Document Detail


Seasonal PCB bioaccumulation in an arctic marine ecosystem: a model analysis incorporating lipid dynamics, food-web productivity and migration.
MedLine Citation:
PMID:  19950940     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Primary production and species' lipid contents in Arctic ecosystems are notoriously seasonal. Additionally, seasonal migration patterns of fish may alter prey availability and thus diet. Taking the southern Barents Sea as a study region and PCBs as model contaminants, we examined to what extent each of these factors cause bioaccumulation in fish to change throughout the year. Data on physiology and standing stocks of multiple trophic levels were used to estimated season-specific carbon budgets and by inference also corresponding values for food ingestion and production of cod, capelin, and herring. When combining these values with Arctic lipid dynamics for bioaccumulation model parameter setting, we predicted bioaccumulation factors (BAFs) that were in good agreement with BAFs for cod and capelin observed between 1998 and 2008. BAFs in all fish were 10 times lower in summer than in spring and fall/winter and were mainly driven by lipid dynamics. Trophic magnification factors (TMFs: increase in BAF per unit increase in trophic level as derived from our carbon budgets) were highest for PCB 153 during spring (2.3-2.4) and lowest for PCB 52 in summer and fall/winter (1.5-1.6) and were driven by seasonal shifts in trophic level and lipid dynamics.
Authors:
Frederik De Laender; Dick Van Oevelen; Sylvia Frantzen; Jack J Middelburg; Karline Soetaert
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental science & technology     Volume:  44     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2009-12-30     Completed Date:  2010-03-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  356-61     Citation Subset:  IM    
Affiliation:
NIOO-KNAW, Centre for Estuarine and Marine Ecology, Netherlands Institute of Ecology, Korringaweg 7, 4400 Yerseke, The Netherlands. frederik.delaender@ugent.be
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MeSH Terms
Descriptor/Qualifier:
Animals
Arctic Regions
Ecosystem*
Fishes / metabolism
Food Chain*
Lipid Metabolism*
Models, Theoretical*
Polychlorinated Biphenyls / metabolism*
Seasons*
Seawater*
Chemical
Reg. No./Substance:
0/Polychlorinated Biphenyls

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


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