Selenium in San Francisco Bay zooplankton: Potential effects of hydrodynamics and food web interactions

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Show simple item record Purkerson, David en_US Doblin, Martina en_US Bollens, Stephen en_US Luoma, Samuel en_US Cutter, Gregory en_US
dc.contributor.editor en_US 2010-05-28T09:43:44Z 2010-05-28T09:43:44Z 2003 en_US
dc.identifier 2006007050 en_US
dc.identifier.citation Purkerson David et al. 2003, 'Selenium in San Francisco Bay zooplankton: Potential effects of hydrodynamics and food web interactions', Estuarine Research Federation, vol. 26, no. 4A, pp. 956-969. en_US
dc.identifier.issn 0160-8347 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract The potential toxicity of elevated selenium (Se) concentrations in aquatic ecosystems has stimulated efforts to measure Se concentrations in benthos, nekton, and waterfowl in San Francisco Bay (SF Bay). In September 1998, we initiated a 14 mo field study to determine the concentration of Se in SF Bay zooplankton, which play a major role in the Bay food web, but which have not previously been studied with respect to Se. Monthly vertical plankton tows were collected at several stations throughout SF Bay, and zooplankton were separated into two operationally defined size classes for Se analyses: 73-2,000 mum, and greater than or equal to2,000 mum. Selenium values ranged 1.02-6.07 mug Se g(-1) dry weight. No spatial differences in zooplankton Se concentrations were found. However, there were inter- and intra-annual differences. Zooplankton Se concentrations were enriched in the North Bay in Fall 1999 when compared to other seasons and locations within and outside SF Bay. The abundance and biovolume of the zooplankton community varied spatially between stations, but not seasonally within each station. Smaller herbivorous-omnivorous zooplankton had higher Se concentrations than larger omnivorous-carnivorous zooplankton. Selenium concentrations in zooplankton were negatively correlated with the proportion of total copepod biovolume comprising the large carnivorous copepod Tortanus dextrilobatus, but positively correlated with the proportion of copepod biovolume comprising smaller copepods of the family Oithonidae, suggesting an important role of trophic level and size in regulating zooplankton Se concentrations. en_US
dc.language en_US
dc.publisher Estuarine Research Federation en_US
dc.relation.isbasedon en_US
dc.title Selenium in San Francisco Bay zooplankton: Potential effects of hydrodynamics and food web interactions en_US
dc.parent Estuaries en_US
dc.journal.volume 26 en_US
dc.journal.number 4A en_US
dc.publocation Lawrence, USA en_US
dc.identifier.startpage 956 en_US
dc.identifier.endpage 969 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 040501 en_US
dc.personcode 0000046174 en_US
dc.personcode 996445 en_US
dc.personcode 0000046175 en_US
dc.personcode 0000046176 en_US
dc.personcode 0000027818 en_US
dc.percentage 100 en_US Biological Oceanography en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom 1.563 en_US en_US
dc.location.activity en_US

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