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Influence of contaminant burial depth on the bioaccumulation of PCBs and PBDEs by two benthic invertebrates (Monoporeia affinis and Marenzelleria spp.)
Stockholm University, Faculty of Science, Department of Systems Ecology.
2011 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 85, no 9, 1444-1451 p.Article in journal (Refereed) Published
Abstract [en]

The bioaccumulation of buried polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) added to specific depths in sediment (2.0-2.5, 5.0-5.5 and 10.0-10.5 cm) was studied in two infaunal species with similar feeding habits (surface deposit-feeders) but different bioturbation modes. The deep-burrowing polychaetes Marenzelleria spp. (Mz) displayed up to 36 times higher tissue concentrations of buried (spiked) contaminants than the surface-dwelling biodiffusing amphipod Monoporeia affinis. The differences in bioaccumulation were most pronounced for less hydrophobic contaminants due to the bioirrigating activity of Mz. Contaminants buried at shallow depths displayed higher accumulation than more deeply buried contaminants. In contrast, the bioaccumulation of unspiked (native) contaminants with a unifo vertical distribution in the sediment was similar between the species. For Mz, the BSAFs increased with increased K(ow) for the uniformly distributed contaminants, but decreased for the buried contaminants, which indicates that the dominant uptake routes of the buried contaminants can differ from the uniformly distributed contaminants. The surface sediment concentration of buried contaminants increased in Mz treatments, showing that Mz bioturbation can remobilize historically buried contaminants to the biologically active surface layer and increase the exposure for surface-dwelling species.

Place, publisher, year, edition, pages
2011. Vol. 85, no 9, 1444-1451 p.
Keyword [en]
Bioturbation, BSAFs, Sediment pollution, Baltic Sea, Invasive species
National Category
Natural Sciences
URN: urn:nbn:se:su:diva-71140DOI: 10.1016/j.chemosphere.2011.08.024ISI: 000298459000005OAI: diva2:483943
authorCount :4Available from: 2012-01-26 Created: 2012-01-26 Last updated: 2012-01-26Bibliographically approved

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Gunnarsson, Jonas S.
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