Document Detail

The occurrence of organochlorines in marine avian top predators along a latitudinal gradient.
MedLine Citation:
PMID:  16955919     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to determine the role of cold condensation and fractionation on the occurrence of organochlorine contaminants (OCs) in avian marine top predators along a latitudinal gradient. We measured 24 polychlorinated biphenyl (PCB) congeners and six pesticide OCs in blood of great black-backed gulls (Larus marinus) from the Norwegian Coast (58 degrees N-70 degrees N) and glaucous gulls (Larus hyperboreus) from Bjornoya in the Norwegian Arctic (74 degrees N). Glaucous gulls had up to 3 times higher sigmaOC concentrations compared to the great black-backed gulls, and a OC pattern dominated largely by persistent and low volatile compounds such as highly chlorinated PCBs and metabolites such as oxychlordane. This was not consistent with cold condensation and fractionation theory, but probably related to diet and elevated biomagnification. Among great black-backed gulls, however, there were indications of both cold condensation and fractionation. Higher and lower chlorinated PCBs had highest absolute concentrations in the south and in the north, respectively, except for one location at an intermediate latitude, where concentrations of most OCs exceeded all other locations. In terms of proportional contribution to sigmaOC (pattern), relatively volatile OCs such as HCB, oxychlordane and tri- to penta- PCB congeners were more important at northern latitudes, while hexa- to nona-PCBs made up a larger proportion of sigmaOC in the south. The results thus showed that differences in global distribution of compounds with different physicochemical properties could be detected in avian top predators such as large gulls, even if biomagnification and biotransformation influence both the absolute concentrations and the patterns of OCs.
Cecilie Steffen; Katrine Borgå; Janneche U Skaare; Jan Ove Bustnes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  40     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-09-06     Completed Date:  2007-01-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5139-46     Citation Subset:  IM    
Norwegian Institute for Nature Research, Unit for Arctic Ecology, The Polar Environmental Centre, Tromsø, Norway.
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MeSH Terms
Chemistry / methods
Chlordan / analogs & derivatives,  chemistry
Chlorine / chemistry*
Environmental Exposure
Environmental Monitoring / methods*
Environmental Pollutants / analysis*
Hydrocarbons, Chlorinated / chemistry
Models, Chemical
Monte Carlo Method
Polychlorinated Biphenyls / chemistry*
Water Pollutants, Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Hydrocarbons, Chlorinated; 0/Polychlorinated Biphenyls; 0/Water Pollutants, Chemical; 12789-03-6/Chlordan; 27304-13-8/oxychlordane; 7782-50-5/Chlorine

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

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