Document Detail


Organochlorine contaminants in seven species of Arctic seabirds from northern Baffin Bay.
MedLine Citation:
PMID:  14720475     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Organochlorine contaminants (OCs) were determined in liver and fat of seven species of seabirds (Alle alle, Uria lomvia, Cepphus grylle, Rissa tridactyla, Pagophila eburnea, Larus hyperboreus, and Fulmaris glacialis) collected in May/June 1998 from the Northwater Polynya in northern Baffin Bay. OC concentrations ranged over an order of magnitude between seabird species and OC groups, with PCBs having the highest concentrations followed by DDT, chlordane, HCH and ClBz. Positive relationships between delta15N (estimator of trophic level) and OC concentrations (lipid basis) were found for all OC groups, showing that trophic position and biomagnification significantly influence OC concentrations in Arctic seabirds. Concentrations of a number of OCs in particular species (e.g., HCH in P. eburnean) were lower than expected based on delta15N and was attributed to biotransformation. P. eburnea and F. glacialis, which scavenge, and R. tridactyla, which migrate from the south, were consistently above the delta15N-OC regression providing evidence that these variables can elevate OC concentrations. Stable isotope measurements in muscle may not be suitable for identifying past scavenging events by seabirds. OC relative proportions were related to trophic position and phylogeny, showing that OC biotransformation varies between seabird groups. Trophic level, migration, scavenging and biotransformation all play important roles in the OCs found in Arctic seabirds.
Authors:
Andrea H Buckman; Ross J Norstrom; Keith A Hobson; Nina J Karnovsky; Jason Duffe; Aaron T Fisk
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  128     ISSN:  0269-7491     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2004  
Date Detail:
Created Date:  2004-01-14     Completed Date:  2008-01-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  327-38     Citation Subset:  IM    
Affiliation:
Department of Environmental Biology, University of Guelph, Guelph, ON, Canada N1G 2W1.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue / metabolism
Animals
Arctic Regions
Birds / metabolism*
Carbon / analysis
Environmental Monitoring
Environmental Pollutants / metabolism*
Female
Food Chain
Hydrocarbons, Chlorinated / metabolism*
Liver / metabolism
Male
Nitrogen Isotopes / analysis
Pectoralis Muscles / metabolism
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Hydrocarbons, Chlorinated; 0/Nitrogen Isotopes; 7440-44-0/Carbon

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


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