au=Linke%2C+D+M%3BMilano%2C+B%3BCarlson%2C+K%3BOsburn%2C+G&rft.aulast=Linke&rft.aufirst=D&rft.date=2002-06-01&rft.volume=54&rft.issue=6&rft.spage=28&rft.isbn=&rft.btitle=&rft.title=International+Water+Power+and+Dam+Construction&rft.issn=0306400X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Efficiency; Hydroelectric power; Power generation (Hydroelectric); Electricity; USA ER - TY - JOUR T1 - Impact Source Determination With Biomonitoring Data In New York State: Concordance With Environmental Data AN - 16138923; 5419756 AB - An Impact Source Determination method, used to identify point and nonpoint sources of impacts to stream water quality on the basis of benthic macroinvertebrates, was examined for concordance with impairment sources inferred from chemical and physical site characteristics, watershed characteristics, and biomonitoring results collected from 26 sites in the Hudson River Basin during 1993-94. Most classifications agreed with the resulting interpretations; site locations on Canonical Correspondence Analysis triplots corresponded with interpretation of environmental gradients as (1) overall pollution including organic enrichment and contaminants from point and nonpoint sources, (2) nonpoint nutrients from both agricultural and urban sources, and (3) sediment and suspended organic carbon from agricultural runoff. High-level taxonomic resolution was important in identifying the environmental gradients, and may be necessary for impairment source identification. JF - Northeastern Naturalist AU - Riva-Murray, K AU - Bode, R W AU - Phillips, P J AU - Wall, G L AD - US Geological Survey, Water Resources Division, 425 Jordan Road, Troy, NY 12180-8349, USA, krmurray@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 127 EP - 162 PB - Humboldt Field Research Institute VL - 9 IS - 2 SN - 1092-6194, 1092-6194 KW - Ecology Abstracts; Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality KW - water quality KW - Pollution monitoring KW - Agricultural pollution KW - Organic carbon KW - Freshwater KW - Watersheds KW - Streams KW - Urban runoff KW - USA, New York, Hudson R. Basin KW - Carbon KW - Classification KW - biomonitoring KW - taxonomy KW - Agricultural runoff KW - Pollution indicators KW - Pollution KW - Bioindicators KW - Sediment pollution KW - Nonpoint sources KW - Data processing KW - River basins KW - Nonpoint pollution KW - USA, New York KW - classification KW - Contaminants KW - Zoobenthos KW - Indicator species KW - D 04070:Pollution KW - P 2000:FRESHWATER POLLUTION KW - Q5 08504:Effects on organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16138923?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Northeastern+Naturalist&rft.atitle=Impact+Source+Determination+With+Biomonitoring+Data+In+New+York+State%3A+Concordance+With+Environmental+Data&rft.au=Riva-Murray%2C+K%3BBode%2C+R+W%3BPhillips%2C+P+J%3BWall%2C+G+L&rft.aulast=Riva-Murray&rft.aufirst=K&rft.date=2002-06-01&rft.volume=9&rft.issue=2&rft.spage=127&rft.isbn=&rft.btitle=&rft.title=Northeastern+Naturalist&rft.issn=10926194&rft_id=info:doi/10.1043%2F1092-6194%282002%29009%280127%3AISDWBD%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-11-01 N1 - Last updated - 2014-05-05 N1 - SubjectsTermNotLitGenreText - Urban runoff; Pollution monitoring; Agricultural pollution; Zoobenthos; Pollution indicators; Indicator species; Nonpoint sources; Carbon; Data processing; Classification; biomonitoring; River basins; Contaminants; Pollution; Bioindicators; Sediment pollution; water quality; Organic carbon; classification; taxonomy; Watersheds; Nonpoint pollution; Agricultural runoff; Streams; USA, New York, Hudson R. Basin; USA, New York; Freshwater DO - http://dx.doi.org/10.1043/1092-6194(2002)009(0127:ISDWBD)2.0.CO;2 ER - TY - JOUR T1 - Regional patterns of pesticide concentrations in surface waters of New York in 1997 AN - 16138311; 5441448 AB - The predominant mixtures of pesticides found in New York surface waters consist of five principal components. First, herbicides commonly used on corn (atrazine, metolachlor, alachlor, cyanazine) and a herbicide degradate (deethylatrazine) were positively correlated to a corn-herbicide component, and watersheds with the highest corn-herbicide component scores were those in which large amounts of row crops are grown. Second, two insecticides (diazinon and carbaryl) and one herbicide (prometon) widely used in urban and residential settings were positively correlated to an urban/residential component. Watersheds with the highest urban/residential component scores were those with large amounts of urban and residential land use. A third component was related to two herbicides (EPTC and cyanazine) used on dry beans and corn, the fourth to an herbicide (simazine) and an insecticide (carbaryl) commonly used in orchards and vineyards, and the fifth to an herbicide (DCPA). Results of this study indicate that this approach can be used to: (1) identify common mixtures of pesticides in surface waters, (2) relate these mixtures to land use and pesticide applications, and (3) indicate regions where these mixtures of pesticides are commonly found. JF - Journal of the American Water Resources Association AU - Phillips, P J AU - Eckhardt, DA AU - Freehafer, DA AU - Wall, G R AU - Ingleston, H H AD - U.S. Geological Survey, 425 Jordan Road, Troy, New York 12180, USA, pjphilli@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 731 EP - 746 VL - 38 IS - 3 SN - 1093-474X, 1093-474X KW - USA, New York KW - ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Land Use KW - Agriculture KW - Regional Analysis KW - Water sampling KW - Water Pollution Sources KW - Surface water KW - Principal Component Analysis KW - Statistical analysis KW - Man-induced effects KW - Surface Water KW - Watersheds KW - Urban runoff KW - Insecticides KW - Data Interpretation KW - Agricultural runoff KW - Data Collections KW - Urban areas KW - Pollution detection KW - Pesticides (see also Bactericides, Weedkillers) KW - Drainage KW - Herbicides KW - Data collections KW - Pollutant identification KW - Inland water environment KW - Land use KW - Urban Areas KW - Pesticides KW - Surface water (see also Lakes, Ponds, Streams) KW - Pollution (Water) KW - Drainage water KW - Q5 08503:Characteristics, behavior and fate KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16138311?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Water+Resources+Association&rft.atitle=Regional+patterns+of+pesticide+concentrations+in+surface+waters+of+New+York+in+1997&rft.au=Phillips%2C+P+J%3BEckhardt%2C+DA%3BFreehafer%2C+DA%3BWall%2C+G+R%3BIngleston%2C+H+H&rft.aulast=Phillips&rft.aufirst=P&rft.date=2002-06-01&rft.volume=38&rft.issue=3&rft.spage=731&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Water+Resources+Association&rft.issn=1093474X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Pollution detection; Surface water; Man-induced effects; Herbicides; Watersheds; Pollutant identification; Inland water environment; Land use; Urban runoff; Insecticides; Pesticides; Agricultural runoff; Drainage water; Water sampling; Drainage; Agriculture; Pesticides (see also Bactericides, Weedkillers); Statistical analysis; Surface water (see also Lakes, Ponds, Streams); Data collections; Pollution (Water); Urban areas; Land Use; Regional Analysis; Water Pollution Sources; Urban Areas; Principal Component Analysis; Surface Water; Data Interpretation; Data Collections ER - TY - JOUR T1 - Evaluating the influence of source basins on downstream water quality in the Mississippi River AN - 16136567; 5441453 AB - Chemical variability in the Mississippi River during water years 1989 to 1998 was evaluated using stream discharge and water-quality data in conjunction with the DAFLOW/BLTM hydraulic model. Model simulations were used to identify subbasin contributions of water and chemical constituents to the Mississippi River upstream from its confluence with the Ohio and the Mississippi River and at the Atchafalaya Diversion in Louisiana. Concentrations of dissolved solids, sodium, and sulfate at the Thebes site showed a general decreasing trend, and concentrations of silica and nitrate showed a general increasing trend as the percentage of discharge from the Mississippi River upstream from Grafton increased. Concentrations of most chemical constituents in the Mississippi River at the Atchafalaya Diversion exhibited a decreasing trend as the percentage of water from the Ohio River increased. Regression models were used to evaluate the importance of the source of water to the water chemistry in the Mississippi River at Thebes and the Atchafalaya Diversion. The addition of terms in regression equations to account for the percent of water from subbasins improved coefficients of determination for predicting chemical concentrations by as much as nine percent at the Thebes site and by as much as 48 percent at the Atchafalaya Diversion site. The addition of source-water terms to regression equations increased the estimated annual loads of nitrate and silica delivered from the Mississippi River Basin to the Gulf of Mexico by as much as 14 and 13 percent, respectively. JF - Journal of the American Water Resources Association AU - Clark, G M AU - Broshears, R E AU - Hooper, R P AU - Goolsby, DA AD - U.S. Geological Survey, 230 Collins Road, Boise, Idaho 83702, USA, gmclark@usgs.gov Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 803 EP - 818 VL - 38 IS - 3 SN - 1093-474X, 1093-474X KW - USA, Mississippi R. KW - regression analysis KW - stream discharge KW - subbasin contributions KW - tributaries KW - ASFA 3: Aquatic Pollution & Environmental Quality; Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Provenance KW - Regression Analysis KW - Pollution monitoring KW - Hydraulic models KW - Pollution dispersion KW - Freshwater KW - Water quality KW - Pollutants KW - Regression analysis KW - Hydrology KW - Chemical Composition KW - Data Interpretation KW - Tributaries KW - Freshwater pollution KW - Rivers KW - Chemical composition KW - Hydraulic Models KW - Water Quality KW - Flow Discharge KW - Simulation KW - Modelling (-general-) KW - Streams (in natural channels) KW - Model Studies KW - Stream flow KW - USA, Louisiana, Atchafalaya Diversion KW - Load Distribution KW - Chemical pollutants KW - Water quality (Natural waters) KW - Q5 08503:Characteristics, behavior and fate KW - SW 5010:Network design KW - SW 3010:Identification of pollutants KW - P 2000:FRESHWATER POLLUTION KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16136567?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+the+American+Water+Resources+Association&rft.atitle=Evaluating+the+influence+of+source+basins+on+downstream+water+quality+in+the+Mississippi+River&rft.au=Clark%2C+G+M%3BBroshears%2C+R+E%3BHooper%2C+R+P%3BGoolsby%2C+DA&rft.aulast=Clark&rft.aufirst=G&rft.date=2002-06-01&rft.volume=38&rft.issue=3&rft.spage=803&rft.isbn=&rft.btitle=&rft.title=Journal+of+the+American+Water+Resources+Association&rft.issn=1093474X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Provenance; Rivers; Pollution monitoring; Pollutants; Hydraulic models; Pollution dispersion; Chemical pollutants; Tributaries; Stream flow; Freshwater pollution; Chemical composition; Simulation; Hydrology; Water quality; Regression analysis; Modelling (-general-); Streams (in natural channels); Water quality (Natural waters); Regression Analysis; Hydraulic Models; Load Distribution; Water Quality; Flow Discharge; Chemical Composition; Data Interpretation; Model Studies; USA, Louisiana, Atchafalaya Diversion; Freshwater ER - TY - JOUR T1 - Inorganic Analytes in Light-Footed Clapper Rail Eggs, in Their Primary Prey, and in Sediment From Two California Salt Marsh Habitats AN - 1439231415; 18619648 AB - Abstract not Available JF - Bulletin of Environmental Contamination and Toxicology AU - Hui, CA AU - Goodbred, S L AU - Ledig, D B AU - Roberts, CA AD - U.S.G.S., Western Ecological Research Center, Davis Field Station, 278 Kerr Hall, University of California, 1 Shields Avenue, Davis, CA 95616-5224, USA, US Y1 - 2002/06// PY - 2002 DA - Jun 2002 SP - 870 EP - 877 PB - Springer Science+Business Media, Van Godewijckstraat 30 Dordrecht 3311 GX Netherlands VL - 68 IS - 6 SN - 0007-4861, 0007-4861 KW - Pollution Abstracts; Environment Abstracts; Toxicology Abstracts KW - Eggs KW - USA, California KW - Prey KW - P 2000:FRESHWATER POLLUTION KW - X:24360 KW - ENA 02:Toxicology & ENAironmental Safety UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1439231415?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxicologyabstracts&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+Environmental+Contamination+and+Toxicology&rft.atitle=Inorganic+Analytes+in+Light-Footed+Clapper+Rail+Eggs%2C+in+Their+Primary+Prey%2C+and+in+Sediment+From+Two+California+Salt+Marsh+Habitats&rft.au=Hui%2C+CA%3BGoodbred%2C+S+L%3BLedig%2C+D+B%3BRoberts%2C+CA&rft.aulast=Hui&rft.aufirst=CA&rft.date=2002-06-01&rft.volume=68&rft.issue=6&rft.spage=870&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+Environmental+Contamination+and+Toxicology&rft.issn=00074861&rft_id=info:doi/10.1007%2Fs00128-002-0035-4 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2013-10-01 N1 - Last updated - 2014-02-21 N1 - SubjectsTermNotLitGenreText - Prey; USA, California DO - http://dx.doi.org/10.1007/s00128-002-0035-4 ER - TY - JOUR T1 - Hazard assessment of selenium to endangered razorback suckers (Xyrauchen texanus) AN - 19936437; 5435435 AB - A hazard assessment was conducted based on information derived from two reproduction studies conducted with endangered razorback suckers (Xyrauchen texanus) at three sites near Grand Junction, CO, USA. Selenium contamination of the upper and lower Colorado River basin has been documented in water, sediment, and biota in studies by US Department of the Interior agencies and academia. Concern has been raised that this selenium contamination may be adversely affecting endangered fish in the upper Colorado River basin. The reproduction studies with razorback suckers revealed that adults readily accumulated selenium in various tissues including eggs, and that 4.6 mu g/g of selenium in food organisms caused increased mortality of larvae. The selenium hazard assessment protocol resulted in a moderate hazard at the Horsethief site and high hazards at the Adobe Creek and North Pond sites. The selenium hazard assessment was considered conservative because an on-site toxicity test with razorback sucker larvae using 4.6 mu g/g selenium in zooplankton caused nearly complete mortality, in spite of the moderate hazard at Horsethief. Using the margin of uncertainty ratio also suggested a high hazard for effects on razorback suckers from selenium exposure. Both assessment approaches suggested that selenium in the upper Colorado River basin adversely affects the reproductive success of razorback suckers. JF - Science of the Total Environment AU - Hamilton, S J AU - Holley, K M AU - Buhl, K J AD - US Geological Survey, Biological Resources Division, Columbia Environmental Research Center, Field Research Station, 31247 436th Avenue, Yankton, SD 57078-6364, USA, steve_hamilton@usgs.gov Y1 - 2002/05/27/ PY - 2002 DA - 2002 May 27 SP - 111 EP - 121 VL - 291 IS - 1-3 SN - 0048-9697, 0048-9697 KW - Razorback sucker KW - USA, Colorado R. basin KW - Risk Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Aqualine Abstracts; Toxicology Abstracts; Pollution Abstracts KW - Risk assessment KW - Water Pollution KW - Aquatic organisms KW - River Basins KW - Toxicity tests KW - Risks KW - Hazards KW - USA, Colorado R. KW - Selenium KW - Assessments KW - Xyrauchen texanus KW - Freshwater pollution KW - Risk analysis KW - Fish (see also Individual groups) KW - Toxicity KW - Heavy Metals KW - Risk KW - Water Pollution Effects KW - Endangered species KW - Fish KW - Reproduction KW - Toxicity testing KW - Polluted environments KW - X 24166:Environmental impact KW - P 2000:FRESHWATER POLLUTION KW - Q5 08504:Effects on organisms KW - SW 3030:Effects of pollution KW - AQ 00008:Effects of Pollution KW - R2 23050:Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19936437?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+of+the+Total+Environment&rft.atitle=Hazard+assessment+of+selenium+to+endangered+razorback+suckers+%28Xyrauchen+texanus%29&rft.au=Hamilton%2C+S+J%3BHolley%2C+K+M%3BBuhl%2C+K+J&rft.aulast=Hamilton&rft.aufirst=S&rft.date=2002-05-27&rft.volume=291&rft.issue=1-3&rft.spage=111&rft.isbn=&rft.btitle=&rft.title=Science+of+the+Total+Environment&rft.issn=00489697&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Hazards; Selenium; Reproduction; Toxicity tests; Risks; Freshwater pollution; Risk assessment; Polluted environments; Aquatic organisms; Endangered species; Toxicity testing; Water Pollution; Risk analysis; Fish (see also Individual groups); Heavy Metals; Risk; River Basins; Assessments; Water Pollution Effects; Fish; Toxicity; Xyrauchen texanus; USA, Colorado R. ER - TY - JOUR T1 - Accurate mass analysis of ethanesulfonic acid degradates of acetochlor and alachlor using high-performance liquid chromatography and time-of-flight mass spectrometry. AN - 71886036; 12102310 AB - Degradates of acetochlor and alachlor (ethanesulfonic acids, ESAs) were analyzed in both standards and in a groundwater sample using high-performance liquid chromatography-time-of-flight mass spectrometry with electrospray ionization. The negative pseudomolecular ion of the secondary amide of acetochlor ESA and alachlor ESA gave average masses of 256.0750+/-0.0049 amu and 270.0786+/-0.0064 amu respectively. Acetochlor and alachlor ESA gave similar masses of 314.1098+/-0.0061 amu and 314.1153+/-0.0048 amu; however, they could not be distinguished by accurate mass because they have the same empirical formula. On the other hand, they may be distinguished using positive-ion electrospray because of different fragmentation spectra, which did not occur using negative-ion electrospray. JF - Journal of chromatography. A AU - Thurman, E M AU - Ferrer, Imma AU - Parry, Rick AD - U.S. Geological Survey, Lawrence, KS 66049, USA. ethurman@usgs.gov Y1 - 2002/05/24/ PY - 2002 DA - 2002 May 24 SP - 3 EP - 9 VL - 957 IS - 1 SN - 0021-9673, 0021-9673 KW - Acetamides KW - 0 KW - Alkanesulfonates KW - Herbicides KW - Toluidines KW - alachlor KW - 24S2S61PXL KW - ethane sulfonate KW - 594-45-6 KW - acetochlor KW - 8L08WMO94K KW - Index Medicus KW - Toluidines -- chemistry KW - Acetamides -- chemistry KW - Herbicides -- chemistry KW - Chromatography, High Pressure Liquid -- methods KW - Alkanesulfonates -- chemistry KW - Mass Spectrometry -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71886036?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+chromatography.+A&rft.atitle=Accurate+mass+analysis+of+ethanesulfonic+acid+degradates+of+acetochlor+and+alachlor+using+high-performance+liquid+chromatography+and+time-of-flight+mass+spectrometry.&rft.au=Thurman%2C+E+M%3BFerrer%2C+Imma%3BParry%2C+Rick&rft.aulast=Thurman&rft.aufirst=E&rft.date=2002-05-24&rft.volume=957&rft.issue=1&rft.spage=3&rft.isbn=&rft.btitle=&rft.title=Journal+of+chromatography.+A&rft.issn=00219673&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-12-12 N1 - Date created - 2002-07-09 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - A Fresh Look at Glacial Floods AN - 1665486085; 5376783 AB - We tend to think of continental-scale ice sheets as rather ponderous affairs, inexorably advancing southward over the landscape and then slowly retreating to the north at the end of each ice age. Over the last 20 years, however, evidence has accumulated that this is a misconception. We now know that the Laurentide Ice Sheet--the largest ice-age glacier--was characterized by thin, marginal ice streams flowing rapidly on low-friction beds and was unstable through much of its history. The ice sheet periodically and abruptly discharged massive amounts of ice into the North Atlantic, and abrupt coolings and warmings occurred throughout the last ice age. JF - Science (Washington) AU - Colman, S M AD - U.S. Geological Survey, 384 Woods Hole Road, Woods Hole, MA 02543, USA, scolman@usgs.gov Y1 - 2002/05/17/ PY - 2002 DA - 2002 May 17 SP - 1251 EP - 1252 PB - American Association for the Advancement of Science VL - 296 IS - 5571 SN - 0036-8075, 0036-8075 KW - North America, Laurentide Ice Sheet KW - Oceanic Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Ice KW - Paleoclimatology KW - Glaciers KW - Climatic changes KW - Deglaciation KW - Palaeoclimate KW - AN, North Atlantic KW - Climatic change influences on ice sheets KW - Floods KW - Ice ages KW - Flooding KW - Glaciation KW - Climatic Changes KW - Q2 09148:Palaeo-studies KW - M2 551.583.7:Palaeoclimatology // Subdivide as 551.7 if necessary // (551.583.7) KW - SW 0820:Snow, ice and frost KW - O 2070:Meteorology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665486085?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+%28Washington%29&rft.atitle=A+Fresh+Look+at+Glacial+Floods&rft.au=Colman%2C+S+M&rft.aulast=Colman&rft.aufirst=S&rft.date=2002-05-17&rft.volume=296&rft.issue=5571&rft.spage=1251&rft.isbn=&rft.btitle=&rft.title=Science+%28Washington%29&rft.issn=00368075&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Ice; Floods; Climatic changes; Glaciers; Ice ages; Deglaciation; Palaeoclimate; Paleoclimatology; Climatic change influences on ice sheets; Glaciation; Flooding; Climatic Changes; AN, North Atlantic ER - TY - JOUR T1 - Probability of Nitrate Contamination of Recently Recharged Groundwaters in the Conterminous United States AN - 20576939; 5426548 AB - A new logistic regression (LR) model was used to predict the probability of nitrate contamination exceeding 4 mg/L in predominantly shallow, recently recharged groundwaters of the United States. The new model contains variables representing (1) N fertilizer loading (p 0.83. JF - Environmental Science & Technology AU - Nolan, B T AU - Hitt, K J AU - Ruddy, B C AD - U.S. Geological Survey, Reston, VA, USA, btnolan@usgs.gov Y1 - 2002/05/15/ PY - 2002 DA - 2002 May 15 SP - 2138 EP - 2145 VL - 36 IS - 10 SN - 0013-936X, 0013-936X KW - USA KW - Meteorological & Geoastrophysical Abstracts; Aqualine Abstracts; Water Resources Abstracts; Pollution Abstracts KW - Risk assessment KW - Aquifers KW - Nitrate KW - Contamination KW - Water Pollution Sources KW - Determination KW - Statistical analysis KW - Environmental sciences KW - Groundwater Pollution KW - Fertilizers KW - Groundwater recharge KW - Measuring methods KW - Recharge KW - Risk analysis KW - Mathematical models KW - Nitrates KW - Pollution (Groundwater) KW - Risk KW - Groundwater pollution KW - Contamination (see also Pollution) KW - Groundwater Recharge KW - M2 556.5:Surface Water Hydrology (556.5) KW - SW 3010:Identification of pollutants KW - P 2000:FRESHWATER POLLUTION KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20576939?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Science+%26+Technology&rft.atitle=Probability+of+Nitrate+Contamination+of+Recently+Recharged+Groundwaters+in+the+Conterminous+United+States&rft.au=Nolan%2C+B+T%3BHitt%2C+K+J%3BRuddy%2C+B+C&rft.aulast=Nolan&rft.aufirst=B&rft.date=2002-05-15&rft.volume=36&rft.issue=10&rft.spage=2138&rft.isbn=&rft.btitle=&rft.title=Environmental+Science+%26+Technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-02-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Aquifers; Environmental sciences; Statistical analysis; Groundwater pollution; Risk assessment; Groundwater recharge; Mathematical models; Contamination; Nitrates; Measuring methods; Pollution (Groundwater); Recharge; Nitrate; Risk analysis; Determination; Contamination (see also Pollution); Risk; Fertilizers; Water Pollution Sources; Groundwater Pollution; Groundwater Recharge ER - TY - JOUR T1 - Preserving the Distribution of Inorganic Arsenic Species in Groundwater and Acid Mine Drainage Samples AN - 19812975; 5426555 AB - The distribution of inorganic arsenic species must be preserved in the field to eliminate changes caused by metal oxyhydroxide precipitation, photochemical oxidation, and redox reactions. Arsenic species sorb to iron and manganese oxyhydroxide precipitates, and arsenite can be oxidized to arsenate by photolytically produced free radicals in many sample matrices. Several preservatives were evaluated to minimize metal oxyhydroxide precipitation, such as inorganic acids and ethylenediaminetetraacetic acid (EDTA). EDTA was found to work best for all sample matrices tested. Storing samples in opaque polyethylene bottles eliminated the effects of photochemical reactions. The preservation technique was tested on 71 groundwater and six acid mine drainage samples. Concentrations in groundwater samples reached 720 mu g-As/L for arsenite and 1080 mu g-As/L for arsenate, and acid mine drainage samples reached 13 000 mu g-As/L for arsenite and 3700 mu g-As/L for arsenate. The arsenic species distribution in the samples ranged from 0 to 90% arsenite. The stability of the preservation technique was established by comparing laboratory arsenic speciation results for samples preserved in the field to results for subsamples speciated onsite. Statistical analyses indicated that the difference between arsenite and arsenate concentrations for samples preserved with EDTA in opaque bottles and field speciation results were analytically insignificant. The percentage change in arsenite:arsenate ratios for a preserved acid mine drainage sample and groundwater sample during a 3-month period was -5 and +3%, respectively. JF - Environmental Science & Technology AU - Bednar, A J AU - Garbarino, J R AU - Ranville, J F AU - Wildeman, T R AD - U.S. Geological Survey, jrgarb@usgs.gov Y1 - 2002/05/15/ PY - 2002 DA - 2002 May 15 SP - 2213 EP - 2218 VL - 36 IS - 10 SN - 0013-936X, 0013-936X KW - ethylenediaminetetraacetic acid KW - Toxicology Abstracts; Sustainability Science Abstracts; Meteorological & Geoastrophysical Abstracts; Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - Speciation KW - Water sampling KW - Heavy metals KW - Polyethylene KW - Mine drainage KW - Chemical Analysis KW - Environmental sciences KW - Statistical analysis KW - Ethylenediaminetetraacetic acid KW - Groundwater Pollution KW - Distribution KW - Precipitation (Chemical) KW - Ground water KW - Sampling KW - Manganese KW - Arsenic KW - Acid Mine Drainage KW - Free radicals KW - Drainage KW - Arsenite KW - Precipitation KW - Mines KW - Mining waste waters KW - Storage KW - Performance Evaluation KW - Comparison Studies KW - Oxidation KW - Groundwater (see also Aquifers) KW - Preservation KW - Sample Preservation KW - Groundwater KW - Iron KW - Sampling methods KW - Preservatives KW - Edetic acid KW - M3 1010:Issues in Sustainable Development KW - SW 3010:Identification of pollutants KW - P 2000:FRESHWATER POLLUTION KW - X 24360:Metals KW - AQ 00003:Monitoring and Analysis of Water and Wastes KW - M2 556.3:Groundwater Hydrology (556.3) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19812975?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Science+%26+Technology&rft.atitle=Preserving+the+Distribution+of+Inorganic+Arsenic+Species+in+Groundwater+and+Acid+Mine+Drainage+Samples&rft.au=Bednar%2C+A+J%3BGarbarino%2C+J+R%3BRanville%2C+J+F%3BWildeman%2C+T+R&rft.aulast=Bednar&rft.aufirst=A&rft.date=2002-05-15&rft.volume=36&rft.issue=10&rft.spage=2213&rft.isbn=&rft.btitle=&rft.title=Environmental+Science+%26+Technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-09-01 N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Speciation; Arsenic; Heavy metals; Polyethylene; Drainage; Free radicals; Statistical analysis; Arsenite; Precipitation; Mines; Oxidation; Ground water; Preservation; Manganese; Iron; Preservatives; Edetic acid; Environmental sciences; Storage; Water sampling; Mine drainage; Groundwater; Sampling methods; Precipitation (Chemical); Groundwater (see also Aquifers); Ethylenediaminetetraacetic acid; Sampling; Mining waste waters; Performance Evaluation; Comparison Studies; Acid Mine Drainage; Distribution; Chemical Analysis; Groundwater Pollution; Sample Preservation ER - TY - JOUR T1 - Tracing and quantifying magmatic carbon discharge in cold groundwaters: lessons learned from Mammoth Mountain, USA AN - 17685188; 5930775 AB - A major campaign to quantify the magmatic carbon discharge in cold groundwaters around Mammoth Mountain volcano in eastern California was carried out from 1996 to 1999. The total water flow from all sampled cold springs was greater than or equal to 1.8 x 10 super(7) m super(3)/yr draining an area that receives an estimated 2.5 x 10 super(7) m super(3)/yr of recharge, suggesting that sample coverage of the groundwater system was essentially complete. Some of the waters contain magmatic helium with super(3)He/ super(4)He ratios as high as 4.5 times the atmospheric ratio, and a magmatic component in the dissolved inorganic carbon (DIC) can be identified in virtually every feature sampled. Many waters have a super(14)C of 0-5 pmC, a delta super(13)C near -5ppt, and contain high concentrations (20-50 mmol/l) of CO sub(2(aq)); but are otherwise dilute (specific CONDUCTANCE=100-300 mu S/cm) with low pH values between 5 and 6. Such waters have previously escaped notice at Mammoth Mountain, and possibly at many other volcanoes, because CO sub(2) is rapidly lost to the air as the water flows away from the springs, leaving neutral pH waters containing only 1-3 mmol/l HCO sub(3) super(-). The total discharge of magmatic carbon in the cold groundwater system at Mammoth Mountain is similar to 20000 t/yr (as CO sub(2)), ranging seasonally from about 30 to 90 t/day. Several types of evidence show that this high discharge of magmatic DIC arose in part because of shallow dike intrusion in 1989, but also demonstrate that a long-term discharge possibly half this magnitude ( similar to 10000 t/yr) predated that intrusion. To sustain a 10000 t/yr DIC discharge would require a magma intrusion rate of 0.057 km super(3) per century, assuming complete degassing of magma with 0.65 wt% CO sub(2) and a density of 2.7 t/m super(3). The geochemical data also identify a small (<1 t/day) discharge of magmatic DIC that can be traced to the Inyo Domes area north of Mammoth Mountain and outside the associated Long Valley caldera. This research, along with recent studies at Lassen Peak and other western USA volcanoes, suggests that the amount of magmatic carbon in cold groundwaters is important to constraining rates of intrusion and edifice weathering at individual volcanoes and may even represent a significant fraction of the global carbon discharge from volcanoes. JF - Journal of Volcanology and Geothermal Research AU - Evans, W C AU - Sorey, M L AU - Cook, A C AU - Kennedy, B M AU - Shuster, D L AU - Colvard, E M AU - White, L D AU - Huebner, MA AD - US Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, USA, wcevans@usgs.gov Y1 - 2002/05/15/ PY - 2002 DA - 2002 May 15 SP - 291 EP - 312 VL - 114 IS - 1-2 SN - 0377-0273, 0377-0273 KW - Water Resources Abstracts KW - Freshwater KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/17685188?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Volcanology+and+Geothermal+Research&rft.atitle=Tracing+and+quantifying+magmatic+carbon+discharge+in+cold+groundwaters%3A+lessons+learned+from+Mammoth+Mountain%2C+USA&rft.au=Evans%2C+W+C%3BSorey%2C+M+L%3BCook%2C+A+C%3BKennedy%2C+B+M%3BShuster%2C+D+L%3BColvard%2C+E+M%3BWhite%2C+L+D%3BHuebner%2C+MA&rft.aulast=Evans&rft.aufirst=W&rft.date=2002-05-15&rft.volume=114&rft.issue=1-2&rft.spage=291&rft.isbn=&rft.btitle=&rft.title=Journal+of+Volcanology+and+Geothermal+Research&rft.issn=03770273&rft_id=info:doi/10.1016%2FS0377-0273%2801%2900268-2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-12-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1016/S0377-0273(01)00268-2 ER - TY - JOUR T1 - The National Vegetation Classification Standard applied to the remote sensing classification of two semiarid environments. AN - 72007448; 12180183 AB - The National Vegetation Classification Standard (NVCS) was implemented at two US National Park Service (NPS) sites in Texas, the Padre Island National Seashore (PINS) and the Lake Meredith National Recreation Area (LMNRA), to provide information for NPS oil and gas management plans. Because NVCS landcover classifications did not exist for these two areas prior to this study, we created landcover classes, through intensive ground and aerial reconnaissance, that characterized the general landscape features and at the same time complied with NVCS guidelines. The created landcover classes were useful for the resource management and were conducive to classification with optical remote sensing systems, such as the Landsat Thematic Mapper (TM). In the LMNRA, topographic elevation data were added to the TM data to reduce confusion between cliff, high plains, and forest classes. Classification accuracies (kappa statistics) of 89.9% (0.89) and 88.2% (0.87) in PINS and LMNRA, respectively, verified that the two NPS landholdings were adequately mapped with TM data. Improved sensor systems with higher spectral and spatial resolutions will ultimately refine the broad classes defined in this classification; however, the landcover classifications created in this study have already provided valuable information for the management of both NPS lands. Habitat information provided by the classifications has aided in the placement of inventory and monitoring plots, has assisted oil and gas operators by providing information on sensitive habitats, and has allowed park managers to better use resources when fighting wildland fires and in protecting visitors and the infrastructure of NPS lands. JF - Environmental management AU - Ramsey, Elijah W AU - Nelson, Gene A AU - Echols, Darrell AU - Sapkota, Sijan K AD - US Geological Survey, National Wetlands Research Center, 700 Cajundome Blvd., Lafayette, Louisiana 70506, USA. elijah_ramsey@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 703 EP - 715 VL - 29 IS - 5 SN - 0364-152X, 0364-152X KW - Petroleum KW - 0 KW - Index Medicus KW - Reference Values KW - Desert Climate KW - Spacecraft KW - Industry KW - Ecosystem KW - Plants KW - Environmental Monitoring -- methods KW - Conservation of Natural Resources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/72007448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+management&rft.atitle=The+National+Vegetation+Classification+Standard+applied+to+the+remote+sensing+classification+of+two+semiarid+environments.&rft.au=Ramsey%2C+Elijah+W%3BNelson%2C+Gene+A%3BEchols%2C+Darrell%3BSapkota%2C+Sijan+K&rft.aulast=Ramsey&rft.aufirst=Elijah&rft.date=2002-05-01&rft.volume=29&rft.issue=5&rft.spage=703&rft.isbn=&rft.btitle=&rft.title=Environmental+management&rft.issn=0364152X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-19 N1 - Date created - 2002-08-15 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Influence of fracture anisotropy on ground water ages and chemistry, Valley and Ridge province, Pennsylvania. AN - 71735273; 12019639 AB - Model ground water ages based on chlorofluorocarbons (CFCs) and tritium/helium-3 (3H/3He) data were obtained from two arrays of nested piezometers located on the north limb of an anticline in fractured sedimentary rocks in the Valley and Ridge geologic province of Pennsylvania. The fracture geometry of the gently east plunging fold is very regular and consists predominately of south dipping to subhorizontal to north dipping bedding-plane parting and east striking, steeply dipping axial-plane spaced cleavage. In the area of the piezometer arrays, which trend north-south on the north limb of the fold, north dipping bedding-plane parting is a more dominant fracture set than is steeply south dipping axial-plane cleavage. The dating of ground water from the piezometer arrays reveals that ground water traveling along paths parallel to the dip direction of bedding-plane parting has younger 3H/3He and CFC model ages, or a greater component of young water, than does ground water traveling along paths opposite to the dip direction. In predominantly unmixed samples there is a strong positive correlation between age of the young fraction of water and dissolved sodium concentration. The travel times inferred from the model ages are significantly longer than those previously calculated by a ground water flow model, which assumed isotropically fractured layers parallel to topography. A revised model factors in the directional anisotropy to produce longer travel times. Ground water travel times in the watershed therefore appear to be more influenced by anisotropic fracture geometry than previously realized. This could have significant implications for ground water models in other areas underlain by similarly tilted or folded sedimentary rock, such as elsewhere in the Valley and Ridge or the early Mesozoic basins. JF - Ground water AU - Burton, William C AU - Plummer, L Niel AU - Busenberg, Eurybiades AU - Lindsey, Bruce D AU - Gburek, William J AD - U.S. Geological Survey, Reston, VA 20192, USA. bburton@usgs.gov PY - 2002 SP - 242 EP - 257 VL - 40 IS - 3 SN - 0017-467X, 0017-467X KW - Chlorofluorocarbons KW - 0 KW - Water KW - 059QF0KO0R KW - Tritium KW - 10028-17-8 KW - Helium KW - 206GF3GB41 KW - Index Medicus KW - Environmental Monitoring KW - Geological Phenomena KW - Helium -- analysis KW - Water Movements KW - Chlorofluorocarbons -- analysis KW - Geology KW - Pennsylvania KW - Tritium -- analysis KW - Time Factors KW - Water -- chemistry KW - Water Supply UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71735273?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ground+water&rft.atitle=Influence+of+fracture+anisotropy+on+ground+water+ages+and+chemistry%2C+Valley+and+Ridge+province%2C+Pennsylvania.&rft.au=Burton%2C+William+C%3BPlummer%2C+L+Niel%3BBusenberg%2C+Eurybiades%3BLindsey%2C+Bruce+D%3BGburek%2C+William+J&rft.aulast=Burton&rft.aufirst=William&rft.date=2002-05-01&rft.volume=40&rft.issue=3&rft.spage=242&rft.isbn=&rft.btitle=&rft.title=Ground+water&rft.issn=0017467X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-07 N1 - Date created - 2002-05-21 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - VOCs, pesticides, nitrate, and their mixtures in groundwater used for drinking water in the United States. AN - 71716948; 12026972 AB - Samples of untreated groundwater from 1255 domestic drinking-water wells and 242 public supply wells were analyzed as part of the National Water-Quality Assessment Program of the U.S. Geological Survey between 1992 and 1999. Wells were sampled to define the regional quality of the groundwater resource and, thus, were distributed geographically across large aquifers, primarily in rural areas. For each sample, as many as 60 volatile organic compounds (VOCs), 83 pesticides, and nitrate were analyzed. On the basis of previous studies, nitrate concentrations as nitrogen > or = 3 mg/L were considered to have an anthropogenic origin. VOCs were detected more frequently (44%) than pesticides (38%) or anthropogenic nitrate (28%). Seventy percent of the samples contained at least one VOC, pesticide, or anthropogenic nitrate; 47% contained at least two compounds; and 33% contained at least three compounds. The combined concentrations of VOCs and pesticides ranged from about 0.001 to 100 microg/L, with a median of 0.02 microg/L. Water from about 12% of the wells contained one or more compounds that exceeded U.S. Environmental Protection Agency drinking-water standards or human health criteria, primarily because of nitrate concentrations exceeding the maximum contaminant level in domestic wells. A mixture is defined as a unique combination of two or more particular compounds, regardless of the presence of other compounds that may occur in the same sample. There were 100 mixtures (significantly associated with agricultural land use) that had a detection frequency between 2% and 19%. There were 302 mixtures (significantly associated with urban land use) that had a detection frequency between 1% and <2%. Only 14 compounds (seven VOCs, six pesticides, and nitrate) contributed over 95% of the detections in these 402 mixtures; however, most samples with these mixtures also contain a variety of other compounds. JF - Environmental science & technology AU - Squillace, Paul J AU - Scott, Jonathon C AU - Moran, Michael J AU - Nolan, B T AU - Kolpin, Dana W AD - U.S. Geological Survey, Rapid City, South Dakota 57702, USA. pjsquill@usgs.gov Y1 - 2002/05/01/ PY - 2002 DA - 2002 May 01 SP - 1923 EP - 1930 VL - 36 IS - 9 SN - 0013-936X, 0013-936X KW - Nitrates KW - 0 KW - Pesticides KW - Soil Pollutants KW - Water Pollutants, Chemical KW - Index Medicus KW - United States KW - Environmental Monitoring KW - Reference Values KW - United States Environmental Protection Agency KW - Humans KW - Volatilization KW - Data Collection KW - Pesticides -- analysis KW - Water Pollutants, Chemical -- analysis KW - Water Supply KW - Nitrates -- analysis KW - Soil Pollutants -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71716948?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=VOCs%2C+pesticides%2C+nitrate%2C+and+their+mixtures+in+groundwater+used+for+drinking+water+in+the+United+States.&rft.au=Squillace%2C+Paul+J%3BScott%2C+Jonathon+C%3BMoran%2C+Michael+J%3BNolan%2C+B+T%3BKolpin%2C+Dana+W&rft.aulast=Squillace&rft.aufirst=Paul&rft.date=2002-05-01&rft.volume=36&rft.issue=9&rft.spage=1923&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-19 N1 - Date created - 2002-05-24 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Transport and fate of nitrate in a glacial outwash aquifer in relation to ground water age, land use practices, and redox processes. AN - 71706886; 12026081 AB - A combination of ground water modeling, chemical and dissolved gas analyses, and chlorofluorocarbon age dating of water was used to determine the relation between changes in agricultural practices, and NO3- concentrations in ground water of a glacial outwash aquifer in west-central Minnesota. The results revealed a redox zonation throughout the saturated zone with oxygen reduction occurring near the water table, NO3- reduction immediately below it, and then a large zone of ferric iron reduction, with a small area of sulfate (SO4(2-)) reduction and methanogenesis (CH4) near the end of the transsect. Analytical and NETPATH modeling results supported the hypothesis that organic carbon served as the electron donor for the redox reactions. Denitrification rates were quite small, 0.005 to 0.047 mmol NO3- yr(-1), and were limited by the small amounts of organic carbon, 0.01 to 1.45%. In spite of the organic carbon limitation, denitrification was virtually complete because residence time is sufficient to allow even slow processes to reach completion. Ground water sample ages showed that maximum residence times were on the order of 50 to 70 yr. Reconstructed NO3- concentrations, estimated from measured NO3- and dissolved N gas showed that NO3- concentrations have been increasing in the aquifer since the 1940s, and have been above the 714 micromol L(-1) maximum contaminant level at most sites since the mid- to late-1960s. This increase in NO3- has been accompanied by a corresponding increase in agricultural use of fertilizer, identified as the major source of NO3- to the aquifer. JF - Journal of environmental quality AU - Puckett, Larry J AU - Cowdery, Timothy K AD - U.S. Geological Survey, Reston, VA 20192, USA. lpuckett@usgs.gov PY - 2002 SP - 782 EP - 796 VL - 31 IS - 3 SN - 0047-2425, 0047-2425 KW - Ions KW - 0 KW - Nitrates KW - Water Pollutants KW - Water KW - 059QF0KO0R KW - Iron KW - E1UOL152H7 KW - Oxygen KW - S88TT14065 KW - Index Medicus KW - Oxidation-Reduction KW - Minnesota KW - Humans KW - Time Factors KW - Models, Theoretical KW - Water Pollutants -- analysis KW - Water -- chemistry KW - Iron -- chemistry KW - Oxygen -- chemistry KW - Nitrates -- chemistry UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71706886?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+quality&rft.atitle=Transport+and+fate+of+nitrate+in+a+glacial+outwash+aquifer+in+relation+to+ground+water+age%2C+land+use+practices%2C+and+redox+processes.&rft.au=Puckett%2C+Larry+J%3BCowdery%2C+Timothy+K&rft.aulast=Puckett&rft.aufirst=Larry&rft.date=2002-05-01&rft.volume=31&rft.issue=3&rft.spage=782&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+quality&rft.issn=00472425&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-07 N1 - Date created - 2002-05-23 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Preliminary comparison of landscape pattern-normalized difference vegetation index (NDVI) relationships to Central Plains stream conditions. AN - 71706721; 12026088 AB - We explored relationships of water quality parameters with landscape pattern metrics (LPMs), land use-land cover (LULC) proportions, and the advanced very high resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) or NDVI-derived metrics. Stream sites (271) in Nebraska, Kansas, and Missouri were sampled for water quality parameters, the index of biotic integrity, and a habitat index in either 1994 or 1995. Although a combination of LPMs (interspersion and juxtaposition index, patch density, and percent forest) within Ozark Highlands watersheds explained >60% of the variation in levels of nitrite-nitrate nitrogen and conductivity, in most cases the LPMs were not significantly correlated with the stream data. Several problems using landscape pattern metrics were noted: small watersheds having only one or two patches, collinearity with LULC data, and counterintuitive or inconsistent results that resulted from basic differences in land use-land cover patterns among ecoregions or from other factors determining water quality. The amount of variation explained in water quality parameters using multiple regression models that combined LULC and LPMs was generally lower than that from NDVI or vegetation phenology metrics derived from time-series NDVI data. A comparison of LPMs and NDVI indicated that NDVI had greater promise for monitoring landscapes for stream conditions within the study area. JF - Journal of environmental quality AU - Griffith, Jerry A AU - Martinko, Edward A AU - Whistler, Jerry L AU - Price, Kevin P AD - Dep. of Geography, Univ. of Kansas, Lawrence 66045, USA. griffith@usgs.gov PY - 2002 SP - 846 EP - 859 VL - 31 IS - 3 SN - 0047-2425, 0047-2425 KW - Water Pollutants, Chemical KW - 0 KW - Index Medicus KW - Regression Analysis KW - Kansas KW - Fresh Water KW - Missouri KW - Humans KW - Geography KW - Nebraska KW - Ecosystem KW - Agriculture KW - Water Pollutants, Chemical -- analysis KW - Satellite Communications KW - Environmental Monitoring -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71706721?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+quality&rft.atitle=Preliminary+comparison+of+landscape+pattern-normalized+difference+vegetation+index+%28NDVI%29+relationships+to+Central+Plains+stream+conditions.&rft.au=Griffith%2C+Jerry+A%3BMartinko%2C+Edward+A%3BWhistler%2C+Jerry+L%3BPrice%2C+Kevin+P&rft.aulast=Griffith&rft.aufirst=Jerry&rft.date=2002-05-01&rft.volume=31&rft.issue=3&rft.spage=846&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+quality&rft.issn=00472425&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-11-07 N1 - Date created - 2002-05-23 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Mineral assessment of the Stikine area, central Southeast Alaska AN - 51983124; 2003-038427 AB - In 1997 the U.S. Department of the Interior, Bureau of Land Management (BLM) began a 4-year mineral resource assessment of the Stikine area in central Southeast Alaska. The 5.7-million-acre study area encompasses the mainland bordering Frederick Sound and Kupreanof, Kuiu, Zarembo, Wrangell, Etolin, and nearby islands. The study area covers the Kupreanof and Petersburg Mining Districts, the Wrangell Subdistrict, and additional lands not included in adjacent mining district studies. As the primary land manager in the area, the U.S. Department of Agriculture, Forest Service, requested that the BLM assess the mineral potential in the Stikine area for the purpose of generating information that will aid the agency in future judgements regarding land management. This report serves as the final, comprehensive presentation of information gathered during the Stikine area study from 1997 to 2000. Over 175 mineral occurrences, industrial mineral sites, and geophysical anomalies were examined during this study. Also, over 130 localities were sampled to follow up road systems, USGS geochemical anomalies, and unpublished, mineral exploration company data. The Stikine area hosts a variety of mineral deposit types, including volcanogenic massive sulfide (VMS), polymetallic replacement, polymetallic vein, vein gold, skarn, porphyry molybdenum, magmatic segregation, and veins of barite. In addition, there are minor deposits of placer gold, uranium, and coal. The Castle Island Mine produced 787,000 tons of barite between 1966 and 1980 (Carnes, 1980) from a VMS deposit. Minor gold production came from vein gold deposits of the Maid of Mexico (Chapin, 1918) and Helen S (Wright and Wright, 1908) mines in the early part of the twentieth century (U.S. Bureau of Mines, Mine Production Records). Based on the distribution and types of prospects, geology, geophysics, deposit models, and information from mineral exploration companies, this report delineates the Duncan Canal, Groundhog-Berg Basin, and Cornwallis Peninsula areas as "known mineral deposit areas" (KMDA's). This implies that these areas have a higher relative likelihood for hosting a significant mineral deposit than other parts of the Stikine area. The Duncan Canal KMDA, located along Duncan Canal, and on Woewodski and Zarembo islands, contains 19 sites with known or suspected VMS mineralization. These occurrences share Triassic host rocks of the Alexander terrane with deposits of known significance to the north, the Greens Creek Mine on Admiralty Island and the massive Windy Craggy deposit in northwestern British Columbia. The Groundhog-Berg Basin KMDA is located on the mainland near Wrangell. It contains 20 prospects with replacement, skarn, polymetallic vein, and vein gold mineralization and also some potential for porphyry copper and molybdenum deposits. The deposits in the area are rich in silver, lead, and zinc and have attracted significant exploration over the years. The Cornwallis Peninsula KMDA on the north end of Kuiu Island is host to several polymetallic replacement and polymetallic vein deposits of lead and zinc and several small deposits of barite and witherite. As they are presently understood, these occurrences are too small and discontinuous to attract development. However, there are sufficient values and indications of extent to attract some exploration interest. JF - BLM - Alaska Technical Report AU - Still, Jan C AU - Bittenbender, Peter E AU - Bean, Kirby W AU - Gensler, Edward G Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 557 EP - 557, 4 sheets PB - U. S. Department of the Interior, Bureau of Land Management, Alaska State Office, Anchorage, AK KW - Scale: 1:250,000 KW - Type: site location maps KW - Type: colored site location maps KW - Type: colored index map KW - Type: colored economic geology maps KW - United States KW - mineral exploration KW - molybdenum ores KW - igneous rocks KW - Petersburg mining district KW - Alexander Archipelago KW - silver ores KW - spatial distribution KW - Stikine Alaska KW - metamorphic rocks KW - polymetallic ores KW - gold ores KW - copper ores KW - skarn KW - Southeastern Alaska KW - geophysical methods KW - site location maps KW - veins KW - porphyry KW - massive sulfide deposits KW - uranium ores KW - maps KW - metal ores KW - massive deposits KW - economic geology maps KW - Alaska KW - index maps KW - metasomatic rocks KW - Kupreanof mining district KW - 27A:Economic geology, geology of ore deposits UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51983124?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/GeoRef&rft_val_fmt=info:ofi/fmt:kev:mtx:book&rft.genre=book&rft.jtitle=&rft.atitle=&rft.au=Still%2C+Jan+C%3BBittenbender%2C+Peter+E%3BBean%2C+Kirby+W%3BGensler%2C+Edward+G&rft.aulast=Still&rft.aufirst=Jan&rft.date=2002-05-01&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=Mineral+assessment+of+the+Stikine+area%2C+central+Southeast+Alaska&rft.title=Mineral+assessment+of+the+Stikine+area%2C+central+Southeast+Alaska&rft.issn=&rft_id=info:doi/ L2 - http://www.blm.gov/ak/st/en/info/gen_pubs/tr.html LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2003-01-01 N1 - Number of references - 220 N1 - PubXState - AK N1 - Document feature - illus. incl. 5 tables, sects. N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - CODEN - #04969 N1 - SubjectsTermNotLitGenreText - Alaska; Alexander Archipelago; copper ores; economic geology maps; geophysical methods; gold ores; igneous rocks; index maps; Kupreanof mining district; maps; massive deposits; massive sulfide deposits; metal ores; metamorphic rocks; metasomatic rocks; mineral exploration; molybdenum ores; Petersburg mining district; polymetallic ores; porphyry; silver ores; site location maps; skarn; Southeastern Alaska; spatial distribution; Stikine Alaska; United States; uranium ores; veins ER - TY - JOUR T1 - Analysis of delta super(15)N and delta super(18)O to differentiate NO super(-) sub(3) sources in runoff at two watersheds in the Catskill Mountains of New York AN - 20670271; 5445028 AB - To quantify the movement of atmospheric nitrogen deposition through two forested watersheds in the Catskill Mountains of New York, dual-isotope analysis ( delta super(15)N and delta super(18)O) was used to differentiate NO super(-) sub(3) derived from precipitation from NO super(-) sub(3) derived by microbial nitrification and to quantify the contributions of these sources to NO super(-) sub(3) in drainage waters. Samples of stream water, soil water, precipitation, snowmelt, and O-horizon soil were collected during the March and April snowmelt period of 1994 and throughout an 18-month period from August 1995 through February 1997. The mean delta super(18)O-NO super(-) sub(3) value of precipitation was +50.5ppt, whereas the mean values for stream water and soil water were +17.7ppt and +23.6ppt, respectively. The mean delta super(15)N-NO super(-) sub(3) of precipitation was -0.2ppt, that of soil water was +1.4ppt, and that of stream water was +2.3ppt; these values showed greater overlap among the three different waters than did the delta super(18)O-NO super(-) sub(3) values, indicating that delta super(15)N-NO super(-) sub(3) was not as useful for source separation. Soil water delta super(18)O-NO super(-) sub(3) values decreased, and delta super(15)N-NO super(-) sub(3) values increased, from the O to the B and C horizons, but most of the differences among horizons were not statistically significant. Nitrate derived by nitrification in incubated soil samples had a wide range of delta super(15)N-NO super(-) sub(3) values, from +1.5ppt to +16.1ppt, whereas delta super(18)O-NO super(-) sub(3) values ranged more narrowly, from +13.2ppt to +16.0ppt. Values of delta super(18)O-NO super(-) sub(3) indicated that NO super(-) sub(3) in stream water is mainly derived from nitrification. Only during a high-flow event that exceeded the annual flood was precipitation a major contributor to stream water NO super(-) sub(3). Values of delta super(18)O-NO super(-) sub(3) and delta super(15)N-NO super(-) sub(3) changed at differing rates as NO super(-) sub(3) cycled through these watersheds because delta super(18)O-NO super(-) sub(3) values change sharply through the incorporation of oxygen from ambient water and gas during nitrification, whereas delta super(15)N-NO super(-) sub(3) values change only incrementally through fractionation during biocycling processes. The results of this study show that most NO super(-) sub(3) is first cycled through the biota and nitrified before entering the stream. JF - Water Resources Research AU - Burns, DA AU - Kendall, C AD - U.S. Geological Survey, 425 Jordan Road, Troy, NY 12180, USA, daburns@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 VL - 38 IS - 5 SN - 0043-1397, 0043-1397 KW - USA, New York, Catskill Mts. KW - Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts; Meteorological & Geoastrophysical Abstracts KW - Nitrate KW - Pollution (Air) KW - Precipitation (Atmospheric) KW - Water Pollution Sources KW - Path of Pollutants KW - Rainfall KW - Freshwater KW - Watersheds KW - Forest Watersheds KW - Streams KW - Mountains KW - Soil KW - Biota KW - Catchment areas KW - Floods KW - Precipitation chemistry KW - Air Pollution KW - Atmospheric precipitations KW - Runoff composition KW - Nitrates KW - Soil Bacteria KW - Isotope Studies KW - Precipitation KW - Soil organisms KW - Watershed chemistry KW - USA, New York KW - Oxygen isotopes KW - Oxygen KW - Soil water chemistry KW - Nitrogen deposition KW - Fractionation KW - Nitrification KW - Snowmelt KW - Nitrogen isotopes KW - Pollution (Water) KW - Snowmelt water pollution KW - Runoff KW - Nitrogen KW - Q5 08503:Characteristics, behavior and fate KW - P 2000:FRESHWATER POLLUTION KW - M2 556.11:Water properties (556.11) KW - SW 3020:Sources and fate of pollution KW - Q2 09182:Methods and instruments KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20670271?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Analysis+of+delta+super%2815%29N+and+delta+super%2818%29O+to+differentiate+NO+super%28-%29+sub%283%29+sources+in+runoff+at+two+watersheds+in+the+Catskill+Mountains+of+New+York&rft.au=Burns%2C+DA%3BKendall%2C+C&rft.aulast=Burns&rft.aufirst=DA&rft.date=2002-05-01&rft.volume=38&rft.issue=5&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000292 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-02-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Oxygen isotopes; Nitrification; Nitrates; Nitrogen isotopes; Watersheds; Runoff; Soil water chemistry; Nitrogen deposition; Runoff composition; Precipitation chemistry; Snowmelt water pollution; Watershed chemistry; Rainfall; Streams; Soil; Mountains; Oxygen; Biota; Fractionation; Floods; Snowmelt; Nitrogen; Nitrate; Precipitation (Atmospheric); Pollution (Air); Catchment areas; Pollution (Water); Soil organisms; Air Pollution; Path of Pollutants; Water Pollution Sources; Soil Bacteria; Precipitation; Isotope Studies; Forest Watersheds; USA, New York; Freshwater DO - http://dx.doi.org/10.1029/2001WR000292 ER - TY - JOUR T1 - Character, fate, and biological effects of contaminated, effluent-affected sediment on the Palos Verdes margin, southern California: an overview AN - 19576324; 5437604 AB - The Palos Verdes Hills and Peninsula lie on the southeast margin of the greater Los Angeles metropolitan area. Immediately south of the peninsula, the Whites Point outfall, one of the nation's largest, discharges wastewater onto the outer continental shelf and has done so for over 60 years. Solid particles carried by the wastewater mix with geologic materials and produce a layer of sediment heavily affected by the effluent both in terms of the presence of organic carbon and the presence of contaminants. During the 1950s and 1960s, the world's largest producer of dischlorodiphenyltrichloroethane (DDT) was connected to the Los Angeles County sewer system, which collects and treats wastewater that is then discharged through the ocean outfall. Significant quantities of DDT from the manufacturing plant entered the waste stream and were deposited on the Palos Verdes margin with the effluent-affected sediment. Release of DDT wastes from the manufacturing plant to the sewer system was terminated in the early 1970s but residues retained in the sewer system continued to be discharged for several years. Subsequent discharges from the Whites Point outfall have emplaced sediment with low levels of contamination above the highly contaminanted effluent-affected deposit. Once deposited, however, biological, chemical, and physical processes have modified and partly mixed the sediment, introducing contaminants from the deeper part of the effluent-affected deposit into the surface layers. These processes continue to occur even today. The 14 papers of this volume can be divided into three categories: (1) mapping the extent and character of the deposit, (2) measuring the factors that cause the deposit to change with time and modeling that change, and (3) determining the effect of the deposit on the chemical and biological environment. JF - Continental Shelf Research AU - Lee, HJ AU - Wiberg, P L AD - US Geological Survey, 345 Middlefield Road, Mail Stop 999, Menlo Park, CA 94025, USA, hjlee@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 835 EP - 840 VL - 22 IS - 6-7 SN - 0278-4343, 0278-4343 KW - Whites Point outfall KW - pesticide residues KW - surface sediments KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocean Technology Policy & Non-Living Resources; Pollution Abstracts; Oceanic Abstracts KW - USA, California, Los Angeles Cty. KW - Ocean dumping KW - INE, USA, California, Palos Verdes KW - Ecosystems KW - USA, California, Palos Verdes Hills KW - Pollution dispersion KW - Pollution effects KW - Surface layers KW - Outer continental shelf KW - Industrial wastes KW - Continental shelves KW - Pollutant persistence KW - Mapping KW - Sedimentation KW - USA, California, Palos Verdes Margin KW - Marine KW - Sediment pollution KW - Sediment chemistry KW - Pollution detection KW - Biogeochemical cycle KW - Geochemistry KW - Wastes KW - INE, USA, California, Los Angeles KW - Fate KW - INE, USA, California, Palos Verdes Peninsula KW - Outfalls KW - INE, USA, California, Los Angeles Cty. KW - Marine pollution KW - DDT KW - Pesticides KW - Wastewater discharges KW - Marine organisms KW - Chemical pollutants KW - Q5 08503:Characteristics, behavior and fate KW - Q1 08482:Ecosystems and energetics KW - Q2 09187:Geochemistry of sediments KW - P 1000:MARINE POLLUTION KW - O 4060:Pollution - Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19576324?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Continental+Shelf+Research&rft.atitle=Character%2C+fate%2C+and+biological+effects+of+contaminated%2C+effluent-affected+sediment+on+the+Palos+Verdes+margin%2C+southern+California%3A+an+overview&rft.au=Lee%2C+HJ%3BWiberg%2C+P+L&rft.aulast=Lee&rft.aufirst=HJ&rft.date=2002-05-01&rft.volume=22&rft.issue=6-7&rft.spage=835&rft.isbn=&rft.btitle=&rft.title=Continental+Shelf+Research&rft.issn=02784343&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-03-01 N1 - SuppNotes - Special Issue: "Sedimentation Processes, DDT, and the Palos Verde Margin". N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Ocean dumping; Sediment chemistry; Sediment pollution; Pollution detection; Ecosystems; Biogeochemical cycle; Geochemistry; Pollution dispersion; Wastes; Pollution effects; Surface layers; Outer continental shelf; Fate; Outfalls; Industrial wastes; Marine pollution; Continental shelves; Pesticides; DDT; Pollutant persistence; Marine organisms; Mapping; Sedimentation; Chemical pollutants; Wastewater discharges; USA, California, Palos Verdes Margin; USA, California, Los Angeles Cty.; INE, USA, California, Los Angeles Cty.; INE, USA, California, Palos Verdes; USA, California, Palos Verdes Hills; INE, USA, California, Los Angeles; INE, USA, California, Palos Verdes Peninsula; Marine ER - TY - JOUR T1 - Spatial and temporal distribution of contaminated, effluent-affected sediment on the Palos Verdes margin, southern California AN - 19574409; 5437606 AB - A sedimentary deposit on the continental margin near the Palos Verdes Peninsula, California is comprised of sewage effluent and geologic materials and is contaminated with metals, pesticides (including DDT and associated compounds), and PCBs. The deposit was mapped with subbottom acoustic profilers, and sediment cores were analyzed for geochemical and physical properties to determine the volume of the deposit and the distribution and mass of contaminants. Mapping showed that the deposit ranges up to 60-cm thick, has a total volume exceeding 9 million m super(3), and covers over 40 km super(2). Virtually the entire effluent-affected deposit is contaminated with DDT and PCBs. Nearly half of the area of the deposit lies on the continental slope, but 70-75% of the volume of the deposit and total mass of DDT reside on the continental shelf. Analysis of data collected biennially since 1981 by the Sanitation Districts of Los Angeles County show that the mass of DDT has apparently decreased at some stations but has remained essentially constant at others. Temporal changes in mass per unit area of DDT are not statistically significant (at the 90% confidence level) at the most contaminated locations over a 16-yr period. The results of this mapping effort were used as a basis for modeling efforts described elsewhere in this issue. JF - Continental Shelf Research AU - Lee, HJ AU - Sherwood, C R AU - Drake, DE AU - Edwards, B D AU - Wong, F AU - Hamer, M AD - US Geological Survey, 345 Middlefield Rd., Mail Stop 999, Menlo Park, CA 94025, USA, hjlee@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 859 EP - 880 VL - 22 IS - 6-7 SN - 0278-4343, 0278-4343 KW - USA, California KW - Whites Point outfall KW - mass per unit area KW - pesticide residues KW - temporal variations KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts; Pollution Abstracts; Oceanic Abstracts KW - USA, California, Los Angeles Cty. KW - Ocean dumping KW - Path of Pollutants KW - Heavy metals KW - Polychlorinated Biphenyls KW - Ecological distribution KW - Pollution dispersion KW - Core analysis KW - USA, California, Palos Verdes KW - Sewage disposal KW - INE, USA, California, Palos Verde Peninsula KW - Polychlorinated biphenyls KW - Continental shelves KW - Sediment Contamination KW - Mapping KW - Sedimentation KW - Wastewater disposal KW - PCB compounds KW - PCB KW - USA, California, Palos Verdes Margin KW - Marine KW - Metals KW - Sediment pollution KW - Pollution detection KW - Temporal variations KW - Sub-bottom profiling KW - Geochemistry KW - USA, California, Palos Verdes Peninsula KW - Contaminated sediments KW - INE, USA, California, Palos Verdes Peninsula KW - Outfalls KW - Physical properties KW - Sewage KW - Sediment properties KW - Pesticides KW - DDT KW - Wastewater Disposal KW - Q5 08503:Characteristics, behavior and fate KW - SW 3020:Sources and fate of pollution KW - P 1000:MARINE POLLUTION KW - Q2 09261:General KW - AQ 00002:Water Quality KW - O 4060:Pollution - Environment UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19574409?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Continental+Shelf+Research&rft.atitle=Spatial+and+temporal+distribution+of+contaminated%2C+effluent-affected+sediment+on+the+Palos+Verdes+margin%2C+southern+California&rft.au=Lee%2C+HJ%3BSherwood%2C+C+R%3BDrake%2C+DE%3BEdwards%2C+B+D%3BWong%2C+F%3BHamer%2C+M&rft.aulast=Lee&rft.aufirst=HJ&rft.date=2002-05-01&rft.volume=22&rft.issue=6-7&rft.spage=859&rft.isbn=&rft.btitle=&rft.title=Continental+Shelf+Research&rft.issn=02784343&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-04-01 N1 - SuppNotes - Special Issue: "Sedimentation Processes, DDT, and the Palos Verde Margin". N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Ocean dumping; Sediment pollution; Pollution detection; Temporal variations; Heavy metals; Ecological distribution; Sub-bottom profiling; Pollution dispersion; Core analysis; Sewage disposal; Physical properties; Outfalls; Sediment properties; Continental shelves; DDT; Pesticides; Mapping; Sedimentation; PCB; Metals; Sewage; Geochemistry; PCB compounds; Polychlorinated biphenyls; Wastewater disposal; Contaminated sediments; Path of Pollutants; Polychlorinated Biphenyls; Wastewater Disposal; Sediment Contamination; USA, California, Palos Verdes Margin; USA, California, Los Angeles Cty.; INE, USA, California, Palos Verde Peninsula; USA, California, Palos Verdes Peninsula; USA, California, Palos Verdes; INE, USA, California, Palos Verdes Peninsula; Marine ER - TY - JOUR T1 - The use of photographic rates to estimate densities of tigers and other cryptic mammals: a comment on misleading conclusions AN - 18593046; 5462998 AB - The search for easy-to-use indices that substitute for direct estimation of animal density is a common theme in wildlife and conservation science, but one fraught with well-known perils (Nichols & Conroy, 1996; Yoccoz, Nichols & Boulinier, 2001; Pollock et al., 2002). To establish the utility of an index as a substitute for an estimate of density, one must: (1) demonstrate a functional relationship between the index and density that is invariant over the desired scope of inference; (2) calibrate the functional relationship by obtaining independent measures of the index and the animal density; (3) evaluate the precision of the calibration (Diefenbach et al., 1994). Carbone et al. (2001) argue that the number of camera-days per photograph is a useful index of density for large, cryptic, forest-dwelling animals, and proceed to calibrate this index for tigers (Panthera tigris). We agree that a properly calibrated index may be useful for rapid assessments in conservation planning. However, Carbone et al. (2001), who desire to use their index as a substitute for density, do not adequately address the three elements noted above. Thus, we are concerned that others may view their methods as justification for not attempting directly to estimate animal densities, without due regard for the shortcomings of their approach. JF - Animal Conservation AU - Jennelle, C S AU - Runge, M C AU - MacKenzie, DI AD - US Geological Survey, Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, MD 20708-4017, USA, Michael_Runge@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 119 EP - 120 VL - 5 IS - 2 SN - 1367-9430, 1367-9430 KW - Tiger KW - Ecology Abstracts KW - D 04001:Methodology - general KW - D 04705:Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18593046?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Animal+Conservation&rft.atitle=The+use+of+photographic+rates+to+estimate+densities+of+tigers+and+other+cryptic+mammals%3A+a+comment+on+misleading+conclusions&rft.au=Jennelle%2C+C+S%3BRunge%2C+M+C%3BMacKenzie%2C+DI&rft.aulast=Jennelle&rft.aufirst=C&rft.date=2002-05-01&rft.volume=5&rft.issue=2&rft.spage=119&rft.isbn=&rft.btitle=&rft.title=Animal+Conservation&rft.issn=13679430&rft_id=info:doi/10.1017%2FS1367943002002160 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1017/S1367943002002160 ER - TY - JOUR T1 - Bayesian flood frequency analysis with paleohydrologic bound data AN - 18570831; 5445035 AB - It is valuable to construct likelihood functions that rigorously incorporate measurement errors and annual peak discharge, historical, and paleohydrologic bound information in Bayesian flood frequency analyses. Estimates of primary posterior modes for common three-parameter frequency distributions are constructed using simulated annealing and the simplex method. Parameter and flood frequency probability intervals are calculated directly by systematic parameter space integration. Bayesian flood frequency analyses with annual peak discharge, historical, and paleohydrologic bound data for the Santa Ynez River, California, and the Big Lost River, Idaho, demonstrate that paleohydrologic bounds reduce quantile biases by placing large observed peak discharges in their proper long-term contexts and substantially narrow peak discharge confidence intervals when estimating floods with low exceedance probabilities. JF - Water Resources Research AU - O'Connell, DRH AU - Ostenaa, DA AU - Levish AU - Klinger, R E AD - Seismotectonics and Geophysics Group, Denver Federal Center, D-8330, U. S. Bureau of Reclamation, Denver, CO 80225, USA, doconnell@do.usbr.gov Y1 - 2002/05// PY - 2002 DA - May 2002 VL - 38 IS - 5 SN - 0043-1397, 0043-1397 KW - USA, California, Santa Ynez R. KW - USA, Idaho, Big Lost R. KW - Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Freshwater KW - AQ 00001:Water Resources and Supplies KW - M2 556.53:Rivers, Streams, Canals (556.53) KW - SW 0835:Streamflow and runoff KW - M2 551.579:Hydrometeorology (551.579) KW - Q2 02171:Dynamics of lakes and rivers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18570831?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Bayesian+flood+frequency+analysis+with+paleohydrologic+bound+data&rft.au=O%27Connell%2C+DRH%3BOstenaa%2C+DA%3BLevish%3BKlinger%2C+R+E&rft.aulast=O%27Connell&rft.aufirst=DRH&rft.date=2002-05-01&rft.volume=38&rft.issue=5&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2000WR000028 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1029/2000WR000028 ER - TY - JOUR T1 - Development and evaluation of a local grid refinement method for block-centered finite-difference groundwater models using shared nodes AN - 18426580; 5408377 AB - A new method of local grid refinement for two-dimensional block-centered finite-difference meshes is presented in the context of steady-state groundwater-flow modeling. The method uses an iteration-based feedback with shared nodes to couple two separate grids. The new method is evaluated by comparison with results using a uniform fine mesh, a variably spaced mesh, and a traditional method of local grid refinement without a feedback. Results indicate: (1) The new method exhibits quadratic convergence for homogenous systems and convergence equivalent to uniform-grid refinement for heterogeneous systems. (2) Coupling the coarse grid with the refined grid in a numerically rigorous way allowed for improvement in the coarse-grid results. (3) For heterogeneous systems, commonly used linear interpolation of heads from the large model onto the boundary of the refined model produced heads that are inconsistent with the physics of the flow field. (4) The traditional method works well in situations where the better resolution of the locally refined grid has little influence on the overall flow-system dynamics, but if this is not true, lack of a feedback mechanism produced errors in head up to 3.6% and errors in cell-to-cell flows up to 25%. JF - Advances in Water Resources AU - Mehl, S AU - Hill, M C AD - US Geological Survey, 3215 Marine St., Boulder, CO 80303, USA, swmehl@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 497 EP - 511 VL - 25 IS - 5 SN - 0309-1708, 0309-1708 KW - Water Resources Abstracts; Aqualine Abstracts KW - AQ 00001:Water Resources and Supplies KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18426580?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Advances+in+Water+Resources&rft.atitle=Development+and+evaluation+of+a+local+grid+refinement+method+for+block-centered+finite-difference+groundwater+models+using+shared+nodes&rft.au=Mehl%2C+S%3BHill%2C+M+C&rft.aulast=Mehl&rft.aufirst=S&rft.date=2002-05-01&rft.volume=25&rft.issue=5&rft.spage=497&rft.isbn=&rft.btitle=&rft.title=Advances+in+Water+Resources&rft.issn=03091708&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Regional controls on geomorphology, hydrology, and ecosystem integrity in the Orinoco Delta, Venezuela AN - 18411459; 5394641 AB - Interacting river discharge, tidal oscillation, and tropical rainfall across the 22,000 km super(2) Orinoco delta plain support diverse fresh and brackish water ecosystems. To develop environmental baseline information for this largely unpopulated region, we evaluate major coastal plain, shallow marine, and river systems of northeastern South America, which serves to identify principal sources and controls of water and sediment flow into, through, and out of the Orinoco Delta. The regional analysis includes a summary of the geology, hydrodynamics, sediment dynamics, and geomorphic characteristics of the Orinoco drainage basin, river, and delta system. Because the Amazon River is a major source of sediment deposited along the Orinoco coast, we summarize Amazon water and sediment input to the northeastern South American littoral zone. We investigate sediment dynamics and geomorphology of the Guiana coast, where marine processes and Holocene history are similar to the Orinoco coast. Major factors controlling Orinoco Delta water and sediment dynamics include the pronounced annual flood discharge; the uneven distribution of water and sediment discharge across the delta plain; discharge of large volumes of water with low sediment concentrations through the Rio Grande and Araguao distributaries; water and sediment dynamics associated with the Guayana littoral current along the northeastern South American coast; inflow of large volumes of Amazon sediment to the Orinoco coast; development of a fresh water plume seaward of Boca Grande; disruption of the Guayana Current by Trinidad, Boca de Serpientes, and Gulf of Paria; and the constriction at Boca de Serpientes. JF - Geomorphology AU - Warne, A G AU - Meade, R H AU - White, WA AU - Guevara, E H AU - Gibeaut, J AU - Smyth, R C AU - Aslan, A AU - Tremblay, T AD - US Geological Survey, GSA Center 651 Federal Drive, Guaynabo, Puerto Rico, agwarne@usgs.gov Y1 - 2002/05/01/ PY - 2002 DA - 2002 May 01 SP - 273 EP - 307 VL - 44 IS - 3-4 SN - 0169-555X, 0169-555X KW - Venezuela KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts; Water Resources Abstracts KW - Marine KW - Brackish KW - Freshwater KW - Q2 02263:Topography and morphology KW - SW 0810:General KW - O 3050:Sediment Dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18411459?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Geomorphology&rft.atitle=Regional+controls+on+geomorphology%2C+hydrology%2C+and+ecosystem+integrity+in+the+Orinoco+Delta%2C+Venezuela&rft.au=Warne%2C+A+G%3BMeade%2C+R+H%3BWhite%2C+WA%3BGuevara%2C+E+H%3BGibeaut%2C+J%3BSmyth%2C+R+C%3BAslan%2C+A%3BTremblay%2C+T&rft.aulast=Warne&rft.aufirst=A&rft.date=2002-05-01&rft.volume=44&rft.issue=3-4&rft.spage=273&rft.isbn=&rft.btitle=&rft.title=Geomorphology&rft.issn=0169555X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Marine; Brackish; Freshwater ER - TY - JOUR T1 - Stable carbon and nitrogen isotope composition of aquatic and terrestrial plants of the San Francisco Bay estuarine system AN - 18410075; 5395237 AB - We report measurements of seasonal variability in the C-N stable isotope ratios of plants collected across the habitat mosaic of San Francisco Bay, its marshes, and its tributary river system. Analyses of 868 plant samples were binned into 10 groups (e.g., terrestrial riparian, freshwater phytoplankton, salt marsh) to determine whether C-N isotopes can be used as biomarkers for tracing the origins of organic matter in this river-marsh-estuary complex. Variability of delta super(13)C and delta super(15)N was high ( similar to 5-10ppt) within each plant group, and we identified three modes of variability: (1) between species and their microhabitats, (2) over annual cycles of plant growth and senescence, and (3) between living and decomposing biomass. These modes of within-group variability obscure any source-specific isotopic signatures, confounding the application of C-N isotopes for identifying the origins of organic matter. A second confounding factor was large dissimilarity between the delta super(13)C- delta super(15)N of primary producers and the organic-matter pools in the seston and sediments. Both confounding factors impede the application of C-N isotopes to reveal the food supply to primary consumers in ecosystems supporting diverse autotrophs and where the isotopic composition of organic matter has been transformed and become distinct from that of its parent plant sources. Our results support the advice of others: variability of C-N stable isotopes within all organic-matter pools is high and must be considered in applications of these isotopes to trace trophic linkages from primary producers to primary consumers. Isotope-based approaches are perhaps most powerful when used to complement other tools, such as molecular biomarkers, bioassays, direct measures of production, and compilations of organic-matter budgets. JF - Limnology and Oceanography AU - Cloern, JE AU - Canuel, E A AU - Harris, D AD - U.S. Geological Survey MS496, 345 Middlefield Road, Menlo Park, California 94025, USA, jecloern@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 713 EP - 729 VL - 47 IS - 3 SN - 0024-3590, 0024-3590 KW - USA, California, San Francisco Bay KW - Ecology Abstracts; Oceanic Abstracts; Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; ASFA 1: Biological Sciences & Living Resources KW - Marine KW - Brackish KW - Freshwater KW - O 1090:Instruments/Methods KW - Q2 02182:Methods and instruments KW - SW 0890:Estuaries KW - Q1 01382:Ecological techniques and apparatus KW - D 04320:Brackishwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18410075?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Limnology+and+Oceanography&rft.atitle=Stable+carbon+and+nitrogen+isotope+composition+of+aquatic+and+terrestrial+plants+of+the+San+Francisco+Bay+estuarine+system&rft.au=Cloern%2C+JE%3BCanuel%2C+E+A%3BHarris%2C+D&rft.aulast=Cloern&rft.aufirst=JE&rft.date=2002-05-01&rft.volume=47&rft.issue=3&rft.spage=713&rft.isbn=&rft.btitle=&rft.title=Limnology+and+Oceanography&rft.issn=00243590&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater; Brackish; Marine ER - TY - JOUR T1 - Effects of Hatching Time for Larval Ambystomatid Salamanders AN - 18387266; 5374088 AB - In aquatic communities, the phenology of breeding may influence species interactions. In the early-breeding marbled salamander, Ambystoma opacum, timing of pond filling may determine whether interactions among larvae are competitive or predatory. The objectives of our studies were to determine how time of egg hatching affected size, larval period, and survival to metamorphosis in A. opacum, and if early-hatching in A. opacum influenced the competitive and predator-prey relationships with smaller larvae of the mole salamander, Ambystoma talpoideum. Salamander larvae were reared from hatching through metamorphosis in large, outdoor enclosures located in a natural temporary pond in Aiken County, South Carolina, in two experiments. In study 1, we reared early- and late-hatching A. opacum larvae separately from hatching through metamorphosis. In study 2, we examined how early- versus late-hatching A. opacum affected a syntopic species, A. talpoideum. In general, early-hatching A. opacum were larger and older at metamorphosis, had greater survival, and left the pond earlier than late-hatching larvae. Ambystoma talpoideum reared in the presence of early-hatching A. opacum had lower survival than in controls, suggesting that A. opacum may predate upon A. talpoideum when they gain a growth advantage over later-hatching larvae. Our studies demonstrate that time of pond filling and phenology of breeding may influence population dynamics and alter the nature of relationships that develop among species. JF - Copeia AU - Boone, MD AU - Scott, DE AU - Niewiarowski, PH AD - 4200 New Haven Road, USGS Columbia Environmental Research Center, Columbia, Missouri 65201, michelle_boone@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 SP - 511 EP - 517 PB - The American Society of Ichthyologists and Herpetologists VL - 2002 IS - 2 SN - 0045-8511, 0045-8511 KW - Larvae KW - Marbled salamander KW - Mole salamander KW - ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Freshwater KW - Q1 01483:Species interactions: general KW - Q1 01324:Reproduction and development KW - D 04669:Amphibians UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18387266?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Copeia&rft.atitle=Effects+of+Hatching+Time+for+Larval+Ambystomatid+Salamanders&rft.au=Boone%2C+MD%3BScott%2C+DE%3BNiewiarowski%2C+PH&rft.aulast=Boone&rft.aufirst=MD&rft.date=2002-05-01&rft.volume=2002&rft.issue=2&rft.spage=511&rft.isbn=&rft.btitle=&rft.title=Copeia&rft.issn=00458511&rft_id=info:doi/10.1043%2F0045-8511%282002%29002%280511%3AEOHTFL%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=0045-8511&volume=2002&page=511 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1043/0045-8511(2002)002(0511:EOHTFL)2.0.CO;2 ER - TY - JOUR T1 - The lacustrine carbon cycle as illuminated by the waters and sediments of two hydrologically distinct headwater lakes in north-central Minnesota, U.S.A. AN - 18049845; 5418936 JF - Journal of Sedimentary Research Section B: Stratigraphy and Global Studies AU - Dean, W E AU - Schwalb, A AD - U.S. Geological Survey, Box 25046, MS 980 Federal Center, Denver, CO 80225, USA, dean@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 VL - 72 IS - 3 SN - 1073-130X, 1073-130X KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Sediment chemistry KW - Lake Sediments KW - Carbon cycle KW - Stratigraphy KW - Limnology KW - Lake deposits KW - USA, Minnesota KW - Lakes KW - Lacustrine sedimentation KW - Carbon Cycle KW - SW 0850:Lakes KW - Q2 09264:Sediments and sedimentation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18049845?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Sedimentary+Research+Section+B%3A+Stratigraphy+and+Global+Studies&rft.atitle=The+lacustrine+carbon+cycle+as+illuminated+by+the+waters+and+sediments+of+two+hydrologically+distinct+headwater+lakes+in+north-central+Minnesota%2C+U.S.A.&rft.au=Dean%2C+W+E%3BSchwalb%2C+A&rft.aulast=Dean&rft.aufirst=W&rft.date=2002-05-01&rft.volume=72&rft.issue=3&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Journal+of+Sedimentary+Research+Section+B%3A+Stratigraphy+and+Global+Studies&rft.issn=1073130X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Sediment chemistry; Lakes; Stratigraphy; Carbon cycle; Limnology; Lacustrine sedimentation; Lake deposits; Lake Sediments; Carbon Cycle; USA, Minnesota ER - TY - JOUR T1 - Pathways for nitrate release from an alpine watershed: Determination using delta super(15)N and delta super(18)O AN - 16136842; 5445029 AB - Snowpack, snowmelt, precipitation, surface water, and groundwater samples from the Loch Vale watershed in Colorado were analyzed for delta super(15)N and delta super(18)O of nitrate to determine the processes controlling the release of atmospherically deposited nitrogen from alpine and subalpine ecosystems. Although overlap was found between the delta super(15)N sub((NO3)) values for all water types (-4 to +6ppt), the delta super(18)O sub((NO3)) values for surface water and groundwater (+10 to +30ppt) were usually distinct from snowpack, snowmelt, and rainfall values (+40 to +70ppt). During snowmelt, delta super(18)O sub((NO3)) indicated that about half of the nitrate in stream water was the product of microbial nitrification; at other times that amount was greater than half. Springs emerging from talus deposits had high nitrate concentrations and a seasonal pattern in delta super(18)O sub((NO3)) that was similar to the pattern in the streams, indicating that shallow groundwater in talus deposits is a likely source of stream water nitrate. Only a few samples of surface water and groundwater collected during early snowmelt and large summer rain events had isotopic compositions that indicated most of the nitrate came directly from atmospheric deposition with no biological assimilation and release. This study demonstrates the value of the nitrate double-isotope technique for determining nitrogen-cycling processes and sources of nitrate in small, undisturbed watersheds that are enriched with inorganic nitrogen. JF - Water Resources Research AU - Campbell, D H AU - Kendall, C AU - Chang, CCY AU - Silva AU - Tonnessen, KA AD - U.S. Geological Survey, MS 415, P.O. Box 25046, Denver Federal Center, Denver CO 80225-0046, USA, dhcampbe@usgs.gov Y1 - 2002/05// PY - 2002 DA - May 2002 VL - 38 IS - 5 SN - 0043-1397, 0043-1397 KW - USA, Colorado KW - Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts; Aqualine Abstracts KW - Nitrate KW - Isotopes KW - Chemistry of groundwater KW - Melt water KW - Water Pollution Sources KW - Path of Pollutants KW - Cycling Nutrients KW - Surface water KW - Isotope applications KW - Freshwater KW - Watersheds KW - Nutrient cycles KW - Catchment areas KW - Ground water KW - Atmospheric pollution deposition KW - Precipitation chemistry KW - Air Pollution KW - Atmospheric precipitations KW - Nitrates KW - Snow KW - Isotope Studies KW - Precipitation KW - Water pollution KW - Watershed chemistry KW - Alpine KW - USA, Colorado, Loch Vale KW - Air pollution KW - Oxygen isotopes KW - Alpine Regions KW - Nitrification KW - Nitrogen isotopes KW - Groundwater KW - Alpine environments KW - Water quality (Natural waters) KW - Snowmelt water pollution KW - Chemistry of runoff KW - Q5 08503:Characteristics, behavior and fate KW - P 2000:FRESHWATER POLLUTION KW - M2 556.11:Water properties (556.11) KW - SW 3020:Sources and fate of pollution KW - Q2 09183:Physics and chemistry KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16136842?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=Pathways+for+nitrate+release+from+an+alpine+watershed%3A+Determination+using+delta+super%2815%29N+and+delta+super%2818%29O&rft.au=Campbell%2C+D+H%3BKendall%2C+C%3BChang%2C+CCY%3BSilva%3BTonnessen%2C+KA&rft.aulast=Campbell&rft.aufirst=D&rft.date=2002-05-01&rft.volume=38&rft.issue=5&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2001WR000294 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Atmospheric precipitations; Oxygen isotopes; Melt water; Nitrates; Surface water; Snow; Ground water; Nitrogen isotopes; Watersheds; Nutrient cycles; Chemistry of groundwater; Isotope applications; Atmospheric pollution deposition; Precipitation chemistry; Snowmelt water pollution; Watershed chemistry; Water pollution; Chemistry of runoff; Air pollution; Alpine environments; Nitrate; Isotopes; Catchment areas; Water quality (Natural waters); Alpine; Air Pollution; Alpine Regions; Nitrification; Cycling Nutrients; Path of Pollutants; Water Pollution Sources; Precipitation; Isotope Studies; Groundwater; USA, Colorado, Loch Vale; Freshwater DO - http://dx.doi.org/10.1029/2001WR000294 ER - TY - JOUR T1 - An evaluation of biomarkers of reproductive function and potential contaminant effects in Florida largemouth bass (Micropterus salmoides floridanus) sampled from the St. Johns River AN - 16134251; 5394573 AB - The objective of this study was to describe and compare several reproductive parameters for Florida largemouth bass (Micropterus salmoides floridanus) inhabiting the St. Johns River and exposed to different types and/or degrees of contamination. Welaka was selected as the reference site in this study because of its low urban and agricultural development, Palatka is in close proximity to a paper mill plant, the Green Cove site is influenced by marine shipping activities and Julington Creek site receives discharges of domestic wastewater and storm water runoff from recreational boating marinas. For this study, bass were sampled both prior to (September 1996) and during the spawning season (February 1997). In order to characterize chemical exposure, bass livers were analyzed for up to 90 trace organics and 11 trace metal contaminants. Reproductive parameters measured included gonadosomatic index (GSI), histological evaluation of gonads and plasma concentrations of vitellogenin (VTG), 17 beta -estradiol (E sub(2)) and 11-ketotestosterone (11-KT). In general, the sum of organic chemicals was highest in livers from Palatka bass and bass from Green Cove and Julington Creek had higher hepatic concentrations of low molecular polycyclic aromatic hydrocarbons and polychlorinated biphenyls when compared to fish from Welaka. Metals were more variable across sites, with highest mean concentrations found in bass from either Julington Creek (Ag, As, Cr, Cu, Zn) or Welaka (Cd, Hg, Pb, Se, Tn). Female bass from Palatka and Green Cove had lower concentrations of E sub(2), VTG and lower GSI in relation to Welaka. Males from Palatka and Green Cove showed comparable declines in 11-KT in relation to males from Julington Creek and GSI were decreased only in Palatka males. These results indicate a geographical trend in reproductive effects, with changes being most pronounced at the site closest to the paper mill (Palatka) and decreasing as the St. Johns River flows downstream. Since reproductive alterations were most evident in bass sampled from the site closest to the paper mill discharge, it is possible that exposure to these effluents might explain at least some of the results reported here. However, the presence of reproductive alterations in fish sampled at a considerable distance from the mill discharge (Green Cove, 40 km) would suggest exposure to chemicals released from sources other than the paper mill plant. It is clear that additional studies are needed to evaluate the potential impact of these reproductive changes in populations of Florida largemouth bass inhabiting the St. Johns River. JF - Science of the Total Environment AU - Sepulveda AU - Johnson, W E AU - Higman, J C AU - Denslow, N D AU - Schoeb, T R AU - Gross, T S AD - Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, 32610, USA, sepulveda@usgs.gov Y1 - 2002/04/22/ PY - 2002 DA - 2002 Apr 22 SP - 133 EP - 144 VL - 289 IS - 1-3 SN - 0048-9697, 0048-9697 KW - Aqualine Abstracts; Water Resources Abstracts; ASFA Aquaculture Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Toxicology Abstracts; Pollution Abstracts KW - Heavy metals KW - Pollution effects KW - Biomarkers KW - Freshwater KW - Freshwater fish KW - Streams KW - Paper industry wastes KW - Bass KW - Paper mills KW - Pollutants KW - Exposure KW - Pulp and Paper Industry KW - USA, Florida, St. Johns R. KW - PCB compounds KW - Rivers KW - Bioindicators KW - Micropterus salmoides floridanus KW - Polycyclic aromatic hydrocarbons KW - Industrial effluents KW - Agrochemicals KW - Water pollution KW - Chlorinated hydrocarbons KW - Bioaccumulation KW - Liver KW - Wastewater discharges KW - Urban Runoff KW - Fish KW - Reproduction KW - Waste water KW - SW 3040:Wastewater treatment processes KW - AQ 00006:Sewage KW - P 2000:FRESHWATER POLLUTION KW - X 24156:Environmental impact KW - Q5 08504:Effects on organisms KW - Q3 08582:Fish culture KW - Q1 08605:Sport fishing UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16134251?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Science+of+the+Total+Environment&rft.atitle=An+evaluation+of+biomarkers+of+reproductive+function+and+potential+contaminant+effects+in+Florida+largemouth+bass+%28Micropterus+salmoides+floridanus%29+sampled+from+the+St.+Johns+River&rft.au=Sepulveda%3BJohnson%2C+W+E%3BHigman%2C+J+C%3BDenslow%2C+N+D%3BSchoeb%2C+T+R%3BGross%2C+T+S&rft.aulast=Sepulveda&rft.aufirst=&rft.date=2002-04-22&rft.volume=289&rft.issue=1-3&rft.spage=133&rft.isbn=&rft.btitle=&rft.title=Science+of+the+Total+Environment&rft.issn=00489697&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-10-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Bioaccumulation; Heavy metals; Pollution effects; Reproduction; Biomarkers; Chlorinated hydrocarbons; Paper mills; Industrial effluents; Waste water; Agrochemicals; Water pollution; Bioindicators; Rivers; Polycyclic aromatic hydrocarbons; Wastewater discharges; Freshwater fish; Paper industry wastes; PCB compounds; Pollutants; Exposure; Pulp and Paper Industry; Liver; Fish; Urban Runoff; Streams; Bass; Micropterus salmoides floridanus; USA, Florida, St. Johns R.; Freshwater ER - TY - JOUR T1 - A comparison of models for estimating the riverine export of nitrogen from large watersheds AN - 755139672; 13660545 AB - We evaluated the accuracy of six watershed models of nitrogen export in streams (kg km super(2) yr super(-1)) developed for use in large watersheds and representing various empirical and quasi-empirical approaches described in the literature. These models differ in their methods of calibration and have varying levels of spatial resolution and process complexity, which potentially affect the accuracy (bias and precision) of the model predictions of nitrogen export and source contributions to export. Using stream monitoring data and detailed estimates of the natural and cultural sources of nitrogen for 16 watersheds in the northeastern United States (drainage sizes = 475 to 70,000 km super(2)), we assessed the accuracy of the model predictions of total nitrogen and nitrate-nitrogen export. The model validation included the use of an error modeling technique to identify biases caused by model deficiencies in quantifying nitrogen sources and biogeochemical processes affecting the transport of nitrogen in watersheds. Most models predicted stream nitrogen export to within 50% of the measured export in a majority of the watersheds. Prediction errors were negatively correlated with cultivated land area, indicating that the watershed models tended to over predict export in less agricultural and more forested watersheds and under predict in more agricultural basins. The magnitude of these biases differed appreciably among the models. Those models having more detailed descriptions of nitrogen sources, land and water attenuation of nitrogen, and water flow paths were found to have considerably lower bias and higher precision in their predictions of nitrogen export. JF - Biogeochemistry AU - Alexander, Richard B AU - Johnes, Penny J AU - Boyer, Elizabeth W AU - Smith, Richard A AD - U.S. Geological Survey, 413 National Center, 12201 Sunrise Valley Drive, Reston, Virginia, 20192, U.S.A., ralex@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 295 EP - 339 PB - Springer-Verlag, Tiergartenstrasse 17 Heidelberg 69121 Germany VL - 57-58 IS - 1 SN - 0168-2563, 0168-2563 KW - Meteorological & Geoastrophysical Abstracts; Pollution Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 2: Ocean Technology Policy & Non-Living Resources; Water Resources Abstracts KW - Prediction KW - Basins KW - Freshwater KW - Watersheds KW - Streams KW - Comparative studies KW - Nitrogen in watersheds KW - Stream Pollution KW - Transport processes KW - Modelling KW - Rivers KW - exports KW - Nitrogen sources KW - Biogeochemistry KW - Biogeochemical cycle KW - Drainage KW - nitrogen sources KW - Errors KW - Export KW - Model Studies KW - Stream flow KW - USA KW - Precision KW - water flow KW - culture KW - Nitrogen KW - M2 556.53:Rivers, Streams, Canals (556.53) KW - Q1 08482:Ecosystems and energetics KW - P 2000:FRESHWATER POLLUTION KW - SW 0835:Streamflow and runoff KW - Q2 09222:Methods and instruments UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/755139672?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Apollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Biogeochemistry&rft.atitle=A+comparison+of+models+for+estimating+the+riverine+export+of+nitrogen+from+large+watersheds&rft.au=Alexander%2C+Richard+B%3BJohnes%2C+Penny+J%3BBoyer%2C+Elizabeth+W%3BSmith%2C+Richard+A&rft.aulast=Alexander&rft.aufirst=Richard&rft.date=2002-04-01&rft.volume=57-58&rft.issue=1&rft.spage=295&rft.isbn=&rft.btitle=&rft.title=Biogeochemistry&rft.issn=01682563&rft_id=info:doi/10.1023%2FA%3A1015752801818 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2010-09-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Rivers; Comparative studies; Biogeochemical cycle; Biogeochemistry; Transport processes; Watersheds; Modelling; Stream flow; Nitrogen; Nitrogen sources; Drainage; Nitrogen in watersheds; exports; water flow; Basins; nitrogen sources; Streams; culture; Prediction; Precision; Stream Pollution; Errors; Export; Model Studies; USA; Freshwater DO - http://dx.doi.org/10.1023/A:1015752801818 ER - TY - JOUR T1 - Role of selenium toxicity and oxidative stress in aquatic birds. AN - 71497636; 11879935 AB - Adverse effects of selenium (Se) in wild aquatic birds have been documented as a consequence of pollution of the aquatic environment by subsurface agricultural drainwater and other sources. These effects include mortality, impaired reproduction with teratogenesis, reduced growth, histopathological lesions and alterations in hepatic glutathione metabolism. A review is provided, relating adverse biological effects of Se in aquatic birds to altered glutathione metabolism and oxidative stress. Laboratory studies, mainly with an organic form of Se, selenomethionine, have revealed oxidative stress in different stages of the mallard (Anas platyrhynchos) life cycle. As dietary and tissue concentrations of Se increase, increases in plasma and hepatic GSH peroxidase activities occur, followed by dose-dependent increases in the ratio of hepatic oxidized to reduced glutathione (GSSG:GSH) and ultimately hepatic lipid peroxidation measured as an increase in thiobarbituric acid reactive substances (TBARS). One or more of these oxidative effects were associated with teratogenesis (4.6 ppm wet weight Se in eggs), reduced growth in ducklings (15 ppm Se in liver), diminished immune function (5 ppm Se in liver) and histopathological lesions (29 ppm Se in liver) in adults. Manifestations of Se-related effects on glutathione metabolism were also apparent in field studies in seven species of aquatic birds. Reduced growth and possibly immune function but increased liver:body weight and hepatic GSSG:GSH ratios were apparent in american avocet (Recurvirostra americana) hatchlings from eggs containing 9 ppm Se. In black-necked stilts (Himantopus mexicanus), which contained somewhat lower Se concentrations, a decrease in hepatic GSH was apparent with few other effects. In adult American coots (Fulica americana), signs of Se toxicosis included emaciation, abnormal feather loss and histopathological lesions. Mean liver concentrations of 28 ppm Se (ww) in the coots were associated with elevated hepatic GSH peroxidase, depletion of hepatic protein bound thiols and total thiols, but a small increase in GSH. Diving ducks in the San Francisco Bay area exhibited a positive correlation between hepatic Se concentration and GSH peroxidase activity (r=0.63, P<0.05), but a negative correlation between hepatic Se and GSH concentration (r=-0.740, P<0.05). In willets (Catoptrophorus semipalmatus) from the San Diego area, positive correlations occurred between hepatic Se concentration and GSSG (r=0.70, P<0.001), GSSG:GSH ratio, and TBARS. In emperor geese (Chen canagica) from western Alaska, blood levels of up to 9.4 ppm occurred and were associated with increased plasma GSH peroxidase activity (r=0.62, P<0.001), but with decreased plasma GSSG reductase activity. When evaluating Se toxicity, interactive nutritional factors, including other elements and dietary protein, should also be taken into consideration. Further studies are needed to examine the relationship between different forms of environmentally occurring selenium, arsenic and mercury on reproduction, hepatotoxicity and immune function of aquatic birds. Further selenium nutritional interaction studies may also help to illucidate the mechanism of selenium induced teratogenesis, by optimizing GSH and other antioxidant defense mechanisms in a manner that would stabilize or raise the cell's threshold for susceptibility to toxic attack from excess selenium. It is concluded that Se-related manifestations of oxidative stress may serve as useful bioindicators of Se exposure and toxicity in wild aquatic birds. JF - Aquatic toxicology (Amsterdam, Netherlands) AU - Hoffman, David J AD - USGS Patuxent Wildlife Research Center, 12011 Beech Forest Road, Laurel, MD 20708-4041, USA. david_hoffman@usgs.gov Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 11 EP - 26 VL - 57 IS - 1-2 SN - 0166-445X, 0166-445X KW - Antioxidants KW - 0 KW - Lipid Peroxides KW - Thiobarbituric Acid Reactive Substances KW - Water Pollutants, Chemical KW - Selenomethionine KW - 964MRK2PEL KW - Glutathione KW - GAN16C9B8O KW - Selenium KW - H6241UJ22B KW - Index Medicus KW - Animals KW - Lipid Peroxides -- biosynthesis KW - Selenomethionine -- toxicity KW - Selenomethionine -- administration & dosage KW - Thiobarbituric Acid Reactive Substances -- analysis KW - Liver -- chemistry KW - Ducks -- metabolism KW - Ducks -- physiology KW - Birds -- metabolism KW - Selenium -- toxicity KW - Reproduction -- drug effects KW - Water Pollutants, Chemical -- toxicity KW - Glutathione -- metabolism KW - Antioxidants -- toxicity KW - Oxidative Stress -- drug effects KW - Selenium -- administration & dosage KW - Birds -- physiology KW - Antioxidants -- administration & dosage UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71497636?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.atitle=Role+of+selenium+toxicity+and+oxidative+stress+in+aquatic+birds.&rft.au=Hoffman%2C+David+J&rft.aulast=Hoffman&rft.aufirst=David&rft.date=2002-04-01&rft.volume=57&rft.issue=1-2&rft.spage=11&rft.isbn=&rft.btitle=&rft.title=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.issn=0166445X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-02 N1 - Date created - 2002-03-06 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Rationale for a tissue-based selenium criterion for aquatic life. AN - 71493818; 11879940 AB - This paper proposes a national tissue-based criterion for the protection of aquatic life in the United States based on the growing body of selenium literature, but may be of international importance due to the raising global awareness of selenium contamination. A recent peer consultation workshop was undertaken by the US Environmental Protection Agency to address the technical issues underlying the freshwater aquatic life chronic criterion for selenium. The workshop participants discussed concerns associated with three possibilities for a new criterion: a water-based criterion, a tissue-based criterion, and a sediment-based criterion. Since the current national water quality criterion was established in 1987, several publications have reported adverse effects in fish from dietary selenium exposure with waterborne concentrations below the current criterion of 5 microg/l. Based on this literature, a water-based criterion seems unsuitable because of the propensity for selenium to bioaccumulate through the food chain to toxic dietary concentrations. There is little information to support a sediment-based criterion. A tissue-based criterion accounts for selenium's biogeochemical pathways because it integrates the route, duration, and magnitude of exposure, chemical form, metabolic transformations, and modifying biotic and abiotic factors. The convergence of laboratory and field data shows 4 microg/g to be a conservative value for a national tissue-based criterion for selenium. JF - Aquatic toxicology (Amsterdam, Netherlands) AU - Hamilton, Steven J AD - Field Research Station, Biological Resources Division, Columbia Environmental Research Center, US Geological Survey, 31247 436th Avenue, Yankton, SD57078-6364, USA. steve_hamilton@usgs.gov Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 85 EP - 100 VL - 57 IS - 1-2 SN - 0166-445X, 0166-445X KW - Antioxidants KW - 0 KW - Water Pollutants, Chemical KW - Selenium KW - H6241UJ22B KW - Index Medicus KW - United States KW - Animals KW - United States Environmental Protection Agency KW - Fresh Water KW - Antioxidants -- analysis KW - Selenium -- analysis KW - Geologic Sediments -- chemistry KW - Water Pollutants, Chemical -- analysis KW - Geologic Sediments -- analysis KW - Fishes -- metabolism UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71493818?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.atitle=Rationale+for+a+tissue-based+selenium+criterion+for+aquatic+life.&rft.au=Hamilton%2C+Steven+J&rft.aulast=Hamilton&rft.aufirst=Steven&rft.date=2002-04-01&rft.volume=57&rft.issue=1-2&rft.spage=85&rft.isbn=&rft.btitle=&rft.title=Aquatic+toxicology+%28Amsterdam%2C+Netherlands%29&rft.issn=0166445X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-02 N1 - Date created - 2002-03-06 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Rockfall and landslide hazards of the canyons of the upper Virgin River basin near Rockville and Springdale, Utah AN - 52098484; 2002-049087 AB - The spectacular beauty of the steep canyons of the upper Virgin River basin is famous because of Zion National Park. But the same geologic and topographic conditions that make the area beautiful also make it highly susceptible to two widely different types of hazards: rockfalls and landslides. This was dramatically emphasized on October 18, 2001, when a one-story home in Rockville was struck by a 200-300 ton boulder. The homeowner escaped within inches and seconds from injury! A cliff of the Shinarump Conglomerate Member of the Upper Triassic Chinle Formation gave way, and the resulting slab fell vertically, hit the slope at the cliff base, and shattered into several pieces, one of which bounced over a stone wall into the home. Its source was Rockville Bench, towering about 65 m above the valley floor. Four sets of joints, at about 45 degrees to each other, cut the rocks, but the primary control was the through-going N. 40 W. set, which paralleled the Bench face. Similar hazards between Rockville and the entrance of Zion Canyon 8 km to the NE include: (1) large angular rocks, many of which have moved historically, littering slopes of the incompetent Moenkopi Formation below the Shinarump; (2) Springdale is bounded on its NW and SE sides by landslides, including one of 14 million cubic meters that destroyed 3 homes on September 2, 1992, and another that moved in May 1988; and (3) a slide of 84,000 cubic meters in Zion Canyon that blocked the canyon, stranded tourists, and dammed the Virgin River on April 12, 1995, only the latest of many historic (1923, 1941) and Quaternary landslides and landslide lakes there. The causes of these continually moving mantles of debris are a gypsiferous and bentonitic lower Mesozoic sedimentary section, rapid downcutting in a semi-arid environment, and flat-lying alternating massive sandstones and incompetent shales. As development continues, increasing numbers of people are placed in danger. JF - Abstracts with Programs - Geological Society of America AU - Rowley, Peter D AU - Hamilton, Wayne L AU - Lund, William R AU - Sharrow, David AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 50 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - rockfalls KW - geologic hazards KW - Virgin River basin KW - damage KW - joints KW - Springdale Utah KW - debris flows KW - Rockville Utah KW - landslides KW - fractures KW - style KW - Washington County Utah KW - mass movements KW - risk assessment KW - Utah KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52098484?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Rockfall+and+landslide+hazards+of+the+canyons+of+the+upper+Virgin+River+basin+near+Rockville+and+Springdale%2C+Utah&rft.au=Rowley%2C+Peter+D%3BHamilton%2C+Wayne+L%3BLund%2C+William+R%3BSharrow%2C+David%3BAnonymous&rft.aulast=Rowley&rft.aufirst=Peter&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=50&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - damage; debris flows; fractures; geologic hazards; joints; landslides; mass movements; risk assessment; rockfalls; Rockville Utah; Springdale Utah; style; United States; Utah; Virgin River basin; Washington County Utah ER - TY - JOUR T1 - Middle Jurassic dinosaur community dynamics in northern Wyoming; theropod family values AN - 52098406; 2002-049073 AB - Although evidence of gregarious theropods is relatively rare, extensive, state-of-the-art vertebrate ichnology studies at the Red Gulch Dinosaur Tracksite (RGDT) provide exciting insights into the behavioral complexities of a unique Middle Jurassic dinosaur community. In the eastern Bighorn Basin of Wyoming, thousands of tridactyl pes impressions are preserved in a ripple-bedded, oolitic, limestone of the Canyon Springs Member of the Lower Sundance Formation. At the RGDT (UW V-98066), the activity patterns of over 100 small- medium-sized carnivorous dinosaurs (ranging in hip height from approximately 32-120 cm) are preserved. Irregular step lengths, variable straddle widths, and swerving, parallel trackway paths may relate to variations in substrate microenvironments, tidal cycles, and intracommunity dynamics. In addition, dramatic differences in track morphology both within and between scores of distinct trackways (ranging from 2 to 45 steps) may reflect lateral and vertical substrate variations, differential preservation and weathering, variable track generation episodes, ontogenetic variability, and individual trackmaker characteristics. Multivariate analysis of the ichnology data supports interpretations about the family structure and community dynamics of gregarious dinosaurs walking (and perhaps foraging) in the water-saturated sediments close to the shore of the Sundance Sea. The evidence of family groups of these primitive tetanurine theropods (possibly ranging in age from yearling to adult) implies proximity to a nesting area and the altricial nature of young dinosaurs. Interpretations of the intricate "dance" of these organisms on an ancient tidal flat is fascinating as a "live-action" glimpse of the past becomes clearer through continual, intensive research. The exhaustive documentation of the RGDT (one of the most thoroughly documented dinosaur tracksites in the world) has led to our understanding of the behaviors and family structures of carnivorous dinosaurs on the tidally influenced shores of the Western Interior of North America approximately 165 million years ago. JF - Abstracts with Programs - Geological Society of America AU - Breithaupt, Brent H AU - Southwell, Elizabeth H AU - Adams, Thomas L AU - Matthews, Neffra A AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 48 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Diapsida KW - behavior KW - ichnofossils KW - Archosauria KW - Theropoda KW - northern Wyoming KW - dinosaurs KW - juvenile taxa KW - Chordata KW - Jurassic KW - biostratigraphy KW - tracks KW - Middle Jurassic KW - distribution KW - Mesozoic KW - Reptilia KW - morphology KW - Wyoming KW - paleoenvironment KW - functional morphology KW - Saurischia KW - Vertebrata KW - Tetrapoda KW - Red Gulch Dinosaur Tracksite KW - carnivorous taxa KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52098406?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Middle+Jurassic+dinosaur+community+dynamics+in+northern+Wyoming%3B+theropod+family+values&rft.au=Breithaupt%2C+Brent+H%3BSouthwell%2C+Elizabeth+H%3BAdams%2C+Thomas+L%3BMatthews%2C+Neffra+A%3BAnonymous&rft.aulast=Breithaupt&rft.aufirst=Brent&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=48&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Archosauria; behavior; biostratigraphy; carnivorous taxa; Chordata; Diapsida; dinosaurs; distribution; functional morphology; ichnofossils; Jurassic; juvenile taxa; Mesozoic; Middle Jurassic; morphology; northern Wyoming; paleoenvironment; Red Gulch Dinosaur Tracksite; Reptilia; Saurischia; Tetrapoda; Theropoda; tracks; United States; Vertebrata; Wyoming ER - TY - JOUR T1 - Hydrogeologic evidence for ground-water discharge from the regional carbonate-rock aquifer system to the Colorado River, southeastern Nevada AN - 52094855; 2002-049139 AB - A vast regional Paleozoic carbonate-rock aquifer system has been identified in the Great Basin region in Nevada and adjacent States, which extends from the Great Salt Lake on the northeast to Death Valley on the southwest. Major ground-water flow systems identified within the carbonate-rock aquifer system include the Great Salt Lake system in the northeast, the Death Valley system in the southwest, and the Colorado system in the southeast. Recharge to the carbonate-rock aquifer system occurs principally in mountainous areas in east-central Nevada. Ground-water moves in fractures and enhanced solutioned openings, principally northeastward and southward from this area of principal recharge. Discharge occurs principally to large-volume springs, to evapotranspiration, to base-flow to streams in places, and perhaps to regional ground-water flow directly to the regional sinks at the Great Salt Lake, Death Valley salt pan, and Lake Mead on the Colorado River. The water balance for the lower Colorado ground-water flow system has been the subject of scrutiny in recent years, due to efforts to ensure sustainable ground-water development in the regional carbonate-rock aquifer northeast of Las Vegas in response to rapid population growth in the area. Empirical methods have been used to estimate the distribution of ground-water recharge within the regional ground-water flow system, by apportioning measured regional ground-water discharge. Recently, revised empirical methods have been used to estimate regional ground-water recharge from newer estimates of precipitation and evapotranspiration. Then, undiscovered regional discharge has been estimated based on the difference between these new, larger recharge estimates and measured discharge. JF - Abstracts with Programs - Geological Society of America AU - Van Liew, William P AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 58 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - hydrology KW - water balance KW - ground water KW - aquifers KW - Colorado River KW - recharge KW - sedimentary rocks KW - southeastern Nevada KW - discharge KW - carbonate rocks KW - Nevada KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52094855?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Hydrogeologic+evidence+for+ground-water+discharge+from+the+regional+carbonate-rock+aquifer+system+to+the+Colorado+River%2C+southeastern+Nevada&rft.au=Van+Liew%2C+William+P%3BAnonymous&rft.aulast=Van+Liew&rft.aufirst=William&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=58&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - aquifers; carbonate rocks; Colorado River; discharge; ground water; hydrology; Nevada; recharge; sedimentary rocks; southeastern Nevada; United States; water balance ER - TY - JOUR T1 - Evidence for a regional source of discharge at Rogers Spring, Lake Mead National Recreation Area, Nevada AN - 52092663; 2002-049140 AB - The source of water for large regional springs in southern Nevada has been well documented by numerous investigators. Regional springs in Nevada have been characterized on the basis of geochemical data and discharge characteristics. For example, spring discharge at the Ash Meadows National Wildlife Refuge west of Las Vegas and the Moapa Valley National Wildlife Refuge northeast of Las Vegas is dependent on groundwater discharge from the regional carbonate-rock aquifer of the Basin and Range physiographic province. However, the source of water for springs in the Lake Mead National Recreation Area is not as well documented because of complex local geology and limited hydrogeologic information. In this study, analysis of discharge data collected at Rogers Spring, the largest spring in the Lake Mead National Recreation Area, and precipitation data from a nearby weather station, suggest that the spring's source may be a mixture of recharge occurring within the drainage area, and recharge from areas outside the hydrographic basin. Temperature and isotopic and geochemical data provide further evidence for a regional source of discharge at Rogers Spring. JF - Abstracts with Programs - Geological Society of America AU - Back, Jennifer AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 58 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Rogers Spring KW - hydrology KW - Lake Mead National Recreation Area KW - Lake Mead KW - springs KW - discharge KW - geochemistry KW - Nevada KW - 21:Hydrogeology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52092663?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Evidence+for+a+regional+source+of+discharge+at+Rogers+Spring%2C+Lake+Mead+National+Recreation+Area%2C+Nevada&rft.au=Back%2C+Jennifer%3BAnonymous&rft.aulast=Back&rft.aufirst=Jennifer&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=58&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2002-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - discharge; geochemistry; hydrology; Lake Mead; Lake Mead National Recreation Area; Nevada; Rogers Spring; springs; United States ER - TY - JOUR T1 - Middle school volcanology curriculum that links to traditional Hawaiian stories AN - 52021906; 2003-019246 AB - For the last 10 years, we have been developing new curriculum and programs that link traditional native Hawaiian stories to recent volcanic history of Hawai'i. We incorporate native cultural values, traditions, and language while teaching students the physics and mathematics of volcanoes. We have field-tested our curriculum during several two-week summer programs for native Hawaiian middle school students with the Na Pua No'eau Gifted and Talented Program at University of Hawai'i Hilo. During these summer programs, instruction is primarily in the form of short talks and question-and-answer sessions during a daylong hike, each day of the program. Emphasis is on interpreting outcrops and volcanic features with many hand-on examples. The daily goal is to be able to tell a geologic story about that area. We are also working with the Hawai'i Alive curriculum project administered by the University of Alaska at Fairbanks and Alu Like, Inc. The Hawai'i Alive project plans to produce an educational CD-ROM with classroom lessons in both English and Hawaiian that will be distributed throughout Hawai'i. Our goal is to improve native Hawaiian students' self-concept by acknowledging Hawaiian stories that describe actual events, natural processes, and hazards. These stories were generally based on actual observations, and the observers were the cultural equivalent of scientists today. Observations were made to insure survival and safety when travelling to dangerous areas on the volcano. For example, stories of Pele-honua-mea, the Hawaiian goddess of volcanoes, give astute descriptions of the noises produced during an eruption, lava movements, and textures of the cooled rocks. Students are introduced to scientific geological concepts as parallel but testable explanations of the same events, processes, and hazards. This serves the additional goal of teaching the scientific method contrasted with anecdotal methods used in most stories and legends. Park visitors also gain from these programs, which will be shared with the general public after being field-tested with students. JF - Abstracts with Programs - Geological Society of America AU - Reveira, Leianuenue AU - Kauahikaua, Jim AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 20 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 5 SN - 0016-7592, 0016-7592 KW - United States KW - national parks KW - Hawaii KW - East Pacific Ocean Islands KW - junior high school KW - education KW - public lands KW - volcanology KW - history KW - educational resources KW - K-12 education KW - volcanism KW - Oceania KW - curricula KW - volcanoes KW - Polynesia KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/52021906?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Middle+school+volcanology+curriculum+that+links+to+traditional+Hawaiian+stories&rft.au=Reveira%2C+Leianuenue%3BKauahikaua%2C+Jim%3BAnonymous&rft.aulast=Reveira&rft.aufirst=Leianuenue&rft.date=2002-04-01&rft.volume=34&rft.issue=5&rft.spage=20&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Cordilleran Section, 98th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - curricula; East Pacific Ocean Islands; education; educational resources; Hawaii; history; junior high school; K-12 education; national parks; Oceania; Polynesia; public lands; United States; volcanism; volcanoes; volcanology ER - TY - JOUR T1 - Share the adventure! Discovering dinosaurs; electronic fieldtrip to Grand Staircase-Escalante National Monument, a Bureau of Land Management and Museum of Northern Arizona partnership AN - 51984263; 2003-041349 AB - The exposure of an articulated tail of a duckbill dinosaur in 2000 in Grand Staircase-Escalante National Monument (GSENM) by the Museum of Northern Arizona led to a remarkable opportunity for public education. The tail skeleton included ossified tendons and associated bones, in high-quality preservation. The site was in the Kaiparowits Plateau, a picturesque high-elevation desert presently designated as a Wilderness Study Area. The Bureau of Land Management and Museum of Northern Arizona developed this pilot project for environmental education through a website that covered the progress of the excavation, on-site videography that documented the excavation, preparation of an educator's guide for teachers in grades 5-9, and production of a interactive, live broadcast to classrooms via satellite. Learning objectives included (1) the process of scientific inquiry and how it is used by paleontologists; (2) how fossils form and what we can learn from them; (3) scientific values of GSENM and other protected areas on public lands; (4) actions that individuals can take to protect scientific resources on public lands; and (5) the notion that we all participate in ownership of America's public lands. During the excavation, paleontologists found skin impressions of this dinosaur's tail, a rare and exciting discovery that was covered as it happened by the videography. The broadcast and educator's guide sought to meet National Science Education Standards for grades 5-9: Standard A, Science as Inquiry; Standard C, Life Science, biological evolution, diversity and adaptations of organisms; Standard D, Earth and Space Science, structure of the Earth system, Earth's history, origin and evolution of the Earth system; and Standard G, History and Nature of Science, science as a human endeavor. The two one-hour broadcasts attracted classrooms from across the North American continent, from Florida to Alaska. JF - Abstracts with Programs - Geological Society of America AU - Titus, Alan L AU - Gillette, David D AU - Albright, L Barry, III AU - Rieben, Elizabeth T AU - Sharrow, Barbara AU - Wooster, Elizabeth S AU - Ferraro, Art AU - Tisdale, Mary E AU - Bryant, Laurie AU - Eaton, Marietta AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 15 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Chordata KW - field trips KW - education KW - satellite methods KW - Reptilia KW - geology KW - K-12 education KW - Grand Staircase-Escalante National Monument KW - curricula KW - dinosaurs KW - Utah KW - Vertebrata KW - Tetrapoda KW - remote sensing KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51984263?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Share+the+adventure%21+Discovering+dinosaurs%3B+electronic+fieldtrip+to+Grand+Staircase-Escalante+National+Monument%2C+a+Bureau+of+Land+Management+and+Museum+of+Northern+Arizona+partnership&rft.au=Titus%2C+Alan+L%3BGillette%2C+David+D%3BAlbright%2C+L+Barry%2C+III%3BRieben%2C+Elizabeth+T%3BSharrow%2C+Barbara%3BWooster%2C+Elizabeth+S%3BFerraro%2C+Art%3BTisdale%2C+Mary+E%3BBryant%2C+Laurie%3BEaton%2C+Marietta%3BAnonymous&rft.aulast=Titus&rft.aufirst=Alan&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=15&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Chordata; curricula; dinosaurs; education; field trips; geology; Grand Staircase-Escalante National Monument; K-12 education; remote sensing; Reptilia; satellite methods; Tetrapoda; United States; Utah; Vertebrata ER - TY - JOUR T1 - New records of vertebrates from the Late Cretaceous Tropic Shale of southern Utah AN - 51981799; 2003-041289 AB - The Tropic Shale is comprised primarily of open marine, clastic-dominated shales that crop out in central southern Utah. These deposits lie stratigraphically between the underlying Dakota Formation and overlying Straight Cliffs Formation and are equivalent to the well studied portion of the Mancos Shale exposed at Black Mesa, AZ, about 100 km southeast of our study area. The Tropic Shale was deposited along the western margin of the Cretaceous Interior Seaway, and it spans the late Cenomanian Sciponoceras gracile NA ammonite zone through the mid-Turonian Prionocyclis hyatti Zone. Although the invertebrate megafauna of the Tropic Shale has been studied in detail, particularly in terms of ammonite and inoceramid biostratigraphy, the vertebrate fauna has not been given similar attention. This lack of attention is due primarily to what heretofore has been perceived as a near absence of vertebrates in the unit (with the exception of chondrichthyans), and because studies of vertebrates have focused more on the terrestrial units lying above and below the marine shales. Non-fish vertebrates previously reported from the Tropic Shale are limited to one series of associated plesiosaur vertebrae, other isolated plesiosaur elements, and a marine turtle recovered from equivalent exposures at Black Mesa. Our recent work has significantly altered the perception that the Tropic Shale preserves few vertebrates, and indicates that this unit has a diverse and important extra-chondrichthyan vertebrate fauna that includes osteichthyans, a variety of plesiosaurs and marine turtles, and even a terrestrial dinosaur. The dinosaur represents one of the first two therizinosaurs ever reported outside of Asia. The detailed biostratigraphic framework previously constructed for the Tropic Shale and the equivalent portion of the Mancos Shale at Black Mesa, together with numerous prominent bentonite and limestone concretion marker beds in the sequence, allows us to place all of our finds in a high resolution chronostratigraphic context. These new finds add significantly to our understanding of the vertebrate fauna of the Cretaceous Interior Seaway during the Cenomanian-Turonian (Greenhorn Cyclothem) interval. JF - Abstracts with Programs - Geological Society of America AU - Albright, L Barry, III AU - Gillette, David D AU - Titus, Alan L AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Diapsida KW - Chordata KW - Cretaceous KW - Straight Cliffs Formation KW - southern Utah KW - Turonian KW - Upper Cretaceous KW - Mesozoic KW - Reptilia KW - Tropic Shale KW - Sauropterygia KW - Plesiosauria KW - Dakota Formation KW - dinosaurs KW - Utah KW - Vertebrata KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51981799?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=New+records+of+vertebrates+from+the+Late+Cretaceous+Tropic+Shale+of+southern+Utah&rft.au=Albright%2C+L+Barry%2C+III%3BGillette%2C+David+D%3BTitus%2C+Alan+L%3BAnonymous&rft.aulast=Albright&rft.aufirst=L&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=5&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Chordata; Cretaceous; Dakota Formation; Diapsida; dinosaurs; Mesozoic; Plesiosauria; Reptilia; Sauropterygia; southern Utah; Straight Cliffs Formation; Tetrapoda; Tropic Shale; Turonian; United States; Upper Cretaceous; Utah; Vertebrata ER - TY - JOUR T1 - Discovery and excavation of a therizinosaurid dinosaur from the Upper Cretaceous Tropic Shale (early Turonian), Kane County, Utah AN - 51981777; 2003-041291 AB - In 2000 and 2001 the Museum of Northern Arizona excavated the partial skeleton of a large therizinosaurid dinosaur from the Upper Cretaceous Tropic Shale, a marine formation that otherwise has not yielded fossils of terrestrial origin. The site is in Kane County, Utah, immediately south of the southern boundary of the Grand Staircase-Escalante National Monument. The skeleton consists of one front limb including most of the manus, complete pelvis, both rear limbs including partial pes, dorsal vertebrae, complete sacrum and sacral vertebrae, and caudal vertebrae. To date, no skull elements or cervical vertebrae have been recognized. The skeleton occurred in open marine sediments in association with ammonoids of the upper Watinoceras coloradoense-lower Mammites nodosoides biozone interval of late early Turonian age. Some elements were compressed by compaction, and the skeleton was slightly disarticulated owing to settling after coming to rest in the soft marine sediments. The manus possesses at least three compressed, oversized ungual phalanges. The characteristically opisthopubic pelvis and tetradactyl pes with blunt ungual phalanges confirm identification as a therizinosaurid dinosaur, but its taxonomic position remains uncertain. It seems to be related to the recently described therizinosaurid dinosaur Nothronychus mckinleyi Kirkland and Wolfe 2001 from the middle Turonian of southwestern New Mexico. Because these two occurrences are separated stratigraphically by at least a million years, they are probably different species, if not different genera. Phylogenetic assessment of the new specimen must await full preparation of the skeleton. JF - Abstracts with Programs - Geological Society of America AU - Gillette, David D AU - Albright, L Barry, III AU - Titus, Alan L AU - Graffam, Merle H AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 5 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Chordata KW - Cretaceous KW - Turonian KW - Upper Cretaceous KW - Therizinosauria KW - Mesozoic KW - Reptilia KW - Tropic Shale KW - Kane County Utah KW - skeletons KW - lower Turonian KW - dinosaurs KW - Utah KW - Vertebrata KW - Tetrapoda KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51981777?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Discovery+and+excavation+of+a+therizinosaurid+dinosaur+from+the+Upper+Cretaceous+Tropic+Shale+%28early+Turonian%29%2C+Kane+County%2C+Utah&rft.au=Gillette%2C+David+D%3BAlbright%2C+L+Barry%2C+III%3BTitus%2C+Alan+L%3BGraffam%2C+Merle+H%3BAnonymous&rft.aulast=Gillette&rft.aufirst=David&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=5&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Chordata; Cretaceous; dinosaurs; Kane County Utah; lower Turonian; Mesozoic; Reptilia; skeletons; Tetrapoda; Therizinosauria; Tropic Shale; Turonian; United States; Upper Cretaceous; Utah; Vertebrata ER - TY - JOUR T1 - Tracking dinosaurs using low-altitude aerial photography at the Twentymile Wash dinosaur tracksite, Grand Staircase Escalante National Monument, Utah AN - 51981470; 2003-041296 AB - The Twentymile Wash Dinosaur Tracksite (TWDT) is located in Grand Staircase-Escalante N.M. approximately 25 km southeast of the town of Escalante, Utah. At this site over 300 dinosaur footprints are preserved in the Middle Jurassic Entrada Sandstone. The main track-bearing horizon crops out at the top of a 400 m-long east/west trending bench and is nearly 2 m thick. Erosion has smoothed this bench so that it gradually slopes to the south, exposing tracks and trackways from multiple levels. Stratigraphically this site is approximately the same as the megatracksite at Moab, Utah. The tridactyl tracks range in length from 15 to 45 cm and are assigned to theropod dinosaurs. In addition, unique sauropod tracks and traces are also known from this site. Track preservation occurs as darker sediment infillings and as light and dark underprinted sand laminations. At least 30 theropod trackways are present that contain from 2 to 30 steps. Due to the number and extent of tracks and trackways, the variable mode of preservation, and the exposure of multiple levels of tracks, the TWDT has a very complex and intriguing story waiting to be unraveled. To aid in unraveling this intriguing story and to preserve the value of this unique paleontological resource, the BLM is utilizing photogrammetry. Aerial photography at a scale of 1:3,000 and 70 mm-format images taken from a low-altitude Camera Blimp System (CBS) are being used to document the site. The CBS consists of a 6 m-long, helium-filled blimp, which is capable of lifting a camera to 76 m above the ground. The onboard camera is positioned from the ground and can be oriented to acquire photographs that are near vertical or oblique to the surface. The aerial photos will be combined with ground control coordinates collected utilizing very precise GPS locations to produce an orthorectified digital photomosaic of the track-bearing surface. This photomosaic will be spatially correct and can be used in a GIS environment to digitize the locations of individual dinosaur tracks at the site. The mosaic can also be used in the field as a base map to collect other information about the tracks and the surface in which they are preserved. This technology will aid the understanding of interactions between dinosaurs and their environment during the Middle Jurassic. JF - Abstracts with Programs - Geological Society of America AU - Matthews, Neffra A AU - Noble, Tom AU - Titus, Alan L AU - Foster, John R AU - Smith, Joshua A AU - Breithaupt, Brent H AU - Kett, Dave AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Chordata KW - Upper Jurassic KW - Jurassic KW - ichnofossils KW - tracks KW - Mesozoic KW - Reptilia KW - Kane County Utah KW - Grand Staircase-Escalante National Monument KW - Twentymile Wash dinosaur tracksite KW - Entrada Sandstone KW - aerial photography KW - dinosaurs KW - Utah KW - Vertebrata KW - Tetrapoda KW - remote sensing KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51981470?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Tracking+dinosaurs+using+low-altitude+aerial+photography+at+the+Twentymile+Wash+dinosaur+tracksite%2C+Grand+Staircase+Escalante+National+Monument%2C+Utah&rft.au=Matthews%2C+Neffra+A%3BNoble%2C+Tom%3BTitus%2C+Alan+L%3BFoster%2C+John+R%3BSmith%2C+Joshua+A%3BBreithaupt%2C+Brent+H%3BKett%2C+Dave%3BAnonymous&rft.aulast=Matthews&rft.aufirst=Neffra&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=6&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - aerial photography; Chordata; dinosaurs; Entrada Sandstone; Grand Staircase-Escalante National Monument; ichnofossils; Jurassic; Kane County Utah; Mesozoic; remote sensing; Reptilia; Tetrapoda; tracks; Twentymile Wash dinosaur tracksite; United States; Upper Jurassic; Utah; Vertebrata ER - TY - JOUR T1 - Skin impressions from the tail of a Hadrosaurian dinosaur in the Kaiparowits Formation (Upper Cretaceous), Grand Staircase-Escalante National Monument AN - 51980336; 2003-041293 AB - During the excavation of the tail of a hadrosaurian dinosaur in 2001, we discovered skin impressions with counterpart casts of the same impressions, preserved in exceptional detail. The skeleton was in a fluvial siltstone bed of the Upper Cretaceous Kaiparowits Formation (Campanian/Maastrichtian Age) in the Grand Staircase-Escalante National Monument (GSENM), Kane County, Utah. The skeleton occurred with limonitic and carbonaceous plant impressions and fragments. The skeleton consists of a nearly complete, articulated tail with chevrons and ossified tendons; and fragmentary sacral vertebrae, dorsal vertebrae, ribs, ilium, and elements of the rear limb including astragalus and femur. Its taxonomic identity is uncertain; we tentatively identify it as a lambeosaurine hadrosaur. The impressions originated from four anatomical positions: dorsal to the last sacral and first caudal vertebrae, dorsal to caudal 10, the lateral surface of the tail beneath caudals 24-28, and in a block of rock from an unknown position but probably from the middle region of the tail. All seem to have originated from the underside (anatomically left side) of the carcass as it lay on its side during burial. The impressions range from diamond-shaped polygons in regular diagonal rows, to irregular 5- and 6-sided polygons in poorly defined rows. Some impressions contain a weakly expressed radial pattern. Their size is remarkably uniform, generally 1-2 cm wide. All impressions appear to indicate edge-to-edge contact, with no indication of overlap or imbrication. In life, the skin of the tail consisted of convex, non-imbricating scales, with no indication of larger tubercles as described for several other hadrosaur skeletons with skin impressions. Genesis of the impressions and counterparts seems to have originated by impression of the external surface of the skin in soft sediments, and decomposition of the skin without destruction of the skin impressions. The majority of previously described dinosaur skin impressions are hadrosaurian. The only other published record of dinosaur skin impressions from the State is a hadrosaur of undetermined identity in the Neslen Formation of east-central Utah. This specimen highlights the potential for the discovery of similarly well-preserved dinosaurs in the Kaiparowits Formation within the GSENM. JF - Abstracts with Programs - Geological Society of America AU - Gillette, David D AU - Albright, L Barry, III AU - Titus, Alan L AU - Graffam, Merle H AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 6 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 4 SN - 0016-7592, 0016-7592 KW - United States KW - Diapsida KW - Kaiparowits Formation KW - tails KW - Cretaceous KW - skin impressions KW - Upper Cretaceous KW - Ornithopoda KW - Archosauria KW - Grand Staircase-Escalante National Monument KW - skeletons KW - dinosaurs KW - Hadrosauridae KW - Chordata KW - tracks KW - Mesozoic KW - Reptilia KW - Kane County Utah KW - soft parts KW - Utah KW - Vertebrata KW - Ornithischia KW - Tetrapoda KW - preservation KW - 11:Vertebrate paleontology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51980336?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Skin+impressions+from+the+tail+of+a+Hadrosaurian+dinosaur+in+the+Kaiparowits+Formation+%28Upper+Cretaceous%29%2C+Grand+Staircase-Escalante+National+Monument&rft.au=Gillette%2C+David+D%3BAlbright%2C+L+Barry%2C+III%3BTitus%2C+Alan+L%3BGraffam%2C+Merle+H%3BAnonymous&rft.aulast=Gillette&rft.aufirst=David&rft.date=2002-04-01&rft.volume=34&rft.issue=4&rft.spage=6&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Rocky Mountain Section, 54th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2003-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Archosauria; Chordata; Cretaceous; Diapsida; dinosaurs; Grand Staircase-Escalante National Monument; Hadrosauridae; Kaiparowits Formation; Kane County Utah; Mesozoic; Ornithischia; Ornithopoda; preservation; Reptilia; skeletons; skin impressions; soft parts; tails; Tetrapoda; tracks; United States; Upper Cretaceous; Utah; Vertebrata ER - TY - JOUR T1 - Responses of an arctic landscape to lateglacial and early Holocene climatic changes; the importance of moisture AN - 51184788; 2002-061729 AB - Many of the physical and biological processes that characterize arctic ecosystems are unique to high latitudes, and their sensitivities to climate change are poorly understood. Stratigraphic records of land-surface processes and vegetation change in the Arctic Foothills of northern Alaska reveal how tundra landscapes responded to climatic changes between 13,000 and 8000 (super 14) C yr BP. Peat deposition began and shrub vegetation became widespread ca. 12,500 (super 14) C yr BP, probably in response to the advent of warmer and wetter climate. Increased slope erosion caused rapid alluviation in valleys, and Populus trees spread northward along braided floodplains before 11,000 (super 14) C yr BP. Lake levels fell and streams incised their floodplains during the Younger Dryas (YD) (11,000-10,000 (super 14) C yr BP). A hiatus in records of Populus suggest that its geographic range contracted, and pollen records of other species suggest a cooler and drier climate during this interval. Basal peats dating to the YD are rare, suggesting that rates of paludification slowed. Immediately after 10,000 (super 14) C yr BP, lake levels rose, streams aggraded rapidly again, intense solifluction occurred, and Populus re-invaded the area. Moist acidic tundra vegetation was widespread by 8500 (super 14) C yr BP along with wet, organic-rich soils. Most of these landscape-scale effects of climatic change involved changes in moisture. Although low temperature is the most conspicuous feature of arctic climate, shifts in effective moisture may be the proximate cause for many of the impacts that climate change has in arctic regions. JF - Quaternary Science Reviews AU - Mann, Daniel H AU - Peteet, Dorothy M AU - Reanier, Richard E AU - Kunz, Michael L Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 997 EP - 1021 PB - Pergamon, Oxford VL - 21 IS - 8-9 SN - 0277-3791, 0277-3791 KW - United States KW - lithostratigraphy KW - Spermatophyta KW - Populus KW - paleoclimatology KW - Holocene KW - climate change KW - upper Pleistocene KW - Cenozoic KW - upper Weichselian KW - pollen KW - Arctic Foothills KW - Weichselian KW - ice KW - arctic environment KW - glacial environment KW - miospores KW - Younger Dryas KW - Plantae KW - Quaternary KW - North Slope KW - biostratigraphy KW - Arctic region KW - Arctic Coastal Plain KW - paleoenvironment KW - palynomorphs KW - Northern Alaska KW - Pleistocene KW - Alaska KW - fluvial environment KW - microfossils KW - Angiospermae KW - meltwater KW - 24:Quaternary geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51184788?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Quaternary+Science+Reviews&rft.atitle=Responses+of+an+arctic+landscape+to+lateglacial+and+early+Holocene+climatic+changes%3B+the+importance+of+moisture&rft.au=Mann%2C+Daniel+H%3BPeteet%2C+Dorothy+M%3BReanier%2C+Richard+E%3BKunz%2C+Michael+L&rft.aulast=Mann&rft.aufirst=Daniel&rft.date=2002-04-01&rft.volume=21&rft.issue=8-9&rft.spage=997&rft.isbn=&rft.btitle=&rft.title=Quaternary+Science+Reviews&rft.issn=02773791&rft_id=info:doi/ L2 - http://www.sciencedirect.com/science/journal/02773791 LA - English DB - GeoRef N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands N1 - Date revised - 2002-01-01 N1 - Number of references - 130 N1 - Document feature - illus. incl. sect., strat. cols., geol. sketch maps N1 - SuppNotes - Includes appendices N1 - Last updated - 2012-06-07 N1 - SubjectsTermNotLitGenreText - Alaska; Angiospermae; Arctic Coastal Plain; arctic environment; Arctic Foothills; Arctic region; biostratigraphy; Cenozoic; climate change; fluvial environment; glacial environment; Holocene; ice; lithostratigraphy; meltwater; microfossils; miospores; North Slope; Northern Alaska; paleoclimatology; paleoenvironment; palynomorphs; Plantae; Pleistocene; pollen; Populus; Quaternary; Spermatophyta; United States; upper Pleistocene; upper Weichselian; Weichselian; Younger Dryas ER - TY - JOUR T1 - Issues in characterizing seismic sources in southwestern Oregon AN - 51144838; 2005-003657 JF - Seismological Research Letters AU - Schapiro, Robyn AU - Wong, I G AU - Dober, M AU - Ake, J AU - Anderson, L AU - Madin, I AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 241 PB - Seismological Society of America, El Cerrito, CA VL - 73 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - southwestern Oregon KW - focal mechanism KW - Quaternary KW - Klamath Falls earthquakes 1993 KW - geologic hazards KW - Modoc Plateau KW - Cenozoic KW - California KW - Oregon KW - tectonics KW - Cascadia subduction zone KW - earthquakes KW - seismotectonics KW - faults KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51144838?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Issues+in+characterizing+seismic+sources+in+southwestern+Oregon&rft.au=Schapiro%2C+Robyn%3BWong%2C+I+G%3BDober%2C+M%3BAke%2C+J%3BAnderson%2C+L%3BMadin%2C+I%3BAnonymous&rft.aulast=Schapiro&rft.aufirst=Robyn&rft.date=2002-04-01&rft.volume=73&rft.issue=2&rft.spage=241&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 97th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2005-01-01 N1 - PubXState - CA N1 - Last updated - 2012-06-07 N1 - CODEN - EAQNAT N1 - SubjectsTermNotLitGenreText - California; Cascadia subduction zone; Cenozoic; earthquakes; faults; focal mechanism; geologic hazards; Klamath Falls earthquakes 1993; Modoc Plateau; Oregon; Quaternary; seismotectonics; southwestern Oregon; tectonics; United States ER - TY - JOUR T1 - Comparison of site-specific probabilistic seismic hazards and the 1996 national seismic hazard maps in the Western United States AN - 51143448; 2005-003688 JF - Seismological Research Letters AU - Dober, M C AU - Wong, I G AU - Olig, S AU - Schapiro, R AU - Hemphill-Haley, M AU - Fenton, Clark H AU - Thomas, P AU - Ake, J AU - Anonymous Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 249 PB - Seismological Society of America, El Cerrito, CA VL - 73 IS - 2 SN - 0895-0695, 0895-0695 KW - United States KW - geologic hazards KW - statistical analysis KW - magnitude KW - mapping KW - seismic zoning KW - rupture KW - Western U.S. KW - ground motion KW - risk assessment KW - probability KW - earthquakes KW - 19:Seismology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51143448?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Seismological+Research+Letters&rft.atitle=Comparison+of+site-specific+probabilistic+seismic+hazards+and+the+1996+national+seismic+hazard+maps+in+the+Western+United+States&rft.au=Dober%2C+M+C%3BWong%2C+I+G%3BOlig%2C+S%3BSchapiro%2C+R%3BHemphill-Haley%2C+M%3BFenton%2C+Clark+H%3BThomas%2C+P%3BAke%2C+J%3BAnonymous&rft.aulast=Dober&rft.aufirst=M&rft.date=2002-04-01&rft.volume=73&rft.issue=2&rft.spage=249&rft.isbn=&rft.btitle=&rft.title=Seismological+Research+Letters&rft.issn=08950695&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - 97th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. N1 - Date revised - 2005-01-01 N1 - PubXState - CA N1 - Last updated - 2012-06-07 N1 - CODEN - EAQNAT N1 - SubjectsTermNotLitGenreText - earthquakes; geologic hazards; ground motion; magnitude; mapping; probability; risk assessment; rupture; seismic zoning; statistical analysis; United States; Western U.S. ER - TY - JOUR T1 - Fish Communities of the Sacramento River Basin: Implications for Conservation of Native Fishes in the Central Valley, California AN - 19927891; 5625391 AB - The associations of resident fish communities with environmental variables and stream condition were evaluated at representative sites within the Sacramento River Basin, California between 1996 and 1998 using multivariate ordination techniques and by calculating six fish community metrics. In addition, the results of the current study were compared with recent studies in the San Joaquin River drainage to provide a wider perspective of the condition of resident fish communities in the Central Valley of California as a whole. Within the Sacramento drainage, species distributions were correlated with elevational and substrate size gradients; however, the elevation of a sampling site was correlated with a suite of water-quality and habitat variables that are indicative of land use effects on physiochemical stream parameters. Four fish community metrics - percentage of native fish, percentage of intolerant fish, number of tolerant species, and percentage of fish with external anomalies - were responsive to environmental quality. Comparisons between the current study and recent studies in the San Joaquin River drainage suggested that differences in water-management practices may have significant effects on native species fish community structure. Additionally, the results of the current study suggest that index of biotic integrity-type indices can be developed for the Sacramento River Basin and possibly the entire Central Valley, California. The protection of native fish communities in the Central Valley and other arid environments continues to be a conflict between human needs for water resources and the requirements of aquatic ecosystems; preservation of these ecosystems will require innovative management strategies. JF - Environmental Biology of Fishes AU - May, J T AU - Brown, L R AD - California State University Sacramento Foundation, U.S. Geological Survey, WRD, Placer Hall, 6000 J Street, Sacramento, CA 95819-6129, USA, jasonmay@usgs.gov Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 373 EP - 388 VL - 63 IS - 4 SN - 0378-1909, 0378-1909 KW - Aqualine Abstracts; Pollution Abstracts; Sustainability Science Abstracts; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts; Water Resources Abstracts KW - water quality KW - River Basins KW - Resource management KW - Ecosystems KW - Arid environments KW - Water resources KW - Freshwater KW - Water quality KW - Freshwater fish KW - Rivers KW - River basins KW - Habitat KW - Land use KW - Community composition KW - Aquatic Habitats KW - Community structure KW - Water management KW - Stream KW - Environmental quality KW - Conservation KW - Fish KW - Fish Populations KW - Streams KW - Environmental factors KW - Pisces KW - USA, California, San Joaquin R. KW - conflicts KW - USA, California, Sacramento KW - Drainage KW - USA, California, Sacramento R. basin KW - Indigenous species KW - ordination KW - Deserts KW - innovations KW - aquatic ecosystems KW - Ordination KW - USA, California, Central Valley KW - AQ 00001:Water Resources and Supplies KW - Q1 08626:Food technology KW - P 2000:FRESHWATER POLLUTION KW - M3 1010:Issues in Sustainable Development KW - D 04668:Fish KW - SW 2010:Control of water on the surface UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19927891?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Biology+of+Fishes&rft.atitle=Fish+Communities+of+the+Sacramento+River+Basin%3A+Implications+for+Conservation+of+Native+Fishes+in+the+Central+Valley%2C+California&rft.au=May%2C+J+T%3BBrown%2C+L+R&rft.aulast=May&rft.aufirst=J&rft.date=2002-04-01&rft.volume=63&rft.issue=4&rft.spage=373&rft.isbn=&rft.btitle=&rft.title=Environmental+Biology+of+Fishes&rft.issn=03781909&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2007-01-01 N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Resource management; Community composition; Water management; Stream; Arid environments; Water resources; River basins; Freshwater fish; Environmental factors; Indigenous species; Conservation; Water quality; Ordination; conflicts; water quality; Ecosystems; Habitat; Streams; Land use; Deserts; Community structure; ordination; Environmental quality; Fish; innovations; aquatic ecosystems; Rivers; River Basins; Aquatic Habitats; Drainage; Fish Populations; Pisces; USA, California, San Joaquin R.; USA, California, Sacramento; USA, California, Sacramento R. basin; USA, California, Central Valley; Freshwater ER - TY - JOUR T1 - A Serotype-Specific Polymerase Chain Reaction for Identification of Pasteurella multocida Serotype 1 AN - 19288057; 5536330 AB - SUMMARY.A serotype-specific polymerase chain reaction (PCR) assay was developed for detection and identification of Pasteurella multocida serotype 1, the causative agent of avian cholera in wild waterfowl. Arbitrarily primed PCR was used to detect DNA fragments that distinguish serotype 1 from the other 15 serotypes of P. multocida (with the exception of serotype 14). Oligonucleotide primers were constructed from these sequences, and a PCR assay was optimized and evaluated. PCR reactions consistently resulted in amplification products with reference strains 1 and 14 and all other serotype 1 strains tested, with cell numbers as low as 2.3 cells/ml. No amplification products were produced with other P. multocida serotypes or any other bacterial species tested. To compare the sensitivity and further test the specificity of this PCR assay with traditional culturing and serotyping techniques, tissue samples from 84 Pekin ducks inoculated with field strains of P. multocida and 54 wild lesser snow geese collected during an avian cholera outbreak were provided by other investigators working on avian cholera. PCR was as sensitive (58/64) as routine isolation (52/64) in detecting and identifying P. multocida serotype 1 from the livers of inoculated Pekins that became sick or died from avian cholera. No product was amplified from tissues of 20 other Pekin ducks that received serotypes other than type 1 (serotype 3, 12 x 3, or 10) or 12 control birds. Of the 54 snow geese necropsied and tested for P. multocida, our PCR detected and identified the bacteria from 44 compared with 45 by direct isolation. The serotype-specific PCR we developed was much faster and less labor intensive than traditional culturing and serotyping procedures and could result in diagnosis of serotype 1 pasteurellosis within 24 hr of specimen submission.Original Abstract: RESUMEN.Prueba de la reaccion en cadena por la polimerasa serotipo-especifica para la identificacion de la Pasteurella multocida serotipo 1.Se desarrollo una prueba de reaccion en cadena por la polimerasa (PCR) serotipo-especifica para la deteccion e identificacion del serotipo 1 de Pasteurella multocida, agente causal de colera aviar en aves acuaticas salvajes. La prueba de PCR empleando iniciadores escogidos al azar fue empleada con el fin de detectar fragmentos de DNA que pudieran diferenciar el serotipo 1 de P. multocida, de los otros 15 serotipos (con la excepcion del serotipo 14). Se disenaron oligonucleotidos iniciadores a partir de estos fragmentos, y se optimizo y evaluo una prueba de PCR. Productos correspondientes a las cepas de referencia 1 y 14 y a otras cepas examinadas del serotipo 1 fueron obtenidos constantemente a partir de un numero muy bajo de celulas (2.3 celulas por ml). No se produjeron productos de amplificacion cuando se examinaron otros serotipos de P. multocida u otras especies bacterianas. Con el fin de comparar la sensibilidad y posteriormente evaluar la especificidad de esta prueba de PCR con tecnicas tradicionales de cultivo y serotipificacion, muestras de tejidos de 84 patos Pequineses inoculados con cepas de campo de P. multocida y de 54 gansos nevados tomadas durante un brote de colera aviar fueron suministradas por otros investigadores que trabajan actualmente en colera aviar. La prueba de PCR fue tan sensible (58/64) como las tecnicas empleadas de manera rutinaria (52/64) para la deteccion e identificacion del serotipo 1 de P. multocida a partir de higados de patos Pequineses inoculados que llegaron a presentar la enfermedad o murieron de colera aviar. No se amplificaron productos a partir de tejidos de otros 20 patos Pequineses que recibieron serotipos diferentes al serotipo 1 de P. multocida (serotipos 3, 10 o 12) ni de 12 aves empleadas como control. De los 54 gansos nevados a los cuales se les practico la necropsia y fueron examinados contra la P. multocida, la prueba de PCR detecto e identifico la presencia de P. multocida en 44 de ellos, mientras mediante el metodo de aislamiento directo, se detecto la presencia de P. multocida en 45 de ellos. La prueba de PCR serotipo-especifica desarrollada fue mucho mas rapida y menos dispendiosa que los procedimientos tradicionales de cultivo y serotipificacion, pudiendo resultar en el diagnostico de la pasteurellosis serotipo 1 en un tiempo no mayor a 24 horas posteriores a la entrega de los especimenes.Abbreviations: AGP = agar gel precipitation; BHI = brain-heart infusion; dNTP = deoxynucleoside triphosphate; NWHC = National Wildlife Health Center; PCR = polymerase chain reaction; PMSB = Pasteurella multocida selective enrichment broth JF - Avian Diseases AU - Rocke, TE AU - Smith AU - Miyamoto, A AU - Shadduck, D J AD - United States Geological Survey, Biological Resources Division, National Wildlife Health Center, 6006 Schroeder Road, Madison, WI 53711 Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 370 EP - 377 PB - American Association of Avian Pathologists VL - 46 IS - 2 SN - 0005-2086, 0005-2086 KW - Microbiology Abstracts B: Bacteriology KW - Pasteurellosis KW - Serotypes KW - Cell number KW - Snow KW - Liver KW - Polymerase chain reaction KW - Serotyping KW - Pasteurella multocida KW - Cholera KW - Primers KW - Oligonucleotides KW - J 02400:Human Diseases UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/19288057?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Avian+Diseases&rft.atitle=A+Serotype-Specific+Polymerase+Chain+Reaction+for+Identification+of+Pasteurella+multocida+Serotype+1&rft.au=Rocke%2C+TE%3BSmith%3BMiyamoto%2C+A%3BShadduck%2C+D+J&rft.aulast=Rocke&rft.aufirst=TE&rft.date=2002-04-01&rft.volume=46&rft.issue=2&rft.spage=370&rft.isbn=&rft.btitle=&rft.title=Avian+Diseases&rft.issn=00052086&rft_id=info:doi/10.1043%2F0005-2086%282002%29046%280370%3AASSPCR%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2008-12-01 N1 - Last updated - 2015-03-27 N1 - SubjectsTermNotLitGenreText - Pasteurellosis; Serotypes; Cell number; Snow; Liver; Serotyping; Polymerase chain reaction; Primers; Cholera; Oligonucleotides; Pasteurella multocida DO - http://dx.doi.org/10.1043/0005-2086(2002)046(0370:ASSPCR)2.0.CO;2 ER - TY - JOUR T1 - Influence of Topography on Density of Grassland Passerines in Pastures AN - 18624691; 5531188 AB - Pastures provide substantial habitat for grassland birds of management concern in the Driftless Area of southwestern Wisconsin. The rolling topography in this region is characterized by lowland valleys surrounded by relatively steep and often wooded slopes which are set apart from more expansive treeless uplands. We hypothesized that there would be lower densities of area sensitive grassland passerines in lowland grasslands compared to upland grasslands because of their preference for larger more open grasslands. To test this hypothesis and assess how well pasture area and vegetation structure predicted grassland passerine density compared to upland/lowland status, we conducted point counts of birds in 60 pastures in May-June 1997 and 1998. Upland pastures generally supported greater densities of grassland passerines than lowland pastures. Densities of Savannah sparrow (Passerculus sandwichensis) and bobolink (Dolichonyx oryzivorus) were significantly higher in upland pastures than in lowland pastures. Grasshopper sparrow (Ammodramus savannarum) density was significantly higher on uplands in one of the study years. The density of eastern meadowlark (Sturnella magna), western meadowlark (S. neglecta) and sedge wren (Cistothorus platensis) did not differ significantly between uplands and lowlands. Grassland passerine density was also predicted by pasture size and vegetation structure. Densities of bobolink and grasshopper sparrow were higher in larger pastures. Bobolink and Savannah sparrow occurred on pastures with greater vegetation height-density and less bare ground; bobolink also preferred shallower litter depths. Lowland pastures supported grassland bird species of management concern and should not be neglected. However, we recommend that pasture management for grassland passerines in areas of variable topography favor relatively large upland pastures that will contain higher densities of species of management concern. JF - American Midland Naturalist AU - Renfrew, R B AU - Ribic, CA AD - USGS BRD Wisconsin Cooperative Wildlife Research Unit, Department of Wildlife Ecology, University of Wisconsin, Madison 53706, USA, rrenfrew@students.wisc.edu Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 315 EP - 325 VL - 147 IS - 2 SN - 0003-0031, 0003-0031 KW - Perching birds KW - Ecology Abstracts KW - D 04671:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18624691?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=American+Midland+Naturalist&rft.atitle=Influence+of+Topography+on+Density+of+Grassland+Passerines+in+Pastures&rft.au=Renfrew%2C+R+B%3BRibic%2C+CA&rft.aulast=Renfrew&rft.aufirst=R&rft.date=2002-04-01&rft.volume=147&rft.issue=2&rft.spage=315&rft.isbn=&rft.btitle=&rft.title=American+Midland+Naturalist&rft.issn=00030031&rft_id=info:doi/10.1043%2F0003-0031%282002%29147%280315%3AIOTODO%292.0.CO%3B2 L2 - http://journals.allenpress.com/jrnlserv/?request=get-abstract&issn=0003-0031&volume=147&page=315 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/0003-0031(2002)147(0315:IOTODO)2.0.CO;2 ER - TY - JOUR T1 - Chemical and physical characteristics of the Salton Sea, California AN - 18599164; 5422998 AB - A 1-year sampling program was conducted to assess current chemical and physical conditions in the Salton Sea. Analyses included general physical conditions and a suite of water quality parameters, including nutrients, trophic state variables, major cations and anions, trace metals and organic compounds. Samples were collected from three locations in the main body of the lake and from the three major tributaries. Nutrient concentrations in the Salton Sea are high and lead to frequent algal blooms, which in turn contribute to low dissolved oxygen concentrations. The tributaries consist primarily of agricultural return flows with high nutrient levels. Concentrations of trace metals and organic compounds do not appear to be of major concern. Two geochemical models, PHRQPITZ and PHREEQC, were used to evaluate potential chemical reactions limiting the solubility of selected water quality variables. Modeling indicated that the Salton Sea is supersaturated with respect to calcite, gypsum, and other minerals. Precipitation of these minerals may serve as a sink for phosphorus and limit the rate of salt accumulation in the Salton Sea. JF - Hydrobiologia AU - Holdren, G C AU - Montano, A AD - Bureau of Reclamation, P.O. Box 25007 (D-8220), Denver, CO 80225, U.S.A. Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 1 EP - 21 PB - Kluwer Academic Publishers VL - 473 IS - 1-3 SN - 0018-8158, 0018-8158 KW - ASFA 3: Aquatic Pollution & Environmental Quality; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Algal blooms KW - Solubility KW - Anions KW - Inland seas KW - Agricultural pollution KW - Physicochemical properties KW - Calcite KW - Brackish KW - Phytoplankton KW - Water quality KW - Water analysis KW - Dissolved oxygen KW - Gypsum KW - Cations KW - Chemical precipitation KW - Pollutant persistence KW - Nutrients (mineral) KW - Trace metals KW - USA, California, Salton Sea KW - Algae KW - Q5 08503:Characteristics, behavior and fate KW - Q1 08461:Plankton KW - Q2 09184:Composition of water KW - Q1 08422:Environmental effects KW - O 2050:Chemical Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18599164?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrobiologia&rft.atitle=Chemical+and+physical+characteristics+of+the+Salton+Sea%2C+California&rft.au=Holdren%2C+G+C%3BMontano%2C+A&rft.aulast=Holdren&rft.aufirst=G&rft.date=2002-04-01&rft.volume=473&rft.issue=1-3&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Hydrobiologia&rft.issn=00188158&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Algal blooms; Anions; Solubility; Inland seas; Agricultural pollution; Physicochemical properties; Calcite; Phytoplankton; Water quality; Water analysis; Dissolved oxygen; Chemical precipitation; Cations; Gypsum; Pollutant persistence; Nutrients (mineral); Trace metals; Algae; USA, California, Salton Sea; Brackish ER - TY - JOUR T1 - Movements and home ranges of San Joaquin kit foxes (Vulpes macrotis mutica) relative to oil-field development AN - 18456321; 5420189 AB - We examined the effect of oil-field development on movements and patterns of spatial use of San Joaquin kit foxes (Vulpes macrotis mutica) on the Naval Petroleum Reserves in California (NPRC) in the San Joaquin Valley. To do this, we compared movements and home ranges of kit foxes from June 1984 to September 1985 in areas developed for petroleum production (30% of native habitat lost to production facilities) and areas with little development (3%). Distances traveled nightly by kit foxes did not differ between levels of petroleum development or between sexes (P > 0.2). Mean length of nightly movements during breeding (14.6 km) was longer than during pup-rearing (10.7 km) and pup-dispersal (9.4 km) periods (P = 0.01). Mean size of home ranges was 4.6 plus or minus 0.4 km super(2) (n = 21) and did not differ between levels of petroleum development and sexes (P > 0.2). Overlap of home ranges of foxes from the same social group (78 plus or minus 4.3%) was greater than that of same-sex foxes (35 plus or minus 7.8%) and males and females of different social groups (32 plus or minus 8.0%, P 0.4). Despite extensive overlap of home ranges, kit foxes on NPRC maintained relatively exclusive core areas, particularly adjacent foxes of the same sex. Future studies should examine which levels of habitat conversion impact spatial use of kit foxes. JF - Western North American Naturalist AU - Zoellick, B W AU - Harris, CE AU - Kelly, B T AU - O'Farrell, T P AU - Kato, T T AU - Koopman, ME AD - U.S. Bureau of Land Management, Lower Snake River District Office, 3948 Development Avenue, Boise, ID 83705, USA Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 151 EP - 159 VL - 62 IS - 2 SN - 1527-0904, 1527-0904 KW - Kit fox KW - Animal Behavior Abstracts; Ecology Abstracts KW - D 04672:Mammals KW - Y 25507:Mammals (excluding primates) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18456321?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Western+North+American+Naturalist&rft.atitle=Movements+and+home+ranges+of+San+Joaquin+kit+foxes+%28Vulpes+macrotis+mutica%29+relative+to+oil-field+development&rft.au=Zoellick%2C+B+W%3BHarris%2C+CE%3BKelly%2C+B+T%3BO%27Farrell%2C+T+P%3BKato%2C+T+T%3BKoopman%2C+ME&rft.aulast=Zoellick&rft.aufirst=B&rft.date=2002-04-01&rft.volume=62&rft.issue=2&rft.spage=151&rft.isbn=&rft.btitle=&rft.title=Western+North+American+Naturalist&rft.issn=15270904&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - The western pond turtle (Clemmys marmorata) in the Mojave River, California, USA: highly adapted survivor or tenuous relict? AN - 18448154; 5427131 AB - Aspects of the ecology of populations of the western pond turtle Clemmys marmorata were investigated in the Mojave River of the central Mojave Desert, California, U.S.A. One population occupied man-made ponds and the other occurred in natural ponds in the flood plain of the Mojave River. Both habitats are severely degraded as a result of ground water depletion from human activities along the river and one is infested with the exotic shrub saltcedar Tamarix ramosissima. Mean female carapace length (CL) was significantly greater (14.4 cm) than that of males (13.7 cm). Live juveniles were not detected during the period of study. Shelled eggs were visible in X-radiographs from 26 May to 14 July. Mean clutch size was 4.46 and ranged from 3 to 6 eggs. Clutch size did not vary between 1998 and 1999 but was significantly correlated with CL for both years combined, increasing at the rate of 0.548 eggs/cm CL. Gravid female CL ranged from 13.3-16.0 cm. Some females nested in both years. Mean X-ray egg width (21.8 mm) was not significantly correlated with CL or clutch size. X-ray egg width differed more among clutches than within, whether including CL as a co-variate or not. Nesting migrations occurred from 6 June to 8 July with minimum round trip distances ranging from 17.5-585 m with a mean of 195 m. Mean estimated time of departure as measured at the drift fence was 18:13. Most females returned to the ponds in the early morning. Nesting migrations required females to be out of the water for estimated periods of 0.83 to 86 h. The destination of nesting females was typically fluvial sand bars in the channel of the dry riverbed. Overall, the ecology of C. marmorata in the Mojave River is very similar to that reported for populations in less severe habitats along the west coast of the United States. Notable exceptions include long nesting migrations to sandbars in the dry river channel, a possible result of human modifications to the environment, and an apparent lack of terrestrial overwintering behaviour in Mojave River populations. The general similarity of desert and coastal populations is possibly a reflection of their recent geographic separation. Overall, populations in the Mojave River exhibit few obvious adaptations to living in the desert and are considered to be tenuous relicts of the Pleistocene. The small size and tenuous status of these populations suggests that immediate conservation action is needed, including establishment of satellite populations as a hedge against extirpation. JF - Journal of Zoology AU - Lovich, J AU - Meyer, K AD - United States Geological Survey, Western Ecological Research Center, 7801 Folsom Boulevard, Suite 101, Sacramento, CA 95826, USA Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 537 EP - 545 VL - 256 IS - 4 SN - 0952-8369, 0952-8369 KW - Western pond turtle KW - Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality KW - Freshwater KW - Q5 01523:Conservation, wildlife management and recreation KW - D 04670:Reptiles KW - Q1 01324:Reproduction and development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18448154?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Zoology&rft.atitle=The+western+pond+turtle+%28Clemmys+marmorata%29+in+the+Mojave+River%2C+California%2C+USA%3A+highly+adapted+survivor+or+tenuous+relict%3F&rft.au=Lovich%2C+J%3BMeyer%2C+K&rft.aulast=Lovich&rft.aufirst=J&rft.date=2002-04-01&rft.volume=256&rft.issue=4&rft.spage=537&rft.isbn=&rft.btitle=&rft.title=Journal+of+Zoology&rft.issn=09528369&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Sensitivity of breeding parameters to food supply in Black-legged Kittiwakes Rissa tridactyla AN - 18445532; 5421121 AB - We fed Herring Clupea pallasi to pairs of Black-legged Kittiwakes Rissa tridactyla throughout the breeding season in two years at a colony in the northern Gulf of Alaska. We measured responses to supplemental feeding in a wide array of breeding parameters to gauge their relative sensitivity to food supply, and thus their potential as indicators of natural foraging conditions. Conventional measures of success (hatching, fledging and overall productivity) were more effective as indicators of food supply than behavioural attributes such as courtship feeding, chick provisioning rates and sibling aggression. However, behaviour such as nest relief during incubation and adult attendance with older chicks were also highly responsive to supplemental food and may be useful for monitoring environmental conditions in studies of shorter duration. On average, the chick-rearing stage contained more sensitive indicators of food availability than prelaying or incubation stages. Overall, rates of hatching and fledging success, and the mean duration of incubation shifts were the most food-sensitive parameters studied. JF - Ibis AU - Gill, V A AU - Hatch, SA AU - Lanctot, R B AD - U.S. Geological Survey, Alaska Biological Science Center, 1011 East Tudor Road, Anchorage, Alaska 99503, USA, verena_gill@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 268 EP - 283 PB - Blackwell Science Ltd. VL - 144 IS - 2 SN - 0019-1019, 0019-1019 KW - Black-legged Kittiwake KW - Animal Behavior Abstracts; Ecology Abstracts; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Marine KW - Q1 01364:Reproduction and development KW - O 1070:Ecology/Community Studies KW - D 04671:Birds KW - Q1 01423:Behaviour KW - Y 25506:Birds KW - O 1050:Vertebrates, Urochordates and Cephalochordates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18445532?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ibis&rft.atitle=Sensitivity+of+breeding+parameters+to+food+supply+in+Black-legged+Kittiwakes+Rissa+tridactyla&rft.au=Gill%2C+V+A%3BHatch%2C+SA%3BLanctot%2C+R+B&rft.aulast=Gill&rft.aufirst=V&rft.date=2002-04-01&rft.volume=144&rft.issue=2&rft.spage=268&rft.isbn=&rft.btitle=&rft.title=Ibis&rft.issn=00191019&rft_id=info:doi/l0.1046%2Fj.1474-919X.2002.00043.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Marine DO - http://dx.doi.org/l0.1046/j.1474-919X.2002.00043.x ER - TY - JOUR T1 - Chemical evolution of the Salton Sea, California: nutrient and selenium dynamics AN - 18443154; 5423009 AB - The Salton Sea is a 1000-km super(2) terminal lake located in the desert area of southeastern California. This saline ( similar to 44 000 mg l super(-1) dissolved solids) lake started as fresh water in 1905-07 by accidental flooding of the Colorado River, and it is maintained by agricultural runoff of irrigation water diverted from the Colorado River. The Salton Sea and surrounding wetlands have recently acquired substantial ecological importance because of the death of large numbers of birds and fish, and the establishment of a program to restore the health of the Sea. In this report, we present new data on the salinity and concentration of selected chemicals in the Salton Sea water, porewater and sediments, emphasizing the constituents of concern: nutrients (N and P), Se and salinity. Chemical profiles from a Salton Sea core estimated to have a sedimentation rate of 2.3 mm yr super(-1) show increasing concentrations of OC, N, and P in younger sediment that are believed to reflect increasing eutrophication of the lake. Porewater profiles from two locations in the Sea show that diffusion from bottom sediment is only a minor source of nutrients to the overlying water as compared to irrigation water inputs. Although loss of N and Se by microbial-mediated volatilization is possible, comparison of selected element concentrations in river inputs and water and sediments from the Salton Sea indicates that most of the N (from fertilizer) and virtually all of the Se (delivered in irrigation water from the Colorado River) discharged to the Sea still reside within its bottom sediment. Laboratory simulation on mixtures of sediment and water from the Salton Sea suggest that sediment is a potential source of N and Se to the water column under aerobic conditions. Hence, it is important that any engineered changes made to the Salton Sea for remediation or for transfer of water out of the basin do not result in remobilization of nutrients and Se from the bottom sediment into the overlying water. JF - Hydrobiologia AU - Schroeder, R A AU - Orem, W H AU - Kharaka, Y K AD - U.S. Geological Survey, 5735 Kearny Villa Road, Suite O, San Diego, CA 92123, U.S.A., raschroe@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 23 EP - 45 PB - Kluwer Academic Publishers VL - 473 IS - 1-3 SN - 0018-8158, 0018-8158 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts KW - Brackish KW - Q5 01503:Characteristics, behavior and fate KW - Q2 02184:Composition of water KW - D 04320:Brackishwater KW - O 2050:Chemical Oceanography UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18443154?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrobiologia&rft.atitle=Chemical+evolution+of+the+Salton+Sea%2C+California%3A+nutrient+and+selenium+dynamics&rft.au=Schroeder%2C+R+A%3BOrem%2C+W+H%3BKharaka%2C+Y+K&rft.aulast=Schroeder&rft.aufirst=R&rft.date=2002-04-01&rft.volume=473&rft.issue=1-3&rft.spage=23&rft.isbn=&rft.btitle=&rft.title=Hydrobiologia&rft.issn=00188158&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Brackish ER - TY - JOUR T1 - Population dynamics of tule elk at Point Reyes National Seashore, California AN - 18429538; 5416614 AB - The presence of locally abundant wildlife raises questions about natural regulation and ecological consequences of overpopulation. We sought to establish precise information about population size, structure, and productivity to examine the role of natural regulation in a closed tule elk (Cervus elaphus nannodes) population at Point Reyes National Seashore, California, USA. We estimated an instantaneous exponential growth rate of 0.19 with an adjusted R super(2) = 0.98 during 1998, 20 years after the elk were introduced. We estimated annual survival for adult cows of nearly 0.95. Calf survival from birth through the rut ending during October-November was 0.85. Male calves exhibited higher mortality than female calves. Cow mortality was associated with the calving season. We measured a 42% increase in cow:calf density from 0.733 ha super(-1) to 1.043 ha super(-1) during 1996-1998. We observed a density-correlated reduction in the rate of increase and in the cow:calf ratios prior to high precipitation El Nino Southern Oscillation years, 1993, 1996, and 1997, precipitation >1.23 m year super(-1). Given the high population growth rate and model evaluation of management scenarios, park managers will need to use a suite of approaches, such as contraception and removal, to maintain the elk population at levels at or near the closed-range carrying capacity for years between El Nino events. JF - Journal of Wildlife Management AU - Howell, JA AU - Brooks, G C AU - Semenoff-Irving, M AU - Greene, C AD - U.S. Geological Survey, Western Ecological Research Center, 7801 Folsom Boulevard, Suite 101, Sacramento, CA 95826, USA, judd_howell@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 478 EP - 490 VL - 66 IS - 2 SN - 0022-541X, 0022-541X KW - Tule elk KW - Wapiti KW - Ecology Abstracts KW - D 04700:Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18429538?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Wildlife+Management&rft.atitle=Population+dynamics+of+tule+elk+at+Point+Reyes+National+Seashore%2C+California&rft.au=Howell%2C+JA%3BBrooks%2C+G+C%3BSemenoff-Irving%2C+M%3BGreene%2C+C&rft.aulast=Howell&rft.aufirst=JA&rft.date=2002-04-01&rft.volume=66&rft.issue=2&rft.spage=478&rft.isbn=&rft.btitle=&rft.title=Journal+of+Wildlife+Management&rft.issn=0022541X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Inferring the absence of a species -- A case study of snakes AN - 18428579; 5416598 AB - Though the presence of a species can be unequivocally confirmed, its absence can only be inferred with a degree of probability. I used a model to calculate the minimum number of unsuccessful visits to a site that are necessary to assume that a species is absent. The model requires the probability of detection of the species per visit to be known. This probability may vary depending on habitat, year, season, the area surveyed, the population size of the species, and the observer. I studied 3 European snake species - asp viper (Vipera aspis), smooth snake (Coronella austriaca), and grass snake (Natrix natrix) - over a 5-yr (1994-1998) interval, and made 645 visits to 87 sites during their activity periods. I used a generalized logistic regression approach with random effects for years and sites to (1) estimate the probability of detection of these species from sites known to be occupied, (2) test factors affecting it, and (3) compute the minimum number of times that a site must be visited to infer the absence of the particular species. Probability of detection for all species was heavily influenced by an index of population size. For V. aspis, probability of detection increased from 0.23 to 0.50 and 0.70 in small, medium, and large populations, respectively. Similarly, probability of detection increased from 0.09 to 0.45 and 0.56 in small, medium, and large populations of C. austriaca, respectively, and from 0.11 in small to 0.25 in medium and large populations of N. natrix. Probability of detection also varied across months for all 3 species, among habitat types (C. austriaca only), and from year to year (N. natrix only). Sites with unknown occupancy status conservatively may be assumed to be occupied by small populations. I calculated that such sites need to be surveyed 12, 34, and 26 times for V. aspis, C. austriaca, and N. natrix, respectively, before assuming with 95% probability that the site is unoccupied. These results suggest that some species may be more widespread than thought. However, to ascertain the presence of such species at a site, search efforts need to be intensive. JF - Journal of Wildlife Management AU - Kery, M AD - USGS Patuxent Wildlife Research Center, 11510 American Holly Drive, Laurel, MD 20708, USA, mkery@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 330 EP - 338 VL - 66 IS - 2 SN - 0022-541X, 0022-541X KW - detection probability KW - Ecology Abstracts KW - D 04700:Management UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18428579?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Wildlife+Management&rft.atitle=Inferring+the+absence+of+a+species+--+A+case+study+of+snakes&rft.au=Kery%2C+M&rft.aulast=Kery&rft.aufirst=M&rft.date=2002-04-01&rft.volume=66&rft.issue=2&rft.spage=330&rft.isbn=&rft.btitle=&rft.title=Journal+of+Wildlife+Management&rft.issn=0022541X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Mercury in feathers from Chilean birds: influence of location, feeding strategy, and taxonomic affiliation AN - 18428328; 5416510 AB - This study reports baseline concentrations of mercury (Hg) in feathers from different species of birds sampled at various locations off the Chilean coast (Southeastern Pacific). Hg concentrations were evaluated in relation to geographic location, taxonomic affiliation, and feeding strategies. Between January and March of 1995, we collected mature contour feathers from 116 birds belonging to 22 species, mostly seabirds. Birds were collected from 10 different locations (26 degree 09'S, 70 degree 40'W to 54 degree 56'S, 67 degree 37'W). Feather Hg concentrations ranged from 0.11 to 13 mu g g super(-1) dry weight. We found differences in feather Hg concentrations across taxonomic groups, with highest concentrations in petrels, shearwaters, and albatrosses (Procellariidae), followed by boobies (Sulidae), gulls, terns, skuas (Laridae) and cormorants (Phalacrocoracidae). Ibises and oystercatchers (Threskiornithidae and Charadriidae) had intermediate values, whereas ducks and geese (Anatidae) contained the least amount of Hg. Oceanic species preying on mesopelagic fish (the Procellariformes albatrosses, petrels, and fulmars) had over twice as much Hg (overall average of 3.9 mu g g super(-1)) when compared to the rest of the species sampled (overall average of 1.5 mu g g super(-1)). We did not find higher Hg concentrations in birds inhabiting the more heavily industrialized and urbanized areas of the country (central and northern regions), but in birds inhabiting the remote Juan Fernandez Archipelago. This is not surprising, since all the Procellariformes (the group with highest Hg values in this study) were collected from these islands. Except for Hg in Kermadec petrels (mean of 12 mu g g super(-1)), the range of Hg values reported here (0.11-7.3 mu g g super(-1)) fell below those known to cause adverse health and reproductive effects in birds. JF - Marine Pollution Bulletin AU - Ochoa-acuna, H AU - Sepulveda AU - Gross, T S AD - Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA, marisol_sepulveda@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 340 EP - 349 VL - 44 IS - 4 SN - 0025-326X, 0025-326X KW - Albatrosses KW - Birds KW - Boobies KW - Chile KW - Cormorants KW - Ducks KW - Gannets KW - Geese KW - Gulls KW - Ibises KW - Petrels KW - Plovers KW - Shearwaters KW - Spoonbills KW - Swans KW - Terns KW - Tube-nosed swimmers KW - birds KW - Toxicology Abstracts; Aqualine Abstracts; Water Resources Abstracts; Pollution Abstracts; Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality KW - Marine KW - O 4020:Pollution - Organisms/Ecology/Toxicology KW - X 24222:Analytical procedures KW - SW 3020:Sources and fate of pollution KW - P 1000:MARINE POLLUTION KW - SW 3030:Effects of pollution KW - AQ 00008:Effects of Pollution KW - Q5 01504:Effects on organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18428328?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+Pollution+Bulletin&rft.atitle=Mercury+in+feathers+from+Chilean+birds%3A+influence+of+location%2C+feeding+strategy%2C+and+taxonomic+affiliation&rft.au=Ochoa-acuna%2C+H%3BSepulveda%3BGross%2C+T+S&rft.aulast=Ochoa-acuna&rft.aufirst=H&rft.date=2002-04-01&rft.volume=44&rft.issue=4&rft.spage=340&rft.isbn=&rft.btitle=&rft.title=Marine+Pollution+Bulletin&rft.issn=0025326X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Marine ER - TY - JOUR T1 - Effect of Growth Conditions and Staining Procedure upon the Subsurface Transport and Attachment Behaviors of a Groundwater Protist AN - 18383819; 5350052 AB - The transport and attachment behaviors of Spumella guttula (Kent), a nanoflagellate (protist) found in contaminated and uncontaminated aquifer sediments in Cape Cod, Mass., were assessed in flowthrough and static columns and in a field injection-and-recovery transport experiment involving an array of multilevel samplers. Transport of S. guttula harvested from low-nutrient (10 mg of dissolved organic carbon per liter), slightly acidic, granular (porous) growth media was compared to earlier observations involving nanoflagellates grown in a traditional high-nutrient liquid broth. In contrast to the highly retarded (retardation factor of approximately 3) subsurface transport previously reported for S. guttula, the peak concentration of porous-medium-grown S. guttula traveled concomitantly with that of a conservative (bromide) tracer. About one- third of the porous-medium-grown nanoflagellates added to the aquifer were transported at least 2.8 m downgradient, compared to only approximately 2% of the broth- grown nanoflagellates. Flowthrough column studies revealed that a vital (hydroethidine [HE]) staining procedure resulted in considerably less attachment (more transport) of S. guttula in aquifer sediments than did a staining-and- fixation procedure involving 4',6'-diamidino-2-phenylindole (DAPI) and glutaraldehyde. The calculated collision efficiency ( approximately 10 super(-2) for porous- medium-grown, DAPI-stained nanoflagellates) was comparable to that observed earlier for the indigenous community of unattached groundwater bacteria that serve as prey. The attachment of HE-labeled S. guttula onto aquifer sediment grains was independent of pH (over the range from pH 3 to 9) suggesting a primary attachment mechanism that may be fundamentally different from that of their prey bacteria, which exhibit sharp decreases in fractional attachment with increasing pH. The high degree of mobility of S. guttula in the aquifer sediments has important ecological implications for the protistan community within the temporally changing plume of organic contaminants in the Cape Cod aquifer. JF - Applied and Environmental Microbiology AU - Harvey, R W AU - Mayberry, N AU - Kinner, N E AU - Metge, D W AU - Novarino, F AD - U.S. Geological Survey, 3215 Marine St., Boulder, CO 80303-1066., rwharvey@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 1872 EP - 1881 VL - 68 IS - 4 SN - 0099-2240, 0099-2240 KW - USA, Massachusetts KW - attachment KW - Water Resources Abstracts; Aqualine Abstracts; Microbiology Abstracts C: Algology, Mycology & Protozoology KW - AQ 00001:Water Resources and Supplies KW - K 03095:Soil KW - SW 0840:Groundwater UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18383819?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Applied+and+Environmental+Microbiology&rft.atitle=Effect+of+Growth+Conditions+and+Staining+Procedure+upon+the+Subsurface+Transport+and+Attachment+Behaviors+of+a+Groundwater+Protist&rft.au=Harvey%2C+R+W%3BMayberry%2C+N%3BKinner%2C+N+E%3BMetge%2C+D+W%3BNovarino%2C+F&rft.aulast=Harvey&rft.aufirst=R&rft.date=2002-04-01&rft.volume=68&rft.issue=4&rft.spage=1872&rft.isbn=&rft.btitle=&rft.title=Applied+and+Environmental+Microbiology&rft.issn=00992240&rft_id=info:doi/10.1128%2FAEM.68.4.1872-1881.2002 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1128/AEM.68.4.1872-1881.2002 ER - TY - JOUR T1 - Effects of rearing temperature on immune functions in sockeye salmon ( Oncorhynchus nerka ) AN - 18374597; 5353076 AB - To determine if the defences of sockeye salmon (Oncorhynchus nerka) raised in captivity are affected by the rearing temperature or their life-cycle stage, various indices of the humoral and cellular immune functions were measured in fish reared at either 8 or 12 degree C for their entire life-cycle. Measures of humoral immunity included the commonly used haematological parameters, as well as measurements of complement, and lysozyme activity. Cellular assays quantified the ability of macrophages from the anterior kidney to phagocytise Staphylococcus aureus cells, or the activities of certain bactericidal systems of those cells. The T-dependent antibody response to a recombinant 57 kDa protein ofRenibacterium salmoninarum was used to quantify the specific immune response. Fish were sampled during the spring and fall of their second, third and fourth years, corresponding to a period that began just before smolting and ended at sexual maturation. Fish reared at 8 degree C tended to have a greater percentage of phagocytic kidney macrophages during the first 2 years of sampling than the fish reared at 12 degree C. During the last half of the study the complement activity of the fish reared at 8 degree C was greater than that of the 12 degree C fish. Conversely, a greater proportion of the blood leucocytes were lymphocytes in fish reared at 12 degree C compared to the fish reared at 8 degree C. Fish reared at 12 degree C also produced a greater antibody response than those reared at 8 degree C. Results suggested that the immune apparatus of sockeye salmon reared at 8 degree C relied more heavily on the non-specific immune response, while the specific immune response was used to a greater extent when the fish were reared at 12 degree C. Although a seasonal effect was not detected in any of the indices measured, varying effects were observed in some measurements during sexual maturation of fish in both temperature groups. At that time there were dramatic decreases in complement activity and lymphocyte numbers. This study was unique in its scope because it was the first quantitative assessment of salmon immune functions for an entire life-cycle. Copyright 2002 Elsevier Science Ltd. JF - Fish & Shellfish Immunology AU - Alcorn, S W AU - Murray, AL AU - Pascho, R J AD - Western Fisheries Research Center, Biological Resources Division, United States Geological Survey, 6505 N.E. 65th Street, Seattle, Washington, 98115, U.S.A., ron_pascho@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 303 EP - 334 PB - Academic Press VL - 12 IS - 4 SN - 1050-4648, 1050-4648 KW - Blueback salmon KW - Kokanee KW - Red salmon KW - Sockeye salmon KW - ASFA Aquaculture Abstracts; ASFA 1: Biological Sciences & Living Resources; Oceanic Abstracts; Microbiology Abstracts B: Bacteriology; Immunology Abstracts KW - Q3 01582:Fish culture KW - J 02833:Immune response and immune mechanisms KW - O 5060:Aquaculture KW - F 06784:Fish immunity KW - Q1 01582:Fish culture UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18374597?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologyb&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Fish+%26+Shellfish+Immunology&rft.atitle=Effects+of+rearing+temperature+on+immune+functions+in+sockeye+salmon+%28+Oncorhynchus+nerka+%29&rft.au=Alcorn%2C+S+W%3BMurray%2C+AL%3BPascho%2C+R+J&rft.aulast=Alcorn&rft.aufirst=S&rft.date=2002-04-01&rft.volume=12&rft.issue=4&rft.spage=303&rft.isbn=&rft.btitle=&rft.title=Fish+%26+Shellfish+Immunology&rft.issn=10504648&rft_id=info:doi/10.1006%2Ffsim.2001.0373 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1006/fsim.2001.0373 ER - TY - JOUR T1 - Does Increasing Daylength Control Seasonal Changes In Clutch Sizes Of Northern Pintails (Anas acuta)? AN - 1791886625; 5373545 AB - We evaluated spatiotemporal variation in clutch sizes of Northern Pintails (pintails; Anas acuta) nesting in California (1985 to 1996), North Dakota (1982 to 1985), Saskatchewan (1982 to 1985) and Alaska (1991 to 1993) to determine whether seasonal declines in clutch size varied in ways that were consistent with a controlling influence of increasing day length. Pintails began nesting in mid-March in California, mid-April in North Dakota and Saskatchewan, and mid-May in Alaska. Observed durations of nesting were 70 c 2.6 days (SE) in California, 60 c 6.3 days in North Dakota, 66 c 1.3 days in Saskatchewan, and 42 c 0.7 days in Alaska. Annual differences were the principal source of variation in mean clutch sizes ([sigmacirc]Y2 = 0.15, SE = 0.049), which varied little among study locations ([sigmacirc]A2 = 0.002, SE = 0.013). Predicted rates of seasonal decline in clutch sizes increased with latitude early in the nesting season, but declined as the nesting season progressed, except in California. Rates of decline in clutch sizes thus were not directly related to rates of increase in day length. Predicted declines in numbers of eggs per clutch over the nesting season were similar for all four locations (range, 3.05-3.12) despite wide variation in durations of nesting. Evidence suggests that reduced nutrient availability during nesting contributes to a higher rate of decline in clutch sizes in Alaska than in temperate regions. Pintails that nest early lay large initial clutches, but thereafter clutch sizes decline rapidly and breeding terminates early. This reproductive strategy is adaptive because young that hatch earliest exhibit the highest survival rates; however, the conversion of grassland to cropland on the primary prairie breeding grounds has reduced hatching rates of clutches laid early in the nesting season. Under these conditions, the limited capacity to renest in late spring on their prairie breeding grounds probably has contributed to Pintail population declines. JF - Auk AU - Krapu, G L AU - Sargeant, G A AU - Perkins, AEH AD - U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, North Dakota 58401, USA, gary_krapu@usgs.gov Y1 - 2002/04// PY - 2002 DA - April 2002 SP - 498 EP - 506 PB - The American Ornithologists Union VL - 119 IS - 2 SN - 0004-8038, 0004-8038 KW - Northern pintail KW - clutch size KW - population declines KW - Animal Behavior Abstracts; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - USA, Alaska KW - Seasonality KW - Canada, Saskatchewan KW - Photoperiods KW - Freshwater KW - Daylength KW - Bird eggs KW - Light effects KW - Anas acuta KW - USA, North Dakota KW - Clutch KW - Latitudinal variations KW - USA, California KW - Seasonal variations KW - D 04671:Birds KW - Y 25426:Birds KW - Q1 08364:Reproduction and development UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1791886625?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Auk&rft.atitle=Does+Increasing+Daylength+Control+Seasonal+Changes+In+Clutch+Sizes+Of+Northern+Pintails+%28Anas+acuta%29%3F&rft.au=Krapu%2C+G+L%3BSargeant%2C+G+A%3BPerkins%2C+AEH&rft.aulast=Krapu&rft.aufirst=G&rft.date=2002-04-01&rft.volume=119&rft.issue=2&rft.spage=498&rft.isbn=&rft.btitle=&rft.title=Auk&rft.issn=00048038&rft_id=info:doi/10.1043%2F0004-8038%282002%29119%280498%3ADIDCSC%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-05-27 N1 - SubjectsTermNotLitGenreText - Seasonality; Photoperiods; Clutch; Latitudinal variations; Bird eggs; Light effects; clutch size; Seasonal variations; Daylength; Anas acuta; USA, Alaska; Canada, Saskatchewan; USA, North Dakota; USA, California; Freshwater DO - http://dx.doi.org/10.1043/0004-8038(2002)119(0498:DIDCSC)2.0.CO;2 ER - TY - JOUR T1 - Summer movements of desert pupfish among habitats at the Salton Sea AN - 1665486966; 5423007 AB - Summer movement behavior of native desert pupfish (Cyprinodon macularius Baird and Girard) was evaluated among various habitats around the Salton Sea, located in southern California. Agricultural drains, shoreline pools, and Salt Creek were sampled six times between June 28 and September 16, 1999. Collected pupfish were marked using fluorescent elastomer implants. Unique marks were used at each site. Movements were detected from locations of recaptured pupfish. Desert pupfish were found in 10 of 12 sites sampled. Of 3239 pupfish captured during the study, 278 were recaptures, including 27 recaptures at areas different from where they were initially marked. The best evidence of pupfish movements was in the southwestern area of the Salton Sea between a drain and a connected shoreline pool. Movements were also observed from lower Salt Creek into a shoreline pool at the mouth of the creek as the water level dropped. The use of the Salton Sea as a migration corridor between habitats was not documented during this short study. The marking technique was successful and showed promise for future mark and recapture studies of desert pupfish. JF - Hydrobiologia AU - Sutton, R J AD - U.S. Bureau of Reclamation, P.O. Box 25007 (D-8210), Denver, CO 80225, U.S.A. Y1 - 2002/04// PY - 2002 DA - Apr 2002 SP - 223 EP - 228 PB - Kluwer Academic Publishers VL - 473 IS - 1-3 SN - 0018-8158, 0018-8158 KW - Desert pupfish KW - Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts; Animal Behavior Abstracts KW - Arid environments KW - Brackish KW - Summer KW - Habitat KW - Local movements KW - Tags KW - Capture-recapture studies KW - Deserts KW - USA, California, Salt Creek KW - Movements KW - Saline water KW - USA, California KW - Cyprinodon macularius KW - USA, California, Salton Sea KW - Marking KW - O 1070:Ecology/Community Studies KW - Q1 08421:Migrations and rhythms KW - Y 25505:Fish KW - D 04668:Fish UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665486966?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrobiologia&rft.atitle=Summer+movements+of+desert+pupfish+among+habitats+at+the+Salton+Sea&rft.au=Sutton%2C+R+J&rft.aulast=Sutton&rft.aufirst=R&rft.date=2002-04-01&rft.volume=473&rft.issue=1-3&rft.spage=223&rft.isbn=&rft.btitle=&rft.title=Hydrobiologia&rft.issn=00188158&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Tags; Local movements; Deserts; Arid environments; Saline water; Summer; Habitat; Marking; Capture-recapture studies; Movements; Cyprinodon macularius; USA, California, Salt Creek; USA, California; USA, California, Salton Sea; Brackish ER - TY - JOUR T1 - A field-based study of soil water and groundwater nitrate release in an Adirondack forested watershed AN - 16138426; 5435179 AB - Nitrate (NO sub(3) super(-)) movement was studied using a combination of isotopic, chemical, and hydrometric data within the 135 ha Archer Creek watershed in the Adirondack Mountains of New York from January 1995 to December 1996. This research was conducted to identify sources of stream water NO sub(3) super(-) and the mechanisms that deliver NO sub(3) super(-) to the stream to test two hypotheses: (1) Soil water NO sub(3) super(-) concentrations are highest after dry periods and subsequently lower with each storm. (2) Stream water NO sub(3) super(-) concentrations are controlled by groundwater during growing season low flows and by soil water during the dormant season and during storms. Antecedent moisture conditions and season had little effect on mean soil water NO sub(3) super(-) concentrations before storms (range of 1.1-5.1 mu mol L super(-1) throughout the study). High soil water NO sub(3) super(-) concentrations (up to 136 mu mol L super(-1)) were found only at the watershed ridge top during the 1996 snowmelt and early summer. Results from isotopic hydrograph separations and chemical end-member mixing analysis showed that soil water and till groundwater dominated stream base flow and storm flow during six monitored storms. Near-stream wetland groundwater and event water contributed little to streamflow during most conditions. Near-stream groundwater contributions to streamflow were significant only during very low base flow (<0.05 mm h super(-1)) during the summer and fall. Highest stream water NO sub(3) super(-) concentrations coincided with peaks in the till groundwater contribution according to isotopic hydrograph separations using delta super(18)O and chloride as conservative tracers. A conceptualization of streamflow generation and watershed NO sub(3) super(-) release is described in which hillslope hollows are the principal zones of soil water and till groundwater mixing in the watershed and till groundwater is the main source of stream water NO sub(3) super(-) during both base flow and storms. JF - Water Resources Research AU - McHale, M R AU - McDonnell, J J AU - Mitchell, MJ AU - Cirmo, C P AD - U.S. Geological Survey, 425 Jordan Road, Troy, NY 12180, USA, mmchale@usgs.gov Y1 - 2002/04// PY - 2002 DA - Apr 2002 VL - 38 IS - 4 SN - 0043-1397, 0043-1397 KW - USA, New York, Adirondack Mts. KW - Pollution Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - Nitrate KW - Seasonal Variations KW - Chemistry of groundwater KW - Water Pollution Sources KW - Path of Pollutants KW - Soil Water KW - Streamflow-watershed relationships KW - Freshwater KW - Watersheds KW - Forest Watersheds KW - Streams KW - Catchment areas KW - Soils KW - Ground water KW - Wetlands KW - Chemical Composition KW - Seasonal variations KW - Chemical composition KW - Nitrates KW - Soil/water systems KW - Streamflow KW - Streams (in natural channels) KW - USA, New York, Archer R. KW - Water pollution KW - Watershed chemistry KW - Stream flow KW - Soil water chemistry KW - Surface-groundwater Relations KW - Seasons KW - Groundwater (see also Aquifers) KW - Catchments KW - Groundwater KW - Pollution (Water) KW - Q5 08503:Characteristics, behavior and fate KW - M2 556.38:Groundwater Basins (556.38) KW - P 2000:FRESHWATER POLLUTION KW - M2 551.579:Hydrometeorology (551.579) KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16138426?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Water+Resources+Research&rft.atitle=A+field-based+study+of+soil+water+and+groundwater+nitrate+release+in+an+Adirondack+forested+watershed&rft.au=McHale%2C+M+R%3BMcDonnell%2C+J+J%3BMitchell%2C+MJ%3BCirmo%2C+C+P&rft.aulast=McHale&rft.aufirst=M&rft.date=2002-04-01&rft.volume=38&rft.issue=4&rft.spage=&rft.isbn=&rft.btitle=&rft.title=Water+Resources+Research&rft.issn=00431397&rft_id=info:doi/10.1029%2F2000WR000102 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-12-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Chemical composition; Nitrates; Soils; Ground water; Wetlands; Watersheds; Soil water chemistry; Chemistry of groundwater; Streamflow-watershed relationships; Seasonal variations; Watershed chemistry; Catchments; Groundwater; Streams; Water pollution; Nitrate; Catchment areas; Seasons; Soil/water systems; Groundwater (see also Aquifers); Streams (in natural channels); Pollution (Water); Stream flow; Seasonal Variations; Surface-groundwater Relations; Path of Pollutants; Water Pollution Sources; Streamflow; Soil Water; Chemical Composition; Forest Watersheds; USA, New York, Archer R.; Freshwater DO - http://dx.doi.org/10.1029/2000WR000102 ER - TY - CPAPER T1 - Influence of 5- and 20-year old Phragmites australis populations on rates of accretion AN - 39573592; 3665325 AU - Rooth, JE AU - Stevenson, J C Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 KW - CPI, Conference Papers Index KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39573592?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Influence+of+5-+and+20-year+old+Phragmites+australis+populations+on+rates+of+accretion&rft.au=Rooth%2C+JE%3BStevenson%2C+J+C&rft.aulast=Rooth&rft.aufirst=JE&rft.date=2002-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: New Jersey Marine Science Consortium, Bldg. 22, Fort Hancock, Highlanads, NJ 07732, USA; phone: 732-872-1300; fax: 732-291-4483; URL: www.njmsc.org N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Modeling the 3-D density-driven circulation and salt transport in San Francisco Bay AN - 39501074; 3660462 AU - Smith, P Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 KW - CPI, Conference Papers Index KW - U 1200:Aquatic Science KW - U 4300:Environmental Science UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39501074?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Modeling+the+3-D+density-driven+circulation+and+salt+transport+in+San+Francisco+Bay&rft.au=Smith%2C+P&rft.aulast=Smith&rft.aufirst=P&rft.date=2002-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: University of Rhode Island, Graduate School of Oceanography, Narragansett Bay Campus, Narragansett, RI 02882, USA; phone: 727-367-2771; fax: 727-367-8082; URL: www.oce.uri.edu/ecm7 N1 - Last updated - 2010-05-03 ER - TY - CPAPER T1 - Role of invasive plant species in the changing face of wetland ecosystems AN - 39453628; 3665323 AU - Guntenspergen, G Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 KW - CPI, Conference Papers Index KW - U 2000:Biology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/39453628?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Acpi&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=conference&rft.jtitle=&rft.atitle=Role+of+invasive+plant+species+in+the+changing+face+of+wetland+ecosystems&rft.au=Guntenspergen%2C+G&rft.aulast=Guntenspergen&rft.aufirst=G&rft.date=2002-03-15&rft.volume=&rft.issue=&rft.spage=&rft.isbn=&rft.btitle=&rft.title=&rft.issn=&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Availability: New Jersey Marine Science Consortium, Bldg. 22, Fort Hancock, Highlanads, NJ 07732, USA; phone: 732-872-1300; fax: 732-291-4483; URL: www.njmsc.org N1 - Last updated - 2010-05-03 ER - TY - JOUR T1 - Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams, 1999-2000: A National Reconnaissance AN - 20072094; 5402313 AB - To provide the first nationwide reconnaissance of the occurrence of pharmaceuticals, hormones, and other organic wastewater contaminants (OWCs) in water resources, the U.S. Geological Survey used five newly developed analytical methods to measure concentrations of 95 OWCs in water samples from a network of 139 streams across 30 states during 1999 and 2000. The selection of sampling sites was biased toward streams susceptible to contamination (i.e. downstream of intense urbanization and livestock production). OWCs were prevalent during this study, being found in 80% of the streams sampled. The compounds detected represent a wide range of residential, industrial, and agricultural origins and uses with 82 of the 95 OWCs being found during this study. The most frequently detected compounds were coprostanol (fecal steroid), cholesterol (plant and animal steroid), N,N-diethyltoluamide (insect repellant), caffeine (stimulant), triclosan (antimicrobial disinfectant), tri(2-chloroethyl)phosphate (fire retardant), and 4-nonylphenol (nonionic detergent metabolite). Measured concentrations for this study were generally low and rarely exceeded drinking-water guidelines, drinking-water health advisories, or aquatic-life criteria. Many compounds, however, do not have such guidelines established. The detection of multiple OWCs was common for this study, with a median of seven and as many as 38 OWCs being found in a given water sample. Little is known about the potential interactive effects (such as synergistic or antagonistic toxicity) that may occur from complex mixtures of OWCs in the environment. In addition, results of this study demonstrate the importance of obtaining data on metabolites to fully understand not only the fate and transport of OWCs in the hydrologic system but also their ultimate overall effect on human health and the environment. JF - Environmental Science & Technology AU - Kolpin, D W AU - Furlong, E T AU - Meyer, M T AU - Thurman, E M AU - Zaugg, S D AU - Barber, L B AU - Buxton, H T AD - U.S. Geological Survey, 400 S. Clinton Street, Box 1230, Iowa City, Iowa 52244, USA, dwkolpin@usgs.gov Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 SP - 1202 EP - 1211 VL - 36 IS - 6 SN - 0013-936X, 0013-936X KW - 4-nonylphenol KW - USA KW - caffeine KW - cholesterol KW - coprostanol KW - hormones KW - triclosan KW - Microbiology Abstracts A: Industrial & Applied Microbiology; Pollution Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Aqualine Abstracts; Water Resources Abstracts KW - Water Pollution KW - Waste water disposal KW - Contamination KW - Detergents KW - Coprostanol KW - Chemical Analysis KW - Water resources KW - Hormones KW - Water Quality Standards KW - Data Collections KW - Freshwater pollution KW - Rivers KW - Surveys KW - Stimulants KW - Cholesterol KW - Streams (in natural channels) KW - Pharmaceuticals KW - River water pollution monitoring KW - Organic Compounds KW - Contaminants KW - Wastewater KW - Pollution monitoring KW - Water sampling KW - Urbanization KW - steroid cholesterol KW - Metabolites KW - Streams KW - Disinfectants KW - Caffeine KW - Sampling KW - Drugs KW - Pollutant Identification KW - Fires KW - Data processing KW - Pollution detection KW - Fate of Pollutants KW - Toxicity KW - Steroid hormones KW - Livestock KW - Antimicrobial agents KW - Wastewater discharges KW - Pharmaceutical chemicals KW - Organic compounds KW - Waste water KW - Pollution (Water) KW - Triclosan KW - A 01380:Plant Protection, Fungicides & Seed Treatments KW - M2 556.53:Rivers, Streams, Canals (556.53) KW - Q5 08503:Characteristics, behavior and fate KW - SW 3010:Identification of pollutants KW - P 2000:FRESHWATER POLLUTION KW - SW 3020:Sources and fate of pollution KW - AQ 00002:Water Quality UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/20072094?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Science+%26+Technology&rft.atitle=Pharmaceuticals%2C+Hormones%2C+and+Other+Organic+Wastewater+Contaminants+in+U.S.+Streams%2C+1999-2000%3A+A+National+Reconnaissance&rft.au=Kolpin%2C+D+W%3BFurlong%2C+E+T%3BMeyer%2C+M+T%3BThurman%2C+E+M%3BZaugg%2C+S+D%3BBarber%2C+L+B%3BBuxton%2C+H+T&rft.aulast=Kolpin&rft.aufirst=D&rft.date=2002-03-15&rft.volume=36&rft.issue=6&rft.spage=1202&rft.isbn=&rft.btitle=&rft.title=Environmental+Science+%26+Technology&rft.issn=0013936X&rft_id=info:doi/10.1021%2Fes011055j LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-09-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Rivers; Pollution monitoring; Pollution detection; Organic compounds; Waste water; Hormones; Drugs; Freshwater pollution; Fires; Data processing; Contamination; Urbanization; Detergents; steroid cholesterol; Water resources; Stimulants; Metabolites; Steroid hormones; Toxicity; Streams; Antimicrobial agents; Livestock; Disinfectants; Pharmaceuticals; Caffeine; Sampling; Contaminants; Triclosan; Waste water disposal; River water pollution monitoring; Water sampling; Wastewater discharges; Coprostanol; Cholesterol; Pharmaceutical chemicals; Pollution (Water); Streams (in natural channels); Wastewater; Pollutant Identification; Water Pollution; Water Quality Standards; Fate of Pollutants; Chemical Analysis; Surveys; Organic Compounds; Data Collections DO - http://dx.doi.org/10.1021/es011055j ER - TY - JOUR T1 - Changes to Monterey Bay beaches from the end of the 1982-83 El Nino through the 1997-98 El Nino AN - 18563186; 5354664 AB - The shoreline of Monterey Bay, CA, USA demarcates the landward extent of the Monterey Bay National Marine Sanctuary. Along the length of that shoreline, nine beaches were profiled 34 times between 1983 and 1998. The resulting data set provides an understanding of processes that affect beach volume, width, and shape. Monterey Bay, which is open to high-energy waves generated in the Pacific Ocean, comprises a range of beach environments that respond in a dramatic way to major storms such as the anomalously large El Ni n os in 1982-83 and 1997-98. This study relates the profile characteristics of the beaches to storminess, shoreline location, and geomorphic setting. Because the large El Ni n os occurred at the start and end of the study, the surveys cover both periods of nearly constant beach size and periods of extreme erosion, and the data show both the extent of erosion and accretion and the nature of the transition between the two periods. JF - Marine Geology AU - Dingler, J R AU - Reiss, TE AD - United States Geological Survey, Coastal and Marine Geology, 345 Middlefield Road, 94025 Menlo Park, CA USA Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 SP - 249 EP - 263 PB - Elsevier Science VL - 181 IS - 1-3 SN - 0025-3227, 0025-3227 KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts KW - M2 551.468:Coastal Oceanography (551.468) KW - O 3050:Sediment Dynamics KW - Q2 02264:Sediments and sedimentation KW - M2 551.588.16:Influence of sea surface temperature and currents on climate UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18563186?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+Geology&rft.atitle=Changes+to+Monterey+Bay+beaches+from+the+end+of+the+1982-83+El+Nino+through+the+1997-98+El+Nino&rft.au=Dingler%2C+J+R%3BReiss%2C+TE&rft.aulast=Dingler&rft.aufirst=J&rft.date=2002-03-15&rft.volume=181&rft.issue=1-3&rft.spage=249&rft.isbn=&rft.btitle=&rft.title=Marine+Geology&rft.issn=00253227&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Suspended sediment transport on the continental shelf near Davenport, California AN - 18560050; 5354660 AB - Suspended sediment transport on the shelves off Santa Cruz and Davenport, California is studied using field measurements and bottom boundary layer modeling. Strong transport events mostly occur during storms in winter; the volume of winter sediment transport is at least one order of magnitude greater than that of summer/spring transport. Rock outcrops on the inner shelf (<40 m of water) indicates an erosional environment, but an elongated mid-shelf mud deposit evidently suggests a depositional environment on the mid-shelf. The seafloor geology appears to correlate to the poleward and offshore sediment transport pattern. This study also suggests that suspended sediment moves out of Monterey Bay, roughly along the isobaths of the northern bay. This fine material, originally from river sources, and the material from the coastal cliff erosion that is subsequently introduced to the transport system through cross-shelf sediment transport, are believed to be the sources of the mid-shelf mud deposit. JF - Marine Geology AU - Xu, J P AU - Noble, M AU - Eittreim, S L AD - United States Geological Survey, 94025 Menlo Park, CA USA Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 SP - 171 EP - 193 PB - Elsevier Science VL - 181 IS - 1-3 SN - 0025-3227, 0025-3227 KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts KW - M2 551.463/.464:Seawater Properties (551.463/.464) KW - O 3050:Sediment Dynamics KW - Q2 02264:Sediments and sedimentation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18560050?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+Geology&rft.atitle=Suspended+sediment+transport+on+the+continental+shelf+near+Davenport%2C+California&rft.au=Xu%2C+J+P%3BNoble%2C+M%3BEittreim%2C+S+L&rft.aulast=Xu&rft.aufirst=J&rft.date=2002-03-15&rft.volume=181&rft.issue=1-3&rft.spage=171&rft.isbn=&rft.btitle=&rft.title=Marine+Geology&rft.issn=00253227&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Flow and sediment suspension events on the inner shelf of Central California AN - 1665489719; 5354661 AB - The US Geological Survey conducted a field experiment in the late spring and early summer of 1998 off northern Santa Cruz County, California, to study sediment fluxes along the central California shelf. As part of this study, a bottom-mounted instrument package was deployed in a sediment-filled paleo-stream channel (h=12 m) off a pocket beach to measure waves, currents, suspended-sediment concentration, temperature, salinity, and seabed-level changes. The observations of suspended-sediment concentration revealed intermittent, intense periods of sediment suspension near the bed that were associated with the passage of individual large waves or wave groups. We used an ensemble averaging technique to characterize the temporal structure of near-bed sediment suspension events (SSEs) defined as when the near-bed instantaneous concentration exceeded the mean by three standard deviations. During the 800 h of deployment, over 9500 SSEs occurred. The 3917 SSEs that began under onshore flow were found to have a different temporal structure than the 5650 events that began during offshore flow. The longer mean duration of the onshore flow events caused an average of 83% of the sediment suspended during the course of the events to be carried offshore after the reversal of flow. All of the sediment suspended during the offshore events was carried offshore due to the shorter mean duration of these events. SSEs are shown to contribute 12% on average and up to 95% of the total sediment suspended by mass, demonstrating the importance of these events to sediment transport in this type of environment. Suspended-sediment transport models developed for the shelf, which use the product of the mean current and the mean suspended-sediment concentration, cannot accurately model the magnitude and direction of suspended-sediment transport on this energetic inner shelf due to the lack of information regarding the instantaneous coupling between fluid flow and sediment suspension. We conclude that time-variant models must be used to accurately model suspended-sediment transport in this type of environment. JF - Marine Geology AU - Storlazzi, C D AU - Jaffe, B E AD - Coastal Geology and Imaging Laboratory, United States Geological Survey, Pacific Science Center, University of California, 1156 High Street, CA 95064-1077 Santa Cruz USA Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 SP - 195 EP - 213 PB - Elsevier Science VL - 181 IS - 1-3 SN - 0025-3227, 0025-3227 KW - Water Resources Abstracts; Meteorological & Geoastrophysical Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts KW - INE, USA, California, Central KW - Suspended matter transport KW - Physicochemical properties KW - Shelf sedimentation KW - Resuspended sediments KW - Coastal zone KW - INE, USA, California KW - Continental shelves KW - Continental shelf sediments KW - Marine sediment movement KW - Sediment transport KW - Ocean floor KW - Marine sediment transport KW - Fluid flow KW - INE, USA, California, Santa Cruz Cty. KW - M2 551.463.8:Suspensions and suspended particles in sea water (e.g. sediments, turbidity) (551.463.8) KW - Q2 09264:Sediments and sedimentation KW - M2 551.468:Coastal Oceanography (551.468) KW - O 3050:Sediment Dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665489719?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+Geology&rft.atitle=Flow+and+sediment+suspension+events+on+the+inner+shelf+of+Central+California&rft.au=Storlazzi%2C+C+D%3BJaffe%2C+B+E&rft.aulast=Storlazzi&rft.aufirst=C&rft.date=2002-03-15&rft.volume=181&rft.issue=1-3&rft.spage=195&rft.isbn=&rft.btitle=&rft.title=Marine+Geology&rft.issn=00253227&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Resuspended sediments; Coastal zone; Continental shelves; Physicochemical properties; Shelf sedimentation; Sediment transport; Ocean floor; Fluid flow; Suspended matter transport; Marine sediment movement; Continental shelf sediments; Marine sediment transport; INE, USA, California, Central; INE, USA, California; INE, USA, California, Santa Cruz Cty. ER - TY - JOUR T1 - Towards a sediment budget for the Santa Cruz shelf AN - 1665487816; 5354663 AB - A conceptual model is presented for the northern Monterey Bay continental shelf in which coarse sediment moves southward along the coast in the littoral zone while fine sediment moves to the north by advection and diffusion along the midshelf. Data from measurements and estimates of various sediment sources and sinks show that the midshelf mudbelt is the dominant sink for fine-grained sediment introduced into Monterey Bay. The principal sources of the fine sediment are the three rivers that enter Monterey Bay: the San Lorenzo, Pajaro and Salinas rivers. Accumulation rates in the midshelf mudbelt are high relative to documented yields of rivers and cliff erosion, and also are high relative to other documented mud accumulations of the west coast continental shelves. JF - Marine Geology AU - Eittreim, S L AU - Xu, J P AU - Noble, M AU - Edwards, B D AD - United States Geological Survey, 345 Middlefield Rd., 94025 Menlo Park, CA USA Y1 - 2002/03/15/ PY - 2002 DA - 2002 Mar 15 SP - 235 EP - 248 PB - Elsevier Science VL - 181 IS - 1-3 SN - 0025-3227, 0025-3227 KW - Water Resources Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Oceanic Abstracts KW - INE, USA, California, Santa Cruz KW - Marine KW - Coastal zone KW - Continental shelves KW - Shelf sedimentation KW - Sediment transport KW - Sedimentation KW - INE, USA, California, Santa Cruz Cty. KW - Littoral zone KW - Q2 09264:Sediments and sedimentation KW - O 3050:Sediment Dynamics UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/1665487816?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+Geology&rft.atitle=Towards+a+sediment+budget+for+the+Santa+Cruz+shelf&rft.au=Eittreim%2C+S+L%3BXu%2C+J+P%3BNoble%2C+M%3BEdwards%2C+B+D&rft.aulast=Eittreim&rft.aufirst=S&rft.date=2002-03-15&rft.volume=181&rft.issue=1-3&rft.spage=235&rft.isbn=&rft.btitle=&rft.title=Marine+Geology&rft.issn=00253227&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2015-03-24 N1 - SubjectsTermNotLitGenreText - Coastal zone; Continental shelves; Shelf sedimentation; Sediment transport; Sedimentation; Littoral zone; INE, USA, California, Santa Cruz; INE, USA, California, Santa Cruz Cty.; Marine ER - TY - JOUR T1 - Photochemical changes in cyanide speciation in drainage from a precious metal ore heap. AN - 71564993; 11918005 AB - In drainage from an inactive ore heap at a former gold mine, the speciation of cyanide and the concentrations of several metals were found to follow diurnal cycles. Concentrations of the hexacyanoferrate complex, iron, manganese, and ammonium were higher at night than during the day, whereas weak-acid-dissociable cyanide, silver, gold, copper, nitrite, and pH displayed the reverse behavior. The changes in cyanide speciation, iron, and trace metals can be explained by photodissociation of iron and cobalt cyanocomplexes as the solutions emerged from the heap into sunlight-exposed channels. At midday, environmentally significant concentrations of free cyanide were produced in a matter of minutes, causing trace copper, silver, and gold to be mobilized as cyanocomplexes from solids. Whether rapid photodissociation is a general phenomenon common to other sites will be important to determine in reaching a general understanding of the environmental risks posed by routine or accidental water discharges from precious metal mining facilities. JF - Environmental science & technology AU - Johnson, Craig A AU - Leinz, Reinhard W AU - Grimes, David J AU - Rye, Robert O AD - U.S. Geological Survey, Denver, Colorado 80225, USA. cjohnso@usgs.gov Y1 - 2002/03/01/ PY - 2002 DA - 2002 Mar 01 SP - 840 EP - 845 VL - 36 IS - 5 SN - 0013-936X, 0013-936X KW - Cyanides KW - 0 KW - Metals, Heavy KW - Water Pollutants KW - Index Medicus KW - Environmental Monitoring KW - Waste Disposal, Fluid KW - Hydrogen-Ion Concentration KW - Risk Assessment KW - Water Pollutants -- analysis KW - Cyanides -- analysis KW - Mining KW - Metals, Heavy -- analysis UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71564993?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Photochemical+changes+in+cyanide+speciation+in+drainage+from+a+precious+metal+ore+heap.&rft.au=Johnson%2C+Craig+A%3BLeinz%2C+Reinhard+W%3BGrimes%2C+David+J%3BRye%2C+Robert+O&rft.aulast=Johnson&rft.aufirst=Craig&rft.date=2002-03-01&rft.volume=36&rft.issue=5&rft.spage=840&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-27 N1 - Date created - 2002-03-28 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Evaluating remedial alternatives for an acid mine drainage stream: application of a reactive transport model. AN - 71553381; 11917996 AB - A reactive transport model based on one-dimensional transport and equilibrium chemistry is applied to synoptic data from an acid mine drainage stream. Model inputs include streamflow estimates based on tracer dilution, inflow chemistry based on synoptic sampling, and equilibrium constants describing acid/base, complexation, precipitation/dissolution, and sorption reactions. The dominant features of observed spatial profiles in pH and metal concentration are reproduced along the 3.5-km study reach by simulating the precipitation of Fe(III) and Al solid phases and the sorption of Cu, As, and Pb onto freshly precipitated iron(III) oxides. Given this quantitative description of existing conditions, additional simulations are conducted to estimate the streamwater quality that could result from two hypothetical remediation plans. Both remediation plans involve the addition of CaCO3 to raise the pH of a small, acidic inflow from approximately 2.4 to approximately 7.0. This pH increase results in a reduced metal load that is routed downstream by the reactive transport model, thereby providing an estimate of post-remediation water quality. The first remediation plan assumes a closed system wherein inflow Fe(II) is not oxidized by the treatment system; under the second remediation plan, an open system is assumed, and Fe(II) is oxidized within the treatment system. Both plans increase instream pH and substantially reduce total and dissolved concentrations of Al, As, Cu, and Fe(II+III) at the terminus of the study reach. Dissolved Pb concentrations are reduced by approximately 18% under the first remediation plan due to sorption onto iron(III) oxides within the treatment system and stream channel. In contrast, iron(III) oxides are limiting under the second remediation plan, and removal of dissolved Pb occurs primarily within the treatment system. This limitation results in an increase in dissolved Pb concentrations over existing conditions as additional downstream sources of Pb are not attenuated by sorption. JF - Environmental science & technology AU - Runkel, Robert L AU - Kimball, Briant A AD - U.S. Geological Survey, Denver, Colorado 80225, USA. runkel@usgs.gov Y1 - 2002/03/01/ PY - 2002 DA - 2002 Mar 01 SP - 1093 EP - 1101 VL - 36 IS - 5 SN - 0013-936X, 0013-936X KW - Metals, Heavy KW - 0 KW - Iron KW - E1UOL152H7 KW - Index Medicus KW - Oxidation-Reduction KW - Environmental Monitoring KW - Hydrogen-Ion Concentration KW - Water Movements KW - Waste Disposal, Fluid KW - Iron -- chemistry KW - Water Pollution -- prevention & control KW - Models, Chemical KW - Mining UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71553381?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+science+%26+technology&rft.atitle=Evaluating+remedial+alternatives+for+an+acid+mine+drainage+stream%3A+application+of+a+reactive+transport+model.&rft.au=Runkel%2C+Robert+L%3BKimball%2C+Briant+A&rft.aulast=Runkel&rft.aufirst=Robert&rft.date=2002-03-01&rft.volume=36&rft.issue=5&rft.spage=1093&rft.isbn=&rft.btitle=&rft.title=Environmental+science+%26+technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-27 N1 - Date created - 2002-03-28 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - It's a Bad Thing to Make One Thing into Two: Disciplinary Distinctions as Trained Incapacities AN - 60458488; 200306917 AB - Eighteenth-century Japanese Samurai wisdom dictates that It is a bad thing when one thing becomes two. This wisdom is an organizing premise for the argument that the distinction between environmental sociology & sociology of natural resources is artificial & counterproductive. Distinctions between these subdisciplines are described as "trained incapacities" resulting from specialized training that narrows scientists' range of perception & reduces their effectiveness. The analysis uses the concept of postnormal science to illustrate that many modern environmental problems are too complex & ambiguous for science alone to solve. Specifically, the ordinary practice of science is unprepared to include significant uncertainties & cultural values in analyses. We argue for a merging of subdisciplines to create a new "life science" that reaffirms a commitment to understanding how social forces interact with biological forces & the physical environment. 1 Figure, 29 References. Adapted from the source document. JF - Society and Natural Resources AU - Rosa, Eugene A AU - Machlis, Gary E AD - c/o Machlis -- National Park Service, Dept Interior, Washington, DC Y1 - 2002/03// PY - 2002 DA - March 2002 SP - 251 EP - 261 VL - 15 IS - 3 SN - 0894-1920, 0894-1920 KW - natural resource sociology KW - Natural Resources KW - Scientific Research KW - Environmental Sociology KW - Sociological Research KW - Applied Sociology KW - Academic Disciplines KW - Human Ecology KW - Specialization KW - Interdisciplinary Approach KW - article KW - 0206: sociology: history and theory; history & present state of sociology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/60458488?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Asocabs&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Society+and+Natural+Resources&rft.atitle=It%27s+a+Bad+Thing+to+Make+One+Thing+into+Two%3A+Disciplinary+Distinctions+as+Trained+Incapacities&rft.au=Rosa%2C+Eugene+A%3BMachlis%2C+Gary+E&rft.aulast=Rosa&rft.aufirst=Eugene&rft.date=2002-03-01&rft.volume=15&rft.issue=3&rft.spage=251&rft.isbn=&rft.btitle=&rft.title=Society+and+Natural+Resources&rft.issn=08941920&rft_id=info:doi/ LA - English DB - Sociological Abstracts N1 - Date revised - 2007-04-01 N1 - Last updated - 2016-09-28 N1 - CODEN - SNREEI N1 - SubjectsTermNotLitGenreText - Environmental Sociology; Natural Resources; Academic Disciplines; Specialization; Sociological Research; Scientific Research; Human Ecology; Interdisciplinary Approach; Applied Sociology ER - TY - JOUR T1 - Origin of carbon dioxide gas contamination in groundwater and building spaces in western Pennsylvania; implications for subsurface carbon sequestration AN - 51848110; 2004-037692 AB - Subsurface CO (sub 2) sequestration involves three potential carbon storage reservoirs: 1) petroleum reservoirs; 2) coal seams; and 3) deep brine aquifers. Assuring the environmental safety of CO (sub 2) storage in the subsurface is critical. Sequestered CO (sub 2) might migrate and contaminate drinking water or accumulate as free gas in buildings. Investigations of CO (sub 2) migration from subsurface sources in western Pennsylvania are relevant to research with CO (sub 2) sequestration. There are several possible sources of CO (sub 2) in the petroleum and coal fields there and it is crucial to recognize these before storing CO (sub 2) underground. Carbon isotope geochemistry, in combination with site-specific geologic studies, can help specify source. These techniques are useful for establishing baseline data for CO (sub 2) sequestration and for discriminating this gas from other sources of CO (sub 2) . A case study from Lawrence County, Pennsylvania is instructive. Here, CO (sub 2) from a subsurface source contaminated ground water and building space at several private residences. Over 25% CO (sub 2) was measured in the air above the water table in monitoring wells, and ambient CO (sub 2) in the homes exceeded 14% during low barometric pressure episodes. Potential sources of the CO (sub 2) included organic matter and carbonate in spoil from a strip mining operation, an abandoned deep coal mine, reactions of AMD from the mine with carbonate in bedrock, the spoil and/or local glacial till, active deep gas wells, and an abandoned oil field. The delta (super 13) CO (sub 2) of the contaminant ranged from -7.01 to +2.86 permil indicating a carbonate source for the gases. The site-specific investigation suggested that AMD reacting with carbonate in the glacial till was the source of the gas. JF - Abstracts with Programs - Geological Society of America AU - Laughrey, Christopher D AU - Baldassare, Fred AU - Ehler, William C AU - Rathburn, Steve AU - Anonymous Y1 - 2002/03// PY - 2002 DA - March 2002 SP - 37 EP - 38 PB - Geological Society of America (GSA), Boulder, CO VL - 34 IS - 2 SN - 0016-7592, 0016-7592 KW - United States KW - North America KW - water supply KW - sequestration KW - pollutants KW - natural gas KW - pollution KW - Appalachians KW - petroleum KW - Appalachian Plateau KW - drinking water KW - ground water KW - carbon dioxide KW - mitigation KW - conservation KW - Lawrence County Pennsylvania KW - coalbed methane KW - Pennsylvania KW - western Pennsylvania KW - 22:Environmental geology UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51848110?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Abstracts+with+Programs+-+Geological+Society+of+America&rft.atitle=Origin+of+carbon+dioxide+gas+contamination+in+groundwater+and+building+spaces+in+western+Pennsylvania%3B+implications+for+subsurface+carbon+sequestration&rft.au=Laughrey%2C+Christopher+D%3BBaldassare%2C+Fred%3BEhler%2C+William+C%3BRathburn%2C+Steve%3BAnonymous&rft.aulast=Laughrey&rft.aufirst=Christopher&rft.date=2002-03-01&rft.volume=34&rft.issue=2&rft.spage=37&rft.isbn=&rft.btitle=&rft.title=Abstracts+with+Programs+-+Geological+Society+of+America&rft.issn=00167592&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - Geological Society of America, Southeastern Section, 51st annual meeting; Geological Society of America, North-Central Section, 36th annual meeting N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States N1 - Date revised - 2004-01-01 N1 - PubXState - CO N1 - Last updated - 2012-06-07 N1 - CODEN - GAAPBC N1 - SubjectsTermNotLitGenreText - Appalachian Plateau; Appalachians; carbon dioxide; coalbed methane; conservation; drinking water; ground water; Lawrence County Pennsylvania; mitigation; natural gas; North America; Pennsylvania; petroleum; pollutants; pollution; sequestration; United States; water supply; western Pennsylvania ER - TY - JOUR T1 - Coalbed methane in Northern Alaska; potential resources for rural use and added supply for the proposed Trans-Alaska gas pipeline AN - 51706457; 2005-046009 AB - Coalbed methane (CBM) in northern Alaska is important because of the need for affordable, local energy sources in remote communities and because of the potential addition of gas supplies for the proposed trans-Alaska gas pipeline. In the western Colville sub-basin of the North Slope Basin, the Cretaceous Nanushuk Formation contains up to 150 coal seams ranging in thickness from five to 28 ft over a 40,000 mi (super 2) area. Near Wainwright, Nanushuk coals have a 0.4 to 0.5% mean random vitrinite reflectance (Rv-r) at the surface and this increases to about 0.6% Rv-r at 2000 ft depth. At this depth, adsorption isotherm analysis indicates a gas storage capacity of 80 scf/ton (as received basis) if the coal is gas-saturated. The North Slope Basin also contains Late Cretaceous to Tertiary Sagavanirktok Formation coals, with beds up to 30 ft thick and net coal thickness locally exceeding 150 ft. Geophysical logs indicate Sagavanirktok coals underlie about 2000 mi (super 2) between the Prudhoe Bay area and outcrops 70 miles to the south. Sagavanirktok coals are about 0.3%Rv-r at the surface and increase to near 0.6% Rv-r at 6000 ft depth in the Prudhoe Bay area. Preliminary resource calculations indicate a geologic potential of about 800 TCF of CBM in the North Slope Basin. By comparison, proven conventional natural gas reserves in the North Slope basin are only 31 TCF. Thus, the capacity of the proposed gas pipeline needs to be designed to handle potential CBM supplies as well as conventional gas. JF - Annual Meeting Expanded Abstracts - American Association of Petroleum Geologists AU - Barker, Charles E AU - Clough, James G AU - Roberts, Stephen B AU - Fisk, Bob AU - Anonymous Y1 - 2002/03// PY - 2002 DA - March 2002 SP - 13 PB - American Association of Petroleum Geologists and Society of Economic Paleontologists and Mineralogists (AAPG), Tulsa, OK VL - 2002 SN - 0094-0038, 0094-0038 KW - United States KW - resources KW - Cretaceous KW - vitrinite KW - natural gas KW - Colville River delta KW - petroleum KW - Prudhoe Bay KW - pipelines KW - Cenozoic KW - sedimentary rocks KW - Nanushuk Group KW - energy sources KW - coal KW - basins KW - thickness KW - stratigraphic units KW - macerals KW - well logs KW - North Slope KW - geophysical methods KW - Mesozoic KW - Tertiary KW - Northern Alaska KW - Trans-Alaska Pipeline KW - coalbed methane KW - Alaska KW - Sagavanirktok Formation KW - 29A:Economic geology, geology of energy sources UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/51706457?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Ageorefmodule&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Annual+Meeting+Expanded+Abstracts+-+American+Association+of+Petroleum+Geologists&rft.atitle=Coalbed+methane+in+Northern+Alaska%3B+potential+resources+for+rural+use+and+added+supply+for+the+proposed+Trans-Alaska+gas+pipeline&rft.au=Barker%2C+Charles+E%3BClough%2C+James+G%3BRoberts%2C+Stephen+B%3BFisk%2C+Bob%3BAnonymous&rft.aulast=Barker&rft.aufirst=Charles&rft.date=2002-03-01&rft.volume=2002&rft.issue=&rft.spage=13&rft.isbn=&rft.btitle=&rft.title=Annual+Meeting+Expanded+Abstracts+-+American+Association+of+Petroleum+Geologists&rft.issn=00940038&rft_id=info:doi/ LA - English DB - GeoRef N1 - Conference title - AAPG annual convention with SEPM N1 - Copyright - GeoRef, Copyright 2012, American Geosciences Institute. Reference includes data supplied by American Association of Petroleum Geologists, Tulsa, OK, United States N1 - Date revised - 2005-01-01 N1 - PubXState - OK N1 - Last updated - 2012-06-07 N1 - CODEN - APGAB2 N1 - SubjectsTermNotLitGenreText - Alaska; basins; Cenozoic; coal; coalbed methane; Colville River delta; Cretaceous; energy sources; geophysical methods; macerals; Mesozoic; Nanushuk Group; natural gas; North Slope; Northern Alaska; petroleum; pipelines; Prudhoe Bay; resources; Sagavanirktok Formation; sedimentary rocks; stratigraphic units; Tertiary; thickness; Trans-Alaska Pipeline; United States; vitrinite; well logs ER - TY - JOUR T1 - Sediment denitrification in the Gulf of Mexico zone of hypoxia AN - 18909831; 5648253 AB - The largest zone of anthropogenic bottom water hypoxia in the Western Hemisphere occurs seasonally in the northern Gulf of Mexico between the Mississippi River delta and the coast of eastern Texas. This zone of hypoxia reaches its greatest extent in the summer months and is a consequence of seasonal stratification of the water column combined with the decomposition of organic matter derived from accelerated rates of primary production. This enhanced productivity is driven primarily by the input of inorganic nitrogen from the Mississippi River. There are 3 likely sinks for fixed nitrogen within this zone of hypoxia: sequestration in the sediment, dispersion and dilution into the Gulf of Mexico, and denitrification. We assessed potential denitrification rates at 7 stations in the zone of hypoxia during the summer of 1999. Those data are compared with bottom water nitrate, ammonium and dissolved oxygen (DO) concentrations. No denitrification was observed in the water column. Denitrification potential rates in the surface sediments were unexpectedly low and ranged between 39.8 and 108.1 mu mol/m super(2)/h. The highest rates were observed at stations with bottom water DO concentrations between 1 and 3 mg/L. Denitrification activity was significantly lower at stations where DO was lower than 1 mg/L or higher than 3 mg/L. Nutrient data for these stations demonstrate that as anoxia is approached, the dominant species of nitrogen shifts from nitrate to ammonium. The shift in nitrogen species suggests competition between microbial populations in the sediment community. The lower denitrification rates at stations with bottom water DO <1 mg/L may be due to nitrate limitation or an increase in the competitive advantage of microorganisms capable of dissimilatory nitrate reduction to ammonium (DNRA). Suppression of denitrification at low DO by any mechanism will increase the residence time of bioavailable nitrogen. This trend could act as a positive feedback mechanism in the formation of hypoxic bottom waters. JF - Marine ecology progress series AU - Childs, C R AU - Rabalais, N N AU - Turner, R E AU - Proctor, L M AD - US Geological Survey, National Research Program, Water Resources Division, MS 430, 12201 Sunrise Valley Drive, Reston, VA 20192 USA, Improcto@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 285 EP - 290 VL - 240 SN - 0171-8630, 0171-8630 KW - ASFA 3: Aquatic Pollution & Environmental Quality; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Marine KW - Sediment chemistry KW - Bottom water KW - Nitrates KW - Eutrophication KW - Anthropogenic factors KW - ASW, USA, Gulf Coast KW - ASW, USA, Louisiana, Mississippi Delta KW - Deltas KW - Coastal waters KW - Primary production KW - Dissolved oxygen KW - Core analysis KW - ASW, Mexico Gulf KW - Anoxic sediments KW - ASW, USA, Texas KW - Anoxic conditions KW - Denitrification KW - Nitrogen cycle KW - Nitrogen KW - Ammonium compounds KW - Q5 08503:Characteristics, behavior and fate KW - Q1 08482:Ecosystems and energetics KW - O 1080:Multi-disciplinary Studies UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18909831?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+ecology+progress+series&rft.atitle=Sediment+denitrification+in+the+Gulf+of+Mexico+zone+of+hypoxia&rft.au=Childs%2C+C+R%3BRabalais%2C+N+N%3BTurner%2C+R+E%3BProctor%2C+L+M&rft.aulast=Childs&rft.aufirst=C&rft.date=2002-03-01&rft.volume=240&rft.issue=&rft.spage=285&rft.isbn=&rft.btitle=&rft.title=Marine+ecology+progress+series&rft.issn=01718630&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Physical medium: Printed matter N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Sediment chemistry; Bottom water; Nitrates; Eutrophication; Anthropogenic factors; Deltas; Coastal waters; Primary production; Core analysis; Dissolved oxygen; Anoxic sediments; Anoxic conditions; Denitrification; Nitrogen cycle; Ammonium compounds; Nitrogen; ASW, Mexico Gulf; ASW, USA, Texas; ASW, USA, Gulf Coast; ASW, USA, Louisiana, Mississippi Delta; Marine ER - TY - JOUR T1 - Sea otter population status and the process of recovery from the 1989 Exxon Valdez´oil spill AN - 18862261; 5695789 AB - Sea otter Enhydra lutris populations were severely affected by the 1989 'Exxon Valdez' oil spill in western Prince William Sound, AK, and had not fully recovered by 2000. Here we present results of population surveys and incorporate findings from related studies to identify current population status and factors affecting recovery. Between 1993 and 2000, the number of sea otters in the spill-area of Prince William Sound increased by about 600 to nearly 2700. However, at Knight Island, where oil exposure and sea otter mortality in 1989 was most severe, no increase has been observed. Sea otter reproduction was not impaired, and the age and sex composition of captured otters are consistent with both intrinsic reproduction and immigration contributing to recovery. However, low resighting rates of marked otters at Knight Island compared to an unoiled reference area, and high proportions of young otters in beach cast carcasses through 1998, suggest that the lack of recovery was caused by relatively poor survival or emigration of potential recruits. Significantly higher levels of cytochrome P4501A (CYP1A), a biomarker of hydrocarbons, were found in sea otters at Knight Island from 1996 to 1998 compared to unoiled Montague Island, implicating oil effects in the lack of recovery at Knight Island. Delayed recovery does not appear to be directly related to food limitation. Although food availability was relatively low at both oiled and unoiled areas, we detected significant increases in sea otter abundance only at Montague Island, a finding inconsistent with food as a principal limiting factor. Persistent oil in habitats and prey provides a source of continued oil exposure and, combined with relatively low prey densities, suggests a potential interaction between oil and food. However, sea otters foraged more successfully at Knight Island and young females were in better condition than those at Montague Island. We conclude that progress toward recovery of sea otters in Prince William Sound is evident, but that in areas where initial oil effects were greatest, recovery may be constrained by residual spill effects, resulting from elevated mortality and emigration. It is evident that internal reproduction and immigration of juveniles has been the primary means of population recovery, as opposed to broad scale redistribution of adults from outside affected areas. The result is a recovery period protracted by long-term spill effects on survival and emigration and intrinsic limits to population growth. JF - Marine ecology progress series AU - Bodkin, J L AU - Ballachey, B E AU - Dean, T A AU - Fukuyama, A K AU - Jewett, S C AU - McDonald, L AU - Monson, D H AU - Clair, CEO AU - VanBlaricom, G R AD - US Geological Survey, Alaska Science Center, 1011 East Tudor Road, Anchorage, AK 92083 USA, james_bodkin@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 237 EP - 253 VL - 241 SN - 0171-8630, 0171-8630 KW - Sea otter KW - Oceanic Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality KW - Marine KW - Cytochromes KW - Age composition KW - Sex ratio KW - Annual variations KW - Abundance KW - Survival KW - Food availability KW - Enhydra lutris KW - Oil pollution KW - Reproduction KW - INE, USA, Alaska, Alaska Gulf, Prince William Sound KW - Oil spills KW - O 4020:Pollution - Organisms/Ecology/Toxicology KW - Q5 08504:Effects on organisms UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18862261?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Marine+ecology+progress+series&rft.atitle=Sea+otter+population+status+and+the+process+of+recovery+from+the+1989+Exxon+Valdez%C2%B4oil+spill&rft.au=Bodkin%2C+J+L%3BBallachey%2C+B+E%3BDean%2C+T+A%3BFukuyama%2C+A+K%3BJewett%2C+S+C%3BMcDonald%2C+L%3BMonson%2C+D+H%3BClair%2C+CEO%3BVanBlaricom%2C+G+R&rft.aulast=Bodkin&rft.aufirst=J&rft.date=2002-03-01&rft.volume=241&rft.issue=&rft.spage=237&rft.isbn=&rft.btitle=&rft.title=Marine+ecology+progress+series&rft.issn=01718630&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - SuppNotes - Physical medium: Printed matter; Includes 85 refs N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Cytochromes; Age composition; Sex ratio; Annual variations; Abundance; Survival; Reproduction; Food availability; Oil pollution; Oil spills; Enhydra lutris; INE, USA, Alaska, Alaska Gulf, Prince William Sound; Marine ER - TY - JOUR T1 - Conservation Status Of The Buff-Breasted Sandpiper: Historic And Contemporary Distribution And Abundance In South America AN - 18593947; 5460104 AB - We present historic and contemporary information on the distribution and abundance of Buff-breasted Sandpipers (Tryngites subruficollis) in South America. Historic information was collated from the literature, area ornithologists, and museums, whereas contemporary data were derived from surveys conducted throughout the main wintering range in Argentina, Uruguay, and Brazil during the austral summers of 1999 and 2001. Variable circular plot sampling was used to estimate population densities. During 1999, the highest concentration of Buff-breasted Sandpipers in Argentina was in southern Bahia Samborombon (General Lavalle District) and areas north of Mar Chiquita coastal lagoon. During 2001, the highest concentrations in Brazil were at Ilha da Torotama and Lagoa do Peixe National Park. During 1999 and 2001, the highest concentrations of Buff-breasted Sandpipers in Uruguay were found along three lagoons (Laguna de Rocha, Laguna de Castillos, and Laguna Garzon) bordering the Atlantic Ocean. Population densities (birds/ha) of Buff-breasted Sandpipers were 0.11 (95% C.I. = 0.04-0.31) in Argentina, 1.62 (0.67-3.93) in Brazil, and 1.08 (0.37-3.18) in Uruguay. High turnover rates at survey sites, due to the formation of large, mobile flocks, contributed to moderately large confidence intervals around our population density estimates. Nevertheless, compared with historic accounts of Buff-breasted Sandpipers, our survey data indicate the population size of this species has declined substantially since the late 1800s and contemporary information suggests the species has continued to decline during the past three decades. Buff-breasted Sandpipers were found almost exclusively in pasturelands and appear to depend heavily upon intensive grazing by livestock, which maintain suitable short grass conditions. We discuss the need for protection of critical areas and proper range management to ensure appropriate habitat remains available for the species, and provide suggestions for future research needs. JF - Wilson Bulletin AU - Lanctot, ARB AU - Blanco, DE AU - Dias, R A AU - Isacch, J P AU - Gill, V A AU - Almeida, J B AU - Delhey, K AU - Petracci, P F AU - Bencke, G A AU - Balbueno, R A AD - USGS Alaska Science Center, 1011 East Tudor Rd., Anchorage, AK 99503, USA, richard_lanctot@fws.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 44 EP - 72 PB - The Wilson Ornithological Society VL - 114 IS - 1 SN - 0043-5643, 0043-5643 KW - Buff-breasted sandpiper KW - population declines KW - ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts KW - Biogeography KW - Abundance KW - Uruguay KW - Habitat KW - Environmental protection KW - South America KW - Argentina KW - Brazil KW - Historical ecology KW - Population status KW - Nature conservation KW - Conservation KW - Tryngites subruficollis KW - Aquatic birds KW - Population number KW - Q5 08523:Conservation, wildlife management and recreation KW - Q1 08362:Geographical distribution KW - Q1 08442:Population dynamics KW - D 04705:Conservation UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18593947?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wilson+Bulletin&rft.atitle=Conservation+Status+Of+The+Buff-Breasted+Sandpiper%3A+Historic+And+Contemporary+Distribution+And+Abundance+In+South+America&rft.au=Lanctot%2C+ARB%3BBlanco%2C+DE%3BDias%2C+R+A%3BIsacch%2C+J+P%3BGill%2C+V+A%3BAlmeida%2C+J+B%3BDelhey%2C+K%3BPetracci%2C+P+F%3BBencke%2C+G+A%3BBalbueno%2C+R+A&rft.aulast=Lanctot&rft.aufirst=ARB&rft.date=2002-03-01&rft.volume=114&rft.issue=1&rft.spage=44&rft.isbn=&rft.btitle=&rft.title=Wilson+Bulletin&rft.issn=00435643&rft_id=info:doi/10.1043%2F0043-5643%282002%29114%280044%3ACSOTBB%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Biogeography; Abundance; Nature conservation; Habitat; Aquatic birds; Environmental protection; Population number; Historical ecology; Population status; Conservation; Tryngites subruficollis; South America; Argentina; Brazil; Uruguay DO - http://dx.doi.org/10.1043/0043-5643(2002)114(0044:CSOTBB)2.0.CO;2 ER - TY - JOUR T1 - Source of solutes to the coastal sabkha of Abu Dhabi AN - 18563204; 5369640 AB - An ascending-brine model is proposed to address the observed isotope geochemistry, solute composition, and solute and water fluxes in the coastal sabkha of the Emirate of Abu Dhabi. Mass-balance measurements document that >95% of the solutes are derived from ascending continental brines; minor amounts are derived from rainfall and from groundwater entering from up-gradient areas. Nearly 100% of the annual water loss is from evaporation and not lateral discharge. Direct rainfall on the sabkha and subsequent recharge to the underlying aquifer account for similar to 90% of the annual water input to the system; the remaining 10% comes from both lateral and ascending groundwater flow. Thus, the water and solutes in this system are from different sources. Solute concentrations of conservative (i.e., nonreactive) elements in the coastal, sabkha-covered aquifer are consistent with the fluid pore volumes of ascending brine calculated from hydrologic properties. Calcium to sulfate ratios and sulfur isotopes are consistent with this source of solute from the underlying Tertiary formations. Recharging rainwater dissolves halite and other soluble minerals on the surface, causing the solution to become more dense and sink to the bottom of the aquifer where it vertically mixes with less dense ascending brines. Solutes are returned to the surface by capillary forces and recycled or lost from the system by eolian or fluvial processes. Thus, the system becomes vertically mixed, consistent with the presence of tritium throughout the aquifer; but there is essentially no horizontal mixing of seawater with groundwater. The observed seawater solutes in the supratidal zone come from interstitial seawater trapped by the rapid progradation of the sediments into the Arabian Gulf and are not refluxed or laterally mixed. The ascending-brine model contrasts significantly with both the seawater-flooding and evaporative-pumping models previously proposed as a source of solutes to the coastal sabkha of the Emirate of Abu Dhabi. Use of these earlier models leads to incorrect conclusions and raises serious questions about their applicability in the evaluation of sabkhat in the geologic record. JF - Bulletin of the Geological Society of America AU - Wood, W W AU - Sanford, W E AU - Al Habshi, ARS AD - U.S. Geological Survey, M.S. 430 National Center, Reston, Virginia 20192, USA, wwwood@usgs.gov Y1 - 2002/03// PY - 2002 DA - March 2002 SP - 259 EP - 268 VL - 114 IS - 3 SN - 0016-7606, 0016-7606 KW - United Arab Emirates, Abu Dhabi KW - Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Oceanic Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources KW - Saline-freshwater Interfaces KW - Aquifers KW - Chemical composition KW - Sabkhas KW - Geochemistry KW - Model Studies KW - Solutes KW - Coastal zone KW - Solute transport by groundwater KW - Ground water KW - Hydrology KW - Geology KW - Solute transport in marine sediments KW - Groundwater KW - Fluid flow KW - Coastal sediment transport KW - Brines KW - O 2010:Physical Oceanography KW - SW 0880:Chemical processes KW - M2 551.464.6:Special elements and inorganic compounds. Methods and results KW - Q2 09184:Composition of water UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18563204?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bulletin+of+the+Geological+Society+of+America&rft.atitle=Source+of+solutes+to+the+coastal+sabkha+of+Abu+Dhabi&rft.au=Wood%2C+W+W%3BSanford%2C+W+E%3BAl+Habshi%2C+ARS&rft.aulast=Wood&rft.aufirst=W&rft.date=2002-03-01&rft.volume=114&rft.issue=3&rft.spage=259&rft.isbn=&rft.btitle=&rft.title=Bulletin+of+the+Geological+Society+of+America&rft.issn=00167606&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Last updated - 2016-06-22 N1 - SubjectsTermNotLitGenreText - Solutes; Coastal zone; Chemical composition; Sabkhas; Ground water; Hydrology; Fluid flow; Brines; Solute transport by groundwater; Solute transport in marine sediments; Coastal sediment transport; Aquifers; Saline-freshwater Interfaces; Geochemistry; Geology; Groundwater; Model Studies ER - TY - JOUR T1 - Description Of Nests, Eggs, And Nestlings Of The Endangered Nightingale Reed-Warbler On Saipan, Micronesia AN - 18495626; 5460087 AB - We describe the first verified nests, eggs, and nestlings of the Nightingale Reed-Warbler (Acrocephalus luscinia), an endangered species endemic to the Mariana Islands, Micronesia. Nest composition, nest dimensions, and eggs were studied on the island of Saipan. Nests were located within three habitat types: upland introduced tangantangan (Leucaena leucocephala) forest, a native mangrove (Bruguiera gymnorrhiza) wetland, and a native reed (Phragmites karka) wetland. Nesting substrates included five native and two introduced tree species and one native reed species. Nests were composed primarily of dry vine stems, needle-like branchlets of ironwood (Casuarina equisetifolia), and tangantangan petioles. Nests were compact to bulky in construction and were secured to a forked arrangement of branches or stems. The background color of eggs ranged from white to cream to ivory-buff. Eggs were spotted, speckled, and blotched with gray, brown, black, and rust colored markings. Clutch size was 2-4, with a mode of two. Hatchlings were altricial with closed eyelids and devoid of natal down with dark gray to black skin. Nestlings examined prior to fledging resembled the adult plumage, except for the lack of the yellow supercilium found in adults. The nests and eggs have some characteristics similar to those of other Acrocephaline warblers found throughout Micronesia and Polynesia. JF - Wilson Bulletin AU - Mosher, S M AU - Fancy, S G AD - USGS Pacific Island Ecosystems Research Center, P.O. Box 44, Hawaii National Park, HI 96718-0044, USA, noca_68@yahoo.com Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 1 EP - 10 PB - The Wilson Ornithological Society VL - 114 IS - 1 SN - 0043-5643, 0043-5643 KW - Nightingale reed-warbler KW - Ecology Abstracts KW - D 04671:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18495626?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wilson+Bulletin&rft.atitle=Description+Of+Nests%2C+Eggs%2C+And+Nestlings+Of+The+Endangered+Nightingale+Reed-Warbler+On+Saipan%2C+Micronesia&rft.au=Mosher%2C+S+M%3BFancy%2C+S+G&rft.aulast=Mosher&rft.aufirst=S&rft.date=2002-03-01&rft.volume=114&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Wilson+Bulletin&rft.issn=00435643&rft_id=info:doi/10.1043%2F0043-5643%282002%29114%280001%3ADONEAN%292.0.CO%3B2 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1043/0043-5643(2002)114(0001:DONEAN)2.0.CO;2 ER - TY - JOUR T1 - Native American impacts on fire regimes of the California coastal ranges AN - 18408062; 5391508 AB - Native American burning impacts on California shrubland dominated landscapes are evaluated relative to the natural lightning fire potential for affecting landscape patterns. Focus was on the coastal ranges of central and southern California. Potential patterns of Indian burning were evaluated based upon historical documents, ethnographic accounts, archaeological records and consideration of contemporary land management tactics. Patterns of vegetation distribution in this region were evaluated relative to environmental factors and the resilience of the dominant shrub vegetation to different fire frequencies. Lightning fire frequency in this region is one of the lowest in North America and the density of pre-Columbian populations was one of the highest. Shrublands dominate the landscape throughout most of the region. These woody communities have weak resilience to high fire frequency and are readily displaced by annual grasses and forbs under high fire frequency. Intact shrublands provided limited resources for native Americans and thus there was ample motivation for using fire to degrade this vegetation to an open mosaic of shrubland/grassland, not unlike the agropastoral modification of ecologically related shrublands by Holocene peoples in the Mediterranean Basin. Alien-dominated grasslands currently cover approximately one-quarter of the landscape and less than 1% of these grasslands have a significant native grass presence. Ecological studies in the Californian coastal ranges have failed to uncover any clear soil or climate factors explaining grassland and shrubland distribution patterns. Coastal ranges of California were regions of high Indian density and low frequency of lightning fires. The natural vegetation dominants on this landscape are shrubland vegetation that often form dense impenetrable stands with limited resources for Native Americans. Natural fire frequencies are not high enough to maintain these landscapes in habitable mixtures of shrublands and grasslands but such landscape mosaics are readily produced with additional human subsidy of ignitions. It is hypothesized that a substantial fraction of the landscape was type converted from shrubland to grassland and much of the landscape that underwent such type conversion has either been maintained by Euro-American land management practices or resisted recolonization of native shrublands. It appears that these patterns are disturbance dependent and result from anthropogenic alteration of landscapes initiated by Native Americans and sustained and expanded upon by Euro-American settlers. JF - Journal of Biogeography AU - Keeley, JE AD - US Geological Survey, Western Ecological Research Center, Sequoia-Kings Canyon National Parks, Three Rivers, CA 93271, USA, jon_keeley@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 303 EP - 320 VL - 29 IS - 3 SN - 0305-0270, 0305-0270 KW - Ecology Abstracts KW - D 04100:Terrestrial ecosystems - general UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18408062?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Biogeography&rft.atitle=Native+American+impacts+on+fire+regimes+of+the+California+coastal+ranges&rft.au=Keeley%2C+JE&rft.aulast=Keeley&rft.aufirst=JE&rft.date=2002-03-01&rft.volume=29&rft.issue=3&rft.spage=303&rft.isbn=&rft.btitle=&rft.title=Journal+of+Biogeography&rft.issn=03050270&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Nesting Ecology of Saltmarsh Sharp-tailed Sparrows in a tidally restricted salt marsh AN - 18397576; 5385091 AB - We investigated population size, nest success, and nest-site characteristics of Saltmarsh Sharp-tailed Sparrows (Ammodramus caudacutus) from 1993 to 1998 in a salt marsh near Galilee, Rhode Island. From 1956 to 1997, tidal flow was restricted in the marsh by construction of a road with small culverts, which resulted in conversion of the marsh from short- and tall-form cordgrass (Spartina alterniflora) and marsh hay (S. patens) to one dominated by >5 m tall common reed (Phragmites australis). In fall 1997, self-regulating tide gates were installed to restore the historic tidal regime and vegetation. We documented declines in adult sparrow population sizes (17-25% annual decline) and productivity (48% annual decline) while the tidal regime was restricted. Nest success was variable (10-83%) before 1998, with predators accounting for most nest losses. Saltmarsh Sharp-tailed Sparrows usually nested in marsh hay, short-form cordgrass, and short common reed. After restoration, sparrows nested where vegetation was taller, which permitted greater nest elevation. However, 91% of nests failed due to flooding following installation of new tide gates. We hypothesize that restoration efforts will have short-term negative impacts on Saltmarsh Sharp-tailed Sparrow populations until salt marsh habitats are restored in higher sections of the marsh. JF - Wetlands AU - DiQuinzio, DA AU - Paton, PWC AU - Eddleman, W R AD - National Park Service, Boston Support Office, 15 State Street, Boston, Massachusetts, USA 02109, Deb_DiQuinzio@nps.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 179 EP - 185 VL - 22 IS - 1 SN - 0277-5212, 0277-5212 KW - Salt marsh sharp-tailed sparrow KW - Salt-marsh Sharp-tailed sparrow KW - USA, Rhode Island, Galilee KW - tidal flow restriction KW - ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts; Water Resources Abstracts KW - Brackish KW - D 04671:Birds KW - Q1 01423:Behaviour KW - SW 0810:General KW - Q5 01521:Mechanical and natural changes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18397576?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Wetlands&rft.atitle=Nesting+Ecology+of+Saltmarsh+Sharp-tailed+Sparrows+in+a+tidally+restricted+salt+marsh&rft.au=DiQuinzio%2C+DA%3BPaton%2C+PWC%3BEddleman%2C+W+R&rft.aulast=DiQuinzio&rft.aufirst=DA&rft.date=2002-03-01&rft.volume=22&rft.issue=1&rft.spage=179&rft.isbn=&rft.btitle=&rft.title=Wetlands&rft.issn=02775212&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Brackish ER - TY - JOUR T1 - Maturation and fecundity of a stock-enhanced population of striped bass in the Savannah River Estuary, U.S.A. AN - 18392295; 5371568 AB - The striped bass Morone saxatilis population in the Savannah River (south-eastern U.S.A.) collapsed in the 1980s, and recent efforts to restore the population have resulted in increased catch-per-unit-effort (CPUE) of striped bass in the Savannah River Estuary (SRE). The abundance of eggs and larvae, however, remain well below historic levels. The primary cause of the population decline was remedied, and environmental conditions seem suitable for striped bass spawning. Regression analysis of data derived from ultrasonic imaging of 31 striped bass resulted in a statistical model that predicted ovary volume well (r super(2)=0.95). The enumeration of oocytes from ovarian tissue samples and the prediction of ovary volume allowed fecundity to be estimated without sacrificing the fish. Oocyte maturation in Savannah River striped bass seemed to progress normally, with oocytes developing to final stages of maturity in larger fish (>750 mm L sub(T)). Additionally, fecundity estimates were comparable to a neighbouring striped bass population. The environmental cues needed to trigger development and release of striped bass oocytes into the SRE appeared to be present. If most of the striped bass females in the SRE are still young (<7 years), the ability to produce large numbers of eggs will be limited. As these young fish mature, egg production probably will increase and the density of striped bass eggs eventually will approach historic levels, provided suitable habitat and water quality are maintained.Copyright 2002 The Fisheries Society of the British Isles JF - Journal of Fish Biology AU - Will, T A AU - Reinert, T R AU - Jennings, CA AD - United States Geological Survey-Biological Resources Division, Georgia Cooperative Fish and Wildlife Research Unit, Daniel B. Warnell School of Forest Resources, University of Georgia, Athens, Georgia, 30602-2152, U.S.A., jennings@uga.edu Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 532 EP - 544 PB - Academic Press VL - 60 IS - 3 SN - 0022-1112, 0022-1112 KW - Rockfish KW - Striped bass KW - Water Resources Abstracts; Oceanic Abstracts; ASFA 1: Biological Sciences & Living Resources; Ecology Abstracts KW - Brackish KW - Q1 01344:Reproduction and development KW - D 04668:Fish KW - O 1050:Vertebrates, Urochordates and Cephalochordates UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18392295?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Fish+Biology&rft.atitle=Maturation+and+fecundity+of+a+stock-enhanced+population+of+striped+bass+in+the+Savannah+River+Estuary%2C+U.S.A.&rft.au=Will%2C+T+A%3BReinert%2C+T+R%3BJennings%2C+CA&rft.aulast=Will&rft.aufirst=T&rft.date=2002-03-01&rft.volume=60&rft.issue=3&rft.spage=532&rft.isbn=&rft.btitle=&rft.title=Journal+of+Fish+Biology&rft.issn=00221112&rft_id=info:doi/10.1006%2Fjfbi.2002.1870 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Brackish DO - http://dx.doi.org/10.1006/jfbi.2002.1870 ER - TY - JOUR T1 - The endemic headwater stream amphibians of the American Northwest: associations with environmental gradients in a large forested preserve AN - 18386783; 5380900 AB - We used a large forested preserve (Olympic National Park, USA) to examine the habitat associations of a unique and environmentally sensitive stream amphibian fauna: Ascaphus truei Stegneger, Rhyacotriton olympicus (Gaige) and Dicamptodon copei Nussbaum. We quantified the relative abundance of stream amphibians and compared them to physical, topographic, climatic and landscape variables. All three species were associated with the south-west to north-east climate gradient, tending to be most abundant in the south-west. Although a habitat generalist relative to the other two species, Dicamptodon copei was absent from the north-eastern portion of the park. Ascaphus truei and Rhyacotriton olympicus were both associated with coarse substrates and steep gradients. Unlike studies in harvested forests, all stream amphibians were common in waters with unconsolidated surface geology (e.g. marine sediments that erode easily). Studies of ecological preserves can provide an important baseline for evaluating species associations with environmental gradients and can reveal patterns not evident in more disturbed landscapes. JF - Global Ecology and Biogeography AU - Adams, MJ AU - Bury, R B AD - USGS Forest and Rangeland Ecosystem Science Center, 3200 SW Jefferson Way, Corvallis, OR 97331, U.S.A., Michael_Adams super(s)gs.gov, buryb super(s)gs.gov, Michael_Adams@usgs.gov,buryb@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 169 EP - 178 PB - Blackwell Science Ltd VL - 11 IS - 2 SN - 1466-822X, 1466-822X KW - Cope's giant salamander KW - Olympic salamander KW - Tailed frog KW - ASFA 1: Biological Sciences & Living Resources; ASFA 3: Aquatic Pollution & Environmental Quality; Ecology Abstracts KW - Freshwater KW - Q5 01523:Conservation, wildlife management and recreation KW - Q1 01423:Behaviour KW - Q1 01422:Environmental effects KW - Q1 01321:General KW - D 04669:Amphibians UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18386783?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Global+Ecology+and+Biogeography&rft.atitle=The+endemic+headwater+stream+amphibians+of+the+American+Northwest%3A+associations+with+environmental+gradients+in+a+large+forested+preserve&rft.au=Adams%2C+MJ%3BBury%2C+R+B&rft.aulast=Adams&rft.aufirst=MJ&rft.date=2002-03-01&rft.volume=11&rft.issue=2&rft.spage=169&rft.isbn=&rft.btitle=&rft.title=Global+Ecology+and+Biogeography&rft.issn=1466822X&rft_id=info:doi/10.1046%2Fj.1466-822X.2002.00272.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater DO - http://dx.doi.org/10.1046/j.1466-822X.2002.00272.x ER - TY - JOUR T1 - Feeding Habitat Selection by Great Blue Herons and Great Egrets Nesting in East Central Minnesota AN - 18385622; 5368022 AB - Great Blue Herons (Ardea herodias) and Great Egrets (Casmerodius albus) partitioned feeding habitat based on wetland size at Peltier Lake rookery in east central Minnesota. Great Blue Herons preferred large water-bodies ( greater than or equal to 350 ha), whereas Great Egrets fed most often at small ponds (<25 ha). Forty-nine percent of Great Blue Herons used wetlands 301 - 400 hectares in size and 83% of Great Egrets fed in wetlands <100 ha in size. Great Blue Herons selected large wetlands more often than expected both at the regional (30-km radius) and local (4-km radius) scales. Habitat use by Great Egrets was in proportion to availability at the regional scale, but they selected smaller wetlands for feeding more often than expected at a local scale. The median flight distance of Great Blue Herons was 2.7 km, similar to distances reported elsewhere. Great Egrets flew farther to feeding sites than Great Blue Herons, and flew farther (median = 13.5 km) than reported in other geographic areas. JF - Waterbirds AU - Custer, C M AU - Galli, J AD - USGS, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, La Crosse, WI 54603, USA, Christine_custer@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 115 EP - 124 VL - 25 IS - 1 SN - 1524-4695, 1524-4695 KW - Ardea alba KW - Great Egret KW - Great White Egret KW - Great blue heron KW - Animal Behavior Abstracts; Ecology Abstracts; ASFA 1: Biological Sciences & Living Resources KW - Freshwater KW - D 04671:Birds KW - Q1 01423:Behaviour KW - Y 25496:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18385622?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Waterbirds&rft.atitle=Feeding+Habitat+Selection+by+Great+Blue+Herons+and+Great+Egrets+Nesting+in+East+Central+Minnesota&rft.au=Custer%2C+C+M%3BGalli%2C+J&rft.aulast=Custer&rft.aufirst=C&rft.date=2002-03-01&rft.volume=25&rft.issue=1&rft.spage=115&rft.isbn=&rft.btitle=&rft.title=Waterbirds&rft.issn=15244695&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 N1 - SubjectsTermNotLitGenreText - Freshwater ER - TY - JOUR T1 - Regional Fidelity and Movement Patterns of Wintering Killdeer in an Agricultural Landscape AN - 18384400; 5368009 AB - Killdeer (Charadrius vociferus) is a common and widespread North American species for which there are few studies of residency patterns and movements. We quantified fidelity and movement patterns of 24 radio-tagged Killdeer in the Willamette Valley of Oregon during the winter of 1999-2000. Results from telemetry surveys and census efforts revealed that the group monitored was composed of winter residents (63%), winter transients (26%), and year-round residents (11%). Movements were localized with birds detected at an average distance of 5.15 plus or minus 0.91 (SE) km from the site of capture. Mean home range size (95% kernel) was 7.73 plus or minus 3.19 km super(2). However, results also indicated periodic exploratory movements, with some birds detected up to 30 km from marking sites. Overall, individuals exhibited a low degree of fidelity to specific sites and were detected at an average of 11.9 plus or minus 1.1 sites. No differences were found in monthly movement patterns. In almost all cases, year-round residents were more sedentary than winter residents and winter transients. Results indicate a complex regional population structure and highlight the need to consider both migrant and resident birds, as well as seasonal differences in habitat needs and space use requirements, in future conservation planning efforts. JF - Waterbirds AU - Sanzenbacher, P M AU - Haig, S M AD - USGS Forest and Rangeland Ecosystem Science Center, 3200 SW Jefferson Way, Corvallis, OR 97331, USA Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 16 EP - 25 VL - 25 IS - 1 SN - 1524-4695, 1524-4695 KW - Killdeer KW - ecological distribution KW - ASFA 1: Biological Sciences & Living Resources; Animal Behavior Abstracts; Ecology Abstracts KW - D 04671:Birds KW - Q1 01423:Behaviour KW - Y 25656:Birds UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18384400?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aecology&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Waterbirds&rft.atitle=Regional+Fidelity+and+Movement+Patterns+of+Wintering+Killdeer+in+an+Agricultural+Landscape&rft.au=Sanzenbacher%2C+P+M%3BHaig%2C+S+M&rft.aulast=Sanzenbacher&rft.aufirst=P&rft.date=2002-03-01&rft.volume=25&rft.issue=1&rft.spage=16&rft.isbn=&rft.btitle=&rft.title=Waterbirds&rft.issn=15244695&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - A rapid and efficient assay for extracting DNA from fungi AN - 18273294; 5330365 AB - Aims: A method for the rapid extraction of fungal DNA from small quantities of tissue in a batch-processing format was investigated. Methods and Results: Tissue (< 3.0 mg) was scraped from freshly-grown fungal isolates. The tissue was suspended in buffer AP1 and subjected to seven rounds of freeze/thaw using a crushed dry ice/ethanol bath and a boiling water bath. After a 30 min boiling step, the tissue was quickly ground against the wall of the microfuge tube using a sterile pipette tip. The Qiagen DNeasy Plant Tissue Kit protocol was then used to purify the DNA for PCR /sequencing applications. Conclusions: The method allowed batch DNA extraction from multiple fungal isolates using a simple yet rapid and reliable assay. Significance and Impact of the Study: Use of this assay will allow researchers to obtain DNA from fungi quickly for use in molecular assays that previously required specialized instrumentation, was time-consuming or was not conducive to batch processing. JF - Letters in Applied Microbiology AU - Griffin, D AU - Kellogg, C AU - Peak, K AU - Shinn, E AD - United States Geological Survey, Center for Coastal and Regional Marine Studies, St Petersburg, FL, USA, dgriffin@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 210 EP - 214 PB - Blackwell Science Ltd VL - 34 IS - 3 SN - 0266-8254, 0266-8254 KW - Microbiology Abstracts C: Algology, Mycology & Protozoology; Microbiology Abstracts A: Industrial & Applied Microbiology KW - Extraction KW - Assays KW - Freeze-thawing KW - K 03069:Fungi KW - A 01117:Fungi UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18273294?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Amicrobiologya&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Letters+in+Applied+Microbiology&rft.atitle=A+rapid+and+efficient+assay+for+extracting+DNA+from+fungi&rft.au=Griffin%2C+D%3BKellogg%2C+C%3BPeak%2C+K%3BShinn%2C+E&rft.aulast=Griffin&rft.aufirst=D&rft.date=2002-03-01&rft.volume=34&rft.issue=3&rft.spage=210&rft.isbn=&rft.btitle=&rft.title=Letters+in+Applied+Microbiology&rft.issn=02668254&rft_id=info:doi/10.1046%2Fj.1472-765x.2002.01071.x LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-14 N1 - SubjectsTermNotLitGenreText - Extraction; Freeze-thawing; Assays DO - http://dx.doi.org/10.1046/j.1472-765x.2002.01071.x ER - TY - JOUR T1 - Effects of vegetation management in constructed wetland treatment cells on water quality and mosquito production AN - 16151071; 5409947 AB - The impact of three vegetation management strategies on wetland treatment function and mosquito production was assessed in eight free water surface wetland test cells in southern California during 1998-1999. The effectiveness of the strategies to limit bulrush Schoenoplectus californicus culm density within the cells was also investigated. Removing accumulated emergent biomass and physically limiting the area in which vegetation could reestablish, significantly improved the ammonia-nitrogen removal efficiency of the wetland cells, which received an ammonia-dominated municipal wastewater effluent (average loading rate = 9.88 kg/ha per day NH sub(4)-N). We determined that interspersing open water with emergent vegetation is critical for maintaining the wetland's treatment capability, particularly for systems high in NH sub(4)-N. Burning aboveground plant parts and thinning rhizomes only temporarily curtailed vegetation proliferation in shallow zones, whereas creating hummocks surrounded by deeper water successfully restricted the emergent vegetation to the shallower hummock areas. Since the hummock configuration kept open water areas interspersed throughout the stands of emergent vegetation, the strategy was also effective in reducing mosquito production. Decreasing vegetation biomass reduced mosquito refuge areas while increasing mosquito predator habitat. Therefore, the combined goals of water quality improvement and mosquito management were achieved by managing the spatial pattern of emergent vegetation to mimic an early successional growth stage, i.e. actively growing plants interspersed with open water. JF - Ecological Engineering AU - Thullen, J S AU - Sartoris, J J AU - Walton, W E AD - Midcontinent Ecological Science Center, U.S. Geological Survey, c/o U.S. Bureau of Reclamation, PO Box 25007, D-8220, Denver, CO 80225-0007, USA, joan_thullen@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 441 EP - 457 VL - 18 IS - 4 SN - 0925-8574, 0925-8574 KW - Diptera KW - Mosquitoes KW - USA, California KW - Pollution Abstracts; Ecology Abstracts; Entomology Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Water Resources Abstracts KW - Schoenoplectus californicus KW - Aquatic Insects KW - Artificial wetlands KW - Artificial Wetlands KW - Restoration KW - Water treatment KW - Wetlands KW - Aquatic insects KW - Water Quality KW - Vegetation KW - Culicidae KW - Pest control KW - Water quality control KW - Plant control KW - Environment management KW - D 04700:Management KW - SW 3040:Wastewater treatment processes KW - P 2000:FRESHWATER POLLUTION KW - Z 05210:Aquatic entomology KW - Q5 08522:Protective measures and control UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16151071?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aasfaaquaticpollution&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Ecological+Engineering&rft.atitle=Effects+of+vegetation+management+in+constructed+wetland+treatment+cells+on+water+quality+and+mosquito+production&rft.au=Thullen%2C+J+S%3BSartoris%2C+J+J%3BWalton%2C+W+E&rft.aulast=Thullen&rft.aufirst=J&rft.date=2002-03-01&rft.volume=18&rft.issue=4&rft.spage=441&rft.isbn=&rft.btitle=&rft.title=Ecological+Engineering&rft.issn=09258574&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2003-06-01 N1 - Last updated - 2014-05-07 N1 - SubjectsTermNotLitGenreText - Water quality control; Plant control; Wetlands; Pest control; Restoration; Water treatment; Vegetation; Environment management; Artificial wetlands; Aquatic insects; Aquatic Insects; Water Quality; Mosquitoes; Artificial Wetlands; Schoenoplectus californicus; Culicidae ER - TY - JOUR T1 - Microbial Mineralization of Ethene Under Sulfate-Reducing Conditions AN - 16140611; 5376344 AB - Previous investigations demonstrated that respiratory reductive dechlorination of vinyl chloride (VC) can be efficient even at H sub(2) concentrations ( less than or equal to 2 nM) that are characteristic of SO sub(4)-reducing conditions. In the study reported here, microorganisms indigenous to a lake-bed sediment completely mineralized [1, 2- super(14)C] ethene to super(14)CO sub(2) when incubated under SO sub(4)-reducing conditions. Together, these observations argue for a novel mechanism for the net anaerobic oxidation of VC to CO sub(2): reductive dechlorination of VC to ethene followed by anaerobic oxidation of ethene to CO sub(2). Moreover, the results of this study suggest that reliance on ethene and/or ethane accumulation as a quantitative indicator of complete reductive dechlorination of chloroethene contaminants may not be warranted. JF - Bioremediation Journal AU - Bradley, P M AU - Chapelle, F H AD - U.S. Geological Survey, 720 Gracern Rd, Suite 129, Columbia, SC 29210-7651, USA, pbradley@usgs.gov Y1 - 2002/03// PY - 2002 DA - Mar 2002 SP - 1 EP - 8 VL - 6 IS - 1 SN - 1088-9868, 1088-9868 KW - ethene KW - Biotechnology and Bioengineering Abstracts; Bioengineering Abstracts; Microbiology Abstracts A: Industrial & Applied Microbiology; Pollution Abstracts KW - Sediment pollution KW - Bioremediation KW - Mineralization KW - Anaerobic conditions KW - Oxidation KW - A 01063:Utilization KW - P 2000:FRESHWATER POLLUTION KW - W 30965:Miscellaneous, Reviews KW - W4 210:Bioremediation, Bioreactors & BioCycling UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/16140611?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Abiotechresearch&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Bioremediation+Journal&rft.atitle=Microbial+Mineralization+of+Ethene+Under+Sulfate-Reducing+Conditions&rft.au=Bradley%2C+P+M%3BChapelle%2C+F+H&rft.aulast=Bradley&rft.aufirst=P&rft.date=2002-03-01&rft.volume=6&rft.issue=1&rft.spage=1&rft.isbn=&rft.btitle=&rft.title=Bioremediation+Journal&rft.issn=10889868&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2002-06-01 N1 - Last updated - 2011-12-14 N1 - SubjectsTermNotLitGenreText - Sediment pollution; Bioremediation; Oxidation; Anaerobic conditions; Mineralization ER - TY - JOUR T1 - Bedform movement recorded by sequential single-beam surveys in tidal rivers AN - 18561661; 5346271 AB - A portable system for bedform-mapping was evaluated in the delta of the lower Sacramento and San Joaquin Rivers, California, from 1998 to 2000. Bedform profiles were surveyed with a two-person crew using an array of four single-beam transducers on boats about 6 m in length. Methods for processing the bedform profiles into maps with geographic coordinates were developed for spreadsheet programs and surface-contouring software. Straight reaches were surveyed every few days or weeks to determine locations of sand deposition, net transport directions, flow thresholds for bedform regimes, and bedform-transport rates. In one channel of unidirectional flow, the portable system was used to record changes in bedform regime through minor fluctuations of low discharge, and through high discharges near channel capacity. In another channel with reversing flows from tides, the portable system recorded directions of net bedload-transport that would be undetectable by standard bedload sampling alone. JF - Journal of Hydrology (Amsterdam) AU - Dinehart, R L AD - US Geological Survey, 6000 J Street, Placer Hall, Sacramento, CA 95819, USA, rldine@usgs.gov Y1 - 2002/02/28/ PY - 2002 DA - 2002 Feb 28 SP - 25 EP - 39 VL - 258 IS - 1-4 SN - 0022-1694, 0022-1694 KW - USA, California, Sacramento R. KW - USA, California, San Joaquin R. KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts; Aqualine Abstracts KW - M2 556.53:Rivers, Streams, Canals (556.53) KW - SW 0870:Erosion and sedimentation KW - M2 551.466.78:Tides near the coast. Shallow water sides. Boxes (mascarets) (551.466.78) KW - Q2 02264:Sediments and sedimentation KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18561661?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+Hydrology+%28Amsterdam%29&rft.atitle=Bedform+movement+recorded+by+sequential+single-beam+surveys+in+tidal+rivers&rft.au=Dinehart%2C+R+L&rft.aulast=Dinehart&rft.aufirst=R&rft.date=2002-02-28&rft.volume=258&rft.issue=1-4&rft.spage=25&rft.isbn=&rft.btitle=&rft.title=Journal+of+Hydrology+%28Amsterdam%29&rft.issn=00221694&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Controls on old and new water contributions to stream flow at some nested catchments in Vermont, USA AN - 18554346; 5346263 AB - Factors controlling the partitioning of old and new water contributions to stream flow were investigated for three events in four catchments (three of which were nested) at Sleepers River Research Watershed in Danville, Vermont. In the 1993 snowmelt period, two-component isotopic hydrograph separations showed that new water (meltwater) inputs to the stream ranged widely from 41 to 74%, and increased with catchment size (41 to 11 125 ha) (with one exception) and with open land cover (0-73%). Peak dissolved organic carbon concentrations and relative alkalinity dilution in stream water ranked in the same order among catchments as the new water fractions, suggesting that new water followed shallow flow paths. During the 1994 snowmelt, despite similar timing and magnitude of melt inputs, the new-water contribution to stream flow ranged only from 30 to 36% in the four catchments. We conclude that the uncommonly high and variable new water fractions in streamwater during the 1993 melt were caused by direct runoff of meltwater over frozen ground, which was prevalent in open land areas during the 1993 winter. In a high-intensity summer rainstorm in 1993, new water fractions were smaller relative to the 1993 snowmelt, ranging from 28 to 46%, but they ranked in the identical catchment order. Reconciliation of the contrasting patterns of new-old water partitioning in the three events appears to require an explanation that invokes multiple processes and effects, including: 1. topographically controlled increase in surface-saturated area with increasing catchment size; 2. direct runoff over frozen ground; 3. low infiltration in agriculturally compacted soils; 4. differences in soil transmissivity, which may be more relevant under dry antecedent conditions. These data highlight some of the difficulties faced by catchment hydrologists in formulating a theory of runoff generation at varying basin scales. JF - Hydrological Processes AU - Shanley, J B AU - Kendall, C AU - Smith, TE AU - Wolock, D M AU - McDonnell, J J AD - U.S. Geological Survey, P.O. Box 628, Montpelier, VT 05601, USA, jshanley@usgs.gov Y1 - 2002/02/28/ PY - 2002 DA - 2002 Feb 28 SP - 589 EP - 609 VL - 16 IS - 3 SN - 0885-6087, 0885-6087 KW - USA, Vermont KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - M2 556.51:Drainage Areas (556.51) KW - SW 0835:Streamflow and runoff KW - Q2 02171:Dynamics of lakes and rivers UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18554346?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrological+Processes&rft.atitle=Controls+on+old+and+new+water+contributions+to+stream+flow+at+some+nested+catchments+in+Vermont%2C+USA&rft.au=Shanley%2C+J+B%3BKendall%2C+C%3BSmith%2C+TE%3BWolock%2C+D+M%3BMcDonnell%2C+J+J&rft.aulast=Shanley&rft.aufirst=J&rft.date=2002-02-28&rft.volume=16&rft.issue=3&rft.spage=589&rft.isbn=&rft.btitle=&rft.title=Hydrological+Processes&rft.issn=08856087&rft_id=info:doi/10.1002%2Fhyp.312 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1002/hyp.312 ER - TY - JOUR T1 - Analysis and detection of the herbicides dimethenamid and flufenacet and their sulfonic and oxanilic acid degradates in natural water. AN - 71470383; 11853478 AB - Dimethenamid [2-chloro-N-(2,4-dimethyl-3-thienyl)-N-(2-methoxy-1-methylethyl)acetamide] and flufenacet [N-(4-fluorophenyl)-N-(1-methylethyl)-2-(5-(trifluoromethyl)-1,3,4-thiadiazol-2-yl)oxy] were isolated by C-18 solid-phase extraction and separated from their ethanesulfonic acid (ESA) and oxanilic acid (OXA) degradates during their elution using ethyl acetate for the parent compound, followed by methanol for the polar degradates. The parent compounds were detected using gas chromatography-mass spectrometry in selected-ion mode. The ESA and OXA degradates were detected using high-performance liquid chromatography--electrospray mass spectrometry (HPLC-ESPMS) in negative-ion mode. The method detection limits for a 123-mL sample ranged from 0.01 to 0.07 microg/L. These methods are compatible with existing methods and thus allow for analysis of 17 commonly used herbicides and 18 of their degradation compounds with one extraction. In a study of herbicide transport near the mouth of the Mississippi River during 1999 and 2000, dimethenamid and its ESA and OXA degradates were detected in surface water samples during the annual spring flushes. For flufenacet, the only detections at the study site were for the ESA degradates in samples collected at the peak of the herbicide spring flush in 2000. The low frequency of detections in surface water likely is due to dimethenamid and flufenacet being relatively new herbicides. In addition, detectable amounts of the stable degradates have not been detected in ground water. JF - Journal of agricultural and food chemistry AU - Zimmerman, Lisa R AU - Schneider, Rudolf J AU - Thurman, E M AD - U.S. Geological Survey, 4821 Quail Crest Place, Lawrence, KS 66049, USA. zimmerman.lisa@usgs.gov Y1 - 2002/02/27/ PY - 2002 DA - 2002 Feb 27 SP - 1045 EP - 1052 VL - 50 IS - 5 SN - 0021-8561, 0021-8561 KW - Acetamides KW - 0 KW - Acetanilides KW - Herbicides KW - Indicators and Reagents KW - Sulfones KW - Thiadiazoles KW - dimethenamid KW - Water KW - 059QF0KO0R KW - oxanilic acid KW - 136B46378D KW - FOE 5043 KW - 142459-58-3 KW - Oxamic Acid KW - QU60N5OPLG KW - Index Medicus KW - Molecular Structure KW - Gas Chromatography-Mass Spectrometry -- methods KW - Models, Molecular KW - Chromatography, High Pressure Liquid -- methods KW - Sulfones -- analysis KW - Water -- analysis KW - Thiadiazoles -- analysis KW - Fresh Water -- analysis KW - Acetamides -- analysis KW - Herbicides -- analysis KW - Acetanilides -- analysis KW - Oxamic Acid -- analysis KW - Oxamic Acid -- analogs & derivatives UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71470383?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+agricultural+and+food+chemistry&rft.atitle=Analysis+and+detection+of+the+herbicides+dimethenamid+and+flufenacet+and+their+sulfonic+and+oxanilic+acid+degradates+in+natural+water.&rft.au=Zimmerman%2C+Lisa+R%3BSchneider%2C+Rudolf+J%3BThurman%2C+E+M&rft.aulast=Zimmerman&rft.aufirst=Lisa&rft.date=2002-02-27&rft.volume=50&rft.issue=5&rft.spage=1045&rft.isbn=&rft.btitle=&rft.title=Journal+of+agricultural+and+food+chemistry&rft.issn=00218561&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-05-02 N1 - Date created - 2002-02-20 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - A modular approach to addressing model design, scale, and parameter estimation issues in distributed hydrological modelling AN - 18561718; 5346288 AB - A modular approach to model design and construction provides a flexible framework in which to focus the multidisciplinary research and operational efforts needed to facilitate the development, selection, and application of the most robust distributed modelling methods. A variety of modular approaches have been developed, but with little consideration for compatibility among systems and concepts. Several systems are proprietary, limiting any user interaction. The US Geological Survey modular modelling system (MMS) is a modular modelling framework that uses an open source software approach to enable all members of the scientific community to address collaboratively the many complex issues associated with the design, development, and application of distributed hydrological and environmental models. Implementation of a common modular concept is not a trivial task. However, it brings the resources of a larger community to bear on the problems of distributed modelling, provides a framework in which to compare alternative modelling approaches objectively, and provides a means of sharing the latest modelling advances. The concepts and components of the MMS are described and an example application of the MMS, in a decision-support system context, is presented to demonstrate current system capabilities. JF - Hydrological Processes AU - Leavesley, G H AU - Markstrom, S L AU - Restrepo, P J AU - Viger, R J AD - USGS, WRD, BOX 25046, MS412, DFC, Denver, CO 808225, USA, george@usgs.gov Y1 - 2002/02/15/ PY - 2002 DA - 2002 Feb 15 SP - 173 EP - 187 VL - 16 IS - 2 SN - 0885-6087, 0885-6087 KW - ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts; Water Resources Abstracts KW - Q2 02121:General KW - SW 5040:Data acquisition KW - M2 556:General (556) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18561718?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Awaterresources&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrological+Processes&rft.atitle=A+modular+approach+to+addressing+model+design%2C+scale%2C+and+parameter+estimation+issues+in+distributed+hydrological+modelling&rft.au=Leavesley%2C+G+H%3BMarkstrom%2C+S+L%3BRestrepo%2C+P+J%3BViger%2C+R+J&rft.aulast=Leavesley&rft.aufirst=G&rft.date=2002-02-15&rft.volume=16&rft.issue=2&rft.spage=173&rft.isbn=&rft.btitle=&rft.title=Hydrological+Processes&rft.issn=08856087&rft_id=info:doi/10.1002%2Fhyp.344 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - SuppNotes - Special Issue: The Future of Distributed Hydrological Modelling. N1 - Last updated - 2011-12-13 DO - http://dx.doi.org/10.1002/hyp.344 ER - TY - JOUR T1 - Corn Leaf Nitrate Reductase - A Nontoxic Alternative to Cadmium for Photometric Nitrate Determinations in Water Samples by Air-Segmented Continuous-Flow Analysis AN - 18370537; 5355894 AB - Development, characterization, and operational details of an enzymatic, air-segmented continuous-flow analytical method for colorimetric determination of nitrate + nitrite in natural-water samples is described. This method is similar to U.S. Environmental Protection Agency method 353.2 and U.S. Geological Survey method I-2545-90 except that nitrate is reduced to nitrite by soluble nitrate reductase (NaR, EC 1.6.6.1) purified from corn leaves rather than a packed-bed cadmium reactor. A three-channel, air-segmented continuous-flow analyzer - configured for simultaneous determination of nitrite (0.020-1.000 mg-N/L) and nitrate + nitrite (0.05-5.00 mg-N/L) by the nitrate reductase and cadmium reduction methods - was used to characterize analytical performance of the enzymatic reduction method. At a sampling rate of 90 h super(-1), sample interaction was less than 1% for all three methods. Method detection limits were 0.001 mg of NO sub(2) super(-)-N/L for nitrite, 0.003 mg of NO sub(3) super(-) + NO sub(2) super(-) -N/L for nitrate + nitrite by the cadmium-reduction method, and 0.006 mg of NO sub(3) super(-) + NO sub(2) super(-) -N/L for nitrate + nitrite by the enzymatic-reduction method. Reduction of nitrate to nitrite by both methods was greater than 95% complete over the entire calibration range. The difference between the means of nitrate + nitrite concentrations in 124 natural-water samples determined simultaneously by the two methods was not significantly different from zero at the p = 0.05 level. JF - Environmental Science & Technology AU - Patton, C J AU - Fischer, A E AU - Campbell, W H AU - Campbell, E R AD - U.S. Geological Survey, National Water Quality Laboratory, P.O. Box 25046, MS 407, Denver Federal Center, Denver, CO 80225-0046, USA, cjpatton@usgs.gov Y1 - 2002/02/15/ PY - 2002 DA - 2002 Feb 15 SP - 729 EP - 735 VL - 36 IS - 4 SN - 0013-936X, 0013-936X KW - Pollution Abstracts; Aqualine Abstracts; Water Resources Abstracts KW - SW 5010:Network design KW - P 2000:FRESHWATER POLLUTION KW - AQ 00003:Monitoring and Analysis of Water and Wastes UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/18370537?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Environmental+Science+%26+Technology&rft.atitle=Corn+Leaf+Nitrate+Reductase+-+A+Nontoxic+Alternative+to+Cadmium+for+Photometric+Nitrate+Determinations+in+Water+Samples+by+Air-Segmented+Continuous-Flow+Analysis&rft.au=Patton%2C+C+J%3BFischer%2C+A+E%3BCampbell%2C+W+H%3BCampbell%2C+E+R&rft.aulast=Patton&rft.aufirst=C&rft.date=2002-02-15&rft.volume=36&rft.issue=4&rft.spage=729&rft.isbn=&rft.btitle=&rft.title=Environmental+Science+%26+Technology&rft.issn=0013936X&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2006-11-01 N1 - Last updated - 2011-12-13 ER - TY - JOUR T1 - Recharge and groundwater models: an overview AN - 860394952; 14382481 AB - Recharge is a fundamental component of groundwater systems, and in groundwater-modeling exercises recharge is either measured and specified or estimated during model calibration. The most appropriate way to represent recharge in a groundwater model depends upon both physical factors and study objectives. Where the water table is close to the land surface, as in humid climates or regions with low topographic relief, a constant-head boundary condition is used. Conversely, where the water table is relatively deep, as in drier climates or regions with high relief, a specified-flux boundary condition is used. In most modeling applications, mixed-type conditions are more effective, or a combination of the different types can be used. The relative distribution of recharge can be estimated from water-level data only, but flux observations must be incorporated in order to estimate rates of recharge. Flux measurements are based on either Darcian velocities (e.g., stream baseflow) or seepage velocities (e.g., groundwater age). In order to estimate the effective porosity independently, both types of flux measurements must be available. Recharge is often estimated more efficiently when automated inverse techniques are used. Other important applications are the delineation of areas contributing recharge to wells and the estimation of paleorecharge rates using carbon-14.Original Abstract: La recharge est une composante fondamentale des systemes aquiferes, et dans les exercices de modelisation de nappes la recharge est mesuree et determinee ou estimee lors de la calibration du modele. La facon la plus appropriee de representer la recharge dans un modele de nappe depend a la fois de facteurs physiques et des objectifs de l'etude. Lorsque la nappe est proche de la surface, comme c'est le cas sous climats humides ou dans les regions a topographie basse, une condition de limite a charge constante est utilisee. Inversement, lorsque la nappe est relativement profonde, comme c'est le cas sous climats plus secs ou dans les regions a fort relief, une condition de limite a flux specifique est utilisee. Dans la plupart des applications de modelisation, des conditions de type mixte sont plus efficaces, ou bien une combinaison de differents types peut etre utilisee. La distribution relative de la recharge peut etre estimee uniquement a partir des donnees de niveau piezometrique, mais des observations sur les flux doivent etre introduites pour l'estimation des valeurs de la recharge. Les mesures de flux sont basees soit sur des vitesses de Darcy, par exemple le debit de base d'un cours d'eau, soit sur des vitesses d'ecoulement souterrain, par exemple des ages d'eau souterraine. Dans le but d'estimer de maniere independante la porosite efficace, les deux types de mesures doivent etre pris en compte. La recharge est souvent estimee de facon plus efficace lorsque l'on recourt a des techniques d'inversion automatisee. D'autres applications importantes sont la delimitation des zones de recharge de puits et l'estimation des valeurs de paleorecharge par le carbone-14. JF - Hydrogeology Journal AU - Sanford, Ward AD - US Geological Survey, 431 National Center, Reston, Virginia 20192, USA, wsanford@usgs.gov Y1 - 2002/02// PY - 2002 DA - Feb 2002 SP - 110 EP - 120 PB - Springer-Verlag, P.O. Box 2485 Secaucus NJ 07096-2485 USA VL - 10 IS - 1 SN - 1431-2174, 1431-2174 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Automated recording KW - Palaeo studies KW - Hydrogeology KW - Water table KW - Topographic effects KW - Streams KW - Boundary conditions KW - Paleoclimates KW - Groundwater recharge KW - Calibrations KW - Seepages KW - Boundary Conditions KW - Base flow KW - Porosity KW - Velocity KW - Palaeoclimate KW - Water Table KW - Model Studies KW - Literature reviews KW - Groundwater models KW - Stream KW - Groundwater age KW - Groundwater KW - Groundwater Recharge KW - Fluctuations KW - Q2 09148:Palaeo-studies KW - AQ 00007:Industrial Effluents KW - SW 0840:Groundwater KW - M2 556.16:Runoff (556.16) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/860394952?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Recharge+and+groundwater+models%3A+an+overview&rft.au=Sanford%2C+Ward&rft.aulast=Sanford&rft.aufirst=Ward&rft.date=2002-02-01&rft.volume=10&rft.issue=1&rft.spage=110&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-001-0173-5 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-04-01 N1 - Last updated - 2015-04-09 N1 - SubjectsTermNotLitGenreText - Automated recording; Literature reviews; Palaeo studies; Stream; Porosity; Water table; Topographic effects; Palaeoclimate; Seepages; Groundwater recharge; Base flow; Groundwater models; Hydrogeology; Groundwater age; Boundary conditions; Paleoclimates; Calibrations; Boundary Conditions; Velocity; Water Table; Groundwater; Streams; Fluctuations; Groundwater Recharge; Model Studies DO - http://dx.doi.org/10.1007/s10040-001-0173-5 ER - TY - JOUR T1 - Using groundwater levels to estimate recharge AN - 860392174; 14382485 AB - Accurate estimation of groundwater recharge is extremely important for proper management of groundwater systems. Many different approaches exist for estimating recharge. This paper presents a review of methods that are based on groundwater-level data. The water-table fluctuation method may be the most widely used technique for estimating recharge; it requires knowledge of specific yield and changes in water levels over time. Advantages of this approach include its simplicity and an insensitivity to the mechanism by which water moves through the unsaturated zone. Uncertainty in estimates generated by this method relate to the limited accuracy with which specific yield can be determined and to the extent to which assumptions inherent in the method are valid. Other methods that use water levels (mostly based on the Darcy equation) are also described. The theory underlying the methods is explained. Examples from the literature are used to illustrate applications of the different methods.Original Abstract: Une estimation precise de la recharge des nappes est extremement importante pour une gestion appropriee des systemes aquiferes. Il existe de nombreuses approches differentes pour estimer la recharge. Cet article passe une revue les methodes basees sur les donnees piezometriques de nappes. La methode d'analyse des fluctuations de nappe est probablement la methode la plus largement utilisee pour estimer la recharge; elle necessite la connaissance du rendement specifique et des variations du niveau de la nappe au cours du temps. L'interet de cette approche tient en sa simplicite et dans son insensibilite au mecanisme qui fait s'ecouler l'eau dans la zone non saturee. L'incertitude sur les estimations introduite par cette methode est liee a la precision limitee avec laquelle le rendement specifique peut etre determine et a l'etendue de la validite des hypotheses inherentes a la methode. D'autres methodes qui recourent aux niveaux piezometriques, pour la plupart basees sur l'equation de Darcy, sont egalement decrites, et la theorie supportant chacune de ces methodes est expliquee. Des exemples tires de la litterature sont utilises pour illustrer des applications des differentes methodes. JF - Hydrogeology Journal AU - Healy, Richard W AU - Cook, Peter G AD - US Geological Survey, MS 413, Box 25046, Denver Federal Center, Lakewood, Colorado 80225, USA, rwhealy@usgs.gov Y1 - 2002/02// PY - 2002 DA - Feb 2002 SP - 91 EP - 109 PB - Springer-Verlag, P.O. Box 2485 Secaucus NJ 07096-2485 USA VL - 10 IS - 1 SN - 1431-2174, 1431-2174 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Aeration Zone KW - Hydrogeology KW - Groundwater levels KW - Water levels KW - Groundwater recharge KW - Ground water KW - Specific Yield KW - Mathematical models KW - Estimating KW - Water Level KW - Water Table KW - Water table fluctuations KW - Reviews KW - Groundwater KW - Groundwater Recharge KW - Fluctuations KW - AQ 00007:Industrial Effluents KW - SW 0840:Groundwater KW - Q2 09162:Methods and instruments KW - M2 556.13:Evaporation/Evapotranspiration (556.13) UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/860392174?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Using+groundwater+levels+to+estimate+recharge&rft.au=Healy%2C+Richard+W%3BCook%2C+Peter+G&rft.aulast=Healy&rft.aufirst=Richard&rft.date=2002-02-01&rft.volume=10&rft.issue=1&rft.spage=91&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-001-0178-0 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-04-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Water levels; Mathematical models; Ground water; Water table fluctuations; Groundwater recharge; Hydrogeology; Groundwater levels; Aeration Zone; Reviews; Estimating; Specific Yield; Water Level; Groundwater; Water Table; Fluctuations; Groundwater Recharge DO - http://dx.doi.org/10.1007/s10040-001-0178-0 ER - TY - JOUR T1 - Groundwater recharge and agricultural contamination AN - 856784408; 14263064 AB - Agriculture has had direct and indirect effects on the rates and compositions of groundwater recharge and aquifer biogeochemistry. Direct effects include dissolution and transport of excess quantities of fertilizers and associated materials and hydrologic alterations related to irrigation and drainage. Some indirect effects include changes in water-rock reactions in soils and aquifers caused by increased concentrations of dissolved oxidants, protons, and major ions. Agricultural activities have directly or indirectly affected the concentrations of a large number of inorganic chemicals in groundwater, for example NO sub(3) super(-), N sub(2), Cl, SO sub(4) super(2-), H super(+), P, C, K, Mg, Ca, Sr, Ba, Ra, and As, as well as a wide variety of pesticides and other organic compounds. For reactive contaminants like NO sub(3) super(-), a combination of chemical, isotopic, and environmental-tracer analytical approaches might be required to resolve changing inputs from subsequent alterations as causes of concentration gradients in groundwater. Groundwater records derived from multi-component hydrostratigraphic data can be used to quantify recharge rates and residence times of water and dissolved contaminants, document past variations in recharging contaminant loads, and identify natural contaminant-remediation processes. These data indicate that many of the world's surficial aquifers contain transient records of changing agricultural contamination from the last half of the 20th century. The transient agricultural groundwater signal has important implications for long-term trends and spatial heterogeneity in discharge.Original Abstract: L'agriculture a eu des effets directs et indirects sur la recharge et la composition des nappes et sur la biogeochimie des aquiferes. Les effets directs sont la dissolution et le transport de quantites excessives d'engrais et des produits associes et des modifications hydrologiques liees a l'irrigation et au drainage. Certains des effets indirects sont des modifications des reactions eau-roche dans les sols et dans les aquiferes, causees par des concentrations croissantes d'oxydants, de protons et d'ions majeurs dissous. Les activites agricoles ont affecte directement ou indirectement les concentrations d'un grand nombre de composes mineraux dans les eaux souterraines, comme par exemple NO sub(3) super(-), N sub(2), Cl, SO sub(4) super(2-), H super(+), P, C, K, Mg, Ca, Sr, Ba, Ra, As, de meme qu'une grande variete de pesticides, de produits de degradation et d'autres composes organiques. Pour les contaminants reactifs comme NO sub(3), une combinaison d'approches analytiques de traceurs chimiques, isotopiques et environnementaux peut etre necessaire pour analyser les changements des entrees dues a des modifications causant des gradients de concentration dans les eaux souterraines. Les chroniques de nappes fournies par des donnees hydrostratigraphiques a composantes multiples peuvent etre utilisees pour quantifier les valeurs de recharge et les temps de sejour de l'eau et des contaminants dissous, pour etablir les variations passees d'apports de charges contaminantes et pour identifier les processus naturels de remediation des contaminations. Ces donnees indiquent que de nombreux aquiferes a la surface du globe contiennent et sont en train de transporter des temoignages transitoires provenant des variations de la contamination agricole au cours de la derniere moitie du 20eme siecle. Le signal transitoire d'origine agricole dans les nappes presente des implications importantes en ce qui concerne les tendances a long terme et l'heterogeneite spatiale de l'ecoulement. JF - Hydrogeology Journal AU - Boehlke, John-Karl AD - US Geological Survey, 431 National Center, VA 20192, Reston, USA, jkbohlke@usgs.gov Y1 - 2002/02// PY - 2002 DA - Feb 2002 SP - 153 EP - 179 PB - Springer-Verlag, P.O. Box 2485 Secaucus NJ 07096-2485 USA VL - 10 IS - 1 SN - 1431-2174, 1431-2174 KW - Water Resources Abstracts; Aqualine Abstracts; ASFA 2: Ocean Technology Policy & Non-Living Resources; Meteorological & Geoastrophysical Abstracts KW - Aquifers KW - Agriculture KW - Aquifer KW - Contamination KW - Residence time KW - Hydrogeology KW - Groundwater Pollution KW - Groundwater recharge KW - Fertilizers KW - Pollutants KW - Irrigation and drainage KW - Soils KW - Heterogeneity KW - Biogeochemistry KW - Biogeochemical cycle KW - Drainage KW - Groundwater flow KW - Irrigation KW - Geohydrology KW - Groundwater pollution KW - Organic compounds KW - Groundwater KW - Groundwater Recharge KW - Organic compounds in groundwater KW - Spatial Heterogeneity KW - AQ 00001:Water Resources and Supplies KW - SW 1030:Use of water of impaired quality KW - M2 556.38:Groundwater Basins (556.38) KW - Q2 09161:General UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/856784408?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Aaqualine&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Hydrogeology+Journal&rft.atitle=Groundwater+recharge+and+agricultural+contamination&rft.au=Boehlke%2C+John-Karl&rft.aulast=Boehlke&rft.aufirst=John-Karl&rft.date=2002-02-01&rft.volume=10&rft.issue=1&rft.spage=153&rft.isbn=&rft.btitle=&rft.title=Hydrogeology+Journal&rft.issn=14312174&rft_id=info:doi/10.1007%2Fs10040-001-0183-3 LA - English DB - ProQuest Environmental Science Collection N1 - Date revised - 2011-03-01 N1 - Last updated - 2015-03-19 N1 - SubjectsTermNotLitGenreText - Aquifer; Fertilizers; Contamination; Biogeochemical cycle; Residence time; Irrigation; Soils; Organic compounds; Spatial Heterogeneity; Agriculture; Aquifers; Groundwater recharge; Biogeochemistry; Irrigation and drainage; Hydrogeology; Groundwater flow; Groundwater pollution; Organic compounds in groundwater; Pollutants; Drainage; Geohydrology; Groundwater Pollution; Groundwater; Heterogeneity; Groundwater Recharge DO - http://dx.doi.org/10.1007/s10040-001-0183-3 ER - TY - JOUR T1 - Assessment of relative accuracy in the determination of organic matter concentrations in aquatic systems. AN - 71484636; 11871711 AB - Accurate determinations of total (TOC), dissolved (DOC) and particulate (POC) organic carbon concentrations are critical for understanding the geochemical, environmental, and ecological roles of aquatic organic matter. Of particular significance for the drinking water industry, TOC measurements are the basis for compliance with US EPA regulations. The results of an interlaboratory comparison designed to identify problems associated with the determination of organic matter concentrations in drinking water supplies are presented. The study involved 31 laboratories and a variety of commercially available analytical instruments. All participating laboratories performed well on samples of potassium hydrogen phthalate (KHP), a compound commonly used as a standard in carbon analysis. However, problems associated with the oxidation of difficult to oxidize compounds, such as dodecylbenzene sulfonic acid and caffeine, were noted. Humic substances posed fewer problems for analysts. Particulate organic matter (POM) in the form of polystyrene beads, freeze-dried bacteria and pulverized leaf material were the most difficult for all analysts, with a wide range of performances reported. The POM results indicate that the methods surveyed in this study are inappropriate for the accurate determination of POC and TOC concentration. Finally, several analysts had difficulty in efficiently separating inorganic carbon from KHP solutions, thereby biasing DOC results. JF - Journal of environmental monitoring : JEM AU - Aiken, George AU - Kaplan, Louis A AU - Weishaa, James AD - US Geological Survey, Boulder, CO 80303, USA. graiken@usgs.gov Y1 - 2002/02// PY - 2002 DA - February 2002 SP - 70 EP - 74 VL - 4 IS - 1 SN - 1464-0325, 1464-0325 KW - Humic Substances KW - 0 KW - Organic Chemicals KW - Oxygen KW - S88TT14065 KW - Index Medicus KW - Sensitivity and Specificity KW - Oxidation-Reduction KW - Solubility KW - Reproducibility of Results KW - Humic Substances -- analysis KW - Guideline Adherence KW - Particle Size KW - Oxygen -- analysis KW - Water Microbiology KW - Water Supply KW - Organic Chemicals -- analysis KW - Environmental Monitoring -- methods UR - http://libproxy.lib.unc.edu/login?url=http://search.proquest.com/docview/71484636?accountid=14244 L2 - http://vb3lk7eb4t.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&rfr_id=info:sid/ProQ%3Atoxline&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.jtitle=Journal+of+environmental+monitoring+%3A+JEM&rft.atitle=Assessment+of+relative+accuracy+in+the+determination+of+organic+matter+concentrations+in+aquatic+systems.&rft.au=Aiken%2C+George%3BKaplan%2C+Louis+A%3BWeishaa%2C+James&rft.aulast=Aiken&rft.aufirst=George&rft.date=2002-02-01&rft.volume=4&rft.issue=1&rft.spage=70&rft.isbn=&rft.btitle=&rft.title=Journal+of+environmental+monitoring+%3A+JEM&rft.issn=14640325&rft_id=info:doi/ LA - English DB - ProQuest Environmental Science Collection N1 - Date completed - 2002-08-20 N1 - Date created - 2002-03-01 N1 - Date revised - 2017-01-13 N1 - Last updated - 2017-01-18 ER - TY - JOUR T1 - Economic prefeasibility studies of mining in the Koyukuk mining district, Northern Alaska AN - 52041047; 2003-000151 AB - Mining and processing cost analyses were conducted on nine mineral development scenarios for the Koyukuk Mining District study. The district is located on the upper portion of the Koyukuk River basin. Resources and recoverable metal values (RMV) ne