A comparison of PCB bioaccumulation factors between an arctic and a temperate marine food web
2010 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 408, no 13, 2753-2760 p.Article in journal (Refereed) Published
To test how environmental conditions in the Arctic and the resulting ecological adaptations affect accumulation of persistent organic pollutants (POPs) in the marine food web, bioaccumulation of four polychlorinated biphenyls (PCBs) in an arctic (Barents Sea 77°N - 82°N) and a temperate marine (Baltic Sea 54°N - 62°N) food web were compared. Three different trophic levels were studied (zooplankton, fish, seal), representing the span from first-level consumer to top predator. Previously published high-quality data on PCB water concentrations in the two areas were used for calculation of bioaccumulation factors (BAF). The BAFArctic : BAF Temperate ratios were above 1 for all four PCB congeners in zooplankton (6.4-13.8) and planktivorous fish (2.9-5.0), whereas the ratios were below 1 in seal. The mean ratio between arctic and temperate BAFs for all trophic levels and congeners (BAFArctic : BAFTemperate) was 4.8. When the data were corrected for the seawater temperature difference between the two ecosystems, the ratio was 2.0. We thus conclude that ecological or physiological adaptations of organisms and systems to arctic conditions do at most marginally affect bioaccumulation. Lower seawater temperature lead to a marked thermodynamically favoured passive partitioning to organic matrices and thus elevated ambient BAFs in the Arctic compared with the Baltic Sea. This implies that bioaccumulation in the Arctic may be described in the same way as bioaccumulation in temperate regions, e.g. by the use of mechanistic models parameterised for the Arctic.
Place, publisher, year, edition, pages
2010. Vol. 408, no 13, 2753-2760 p.
Barents Sea, Baltic Sea, Food web uptake, Temperature, Polychlorinated biphenyls, Seal, Fish, Zooplankton
Pharmacology and Toxicology Ecology
Research subject Ecotoxicology
IdentifiersURN: urn:nbn:se:uu:diva-120421DOI: 10.1016/j.scitotenv.2010.03.013ISI: 000278678200013OAI: oai:DiVA.org:uu-120421DiVA: diva2:303300