Document Detail


Accumulation of selenium in aquatic systems downstream of a uranium mining operation in northern Saskatchewan, Canada.
MedLine Citation:
PMID:  18346828     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this study was to investigate the accumulation of selenium in lakes downstream of a uranium mine operation in northern Saskatchewan, Canada. Selenium concentrations in sediment and biota were elevated in exposure areas even though water concentrations were low (<5 microg/L). The pattern (from smallest to largest) of selenium accumulation was: periphyton<plankton and filterer invertebrates<detritivore and predator invertebrates<small bodied (forage) fish and predatory fish. Biomagnification of selenium resulted in an approximately 1.5-6 fold increase in the selenium content between plankton, invertebrates and forage fish. However, no biomagnification was observed between forage fish and predatory fish. Selenium content in organisms from exposure areas exceeded the proposed 3-11 microg/g (dry weight) dietary toxicity threshold for fish, suggesting that the selenium released into these aquatic systems has the potential to bioaccumulate and reach levels that could impair fish reproduction.
Authors:
J R Muscatello; A M Belknap; D M Janz
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-17
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  156     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-22     Completed Date:  2008-12-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  387-93     Citation Subset:  IM    
Affiliation:
Toxicology Centre, University of Saskatchewan, 44 Campus Drive, Saskatoon, SK S7N 5B3 Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Ecotoxicology / methods
Environmental Pollutants / analysis*,  toxicity
Fishes / metabolism
Food Chain
Food Contamination
Fresh Water / analysis
Geologic Sediments / analysis
Industrial Waste*
Invertebrates / chemistry
Mining*
Plankton / chemistry
Saskatchewan
Selenium / analysis*,  toxicity
Soil Pollutants / analysis,  toxicity
Trace Elements / analysis*,  toxicity
Uranium*
Water Pollutants, Chemical / analysis,  toxicity
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Industrial Waste; 0/Soil Pollutants; 0/Trace Elements; 0/Water Pollutants, Chemical; 7440-61-1/Uranium; 7782-49-2/Selenium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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