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On the relative significance of bacteria for the distribution of polychlorinated biphenyls in arctic ocean surface waters
Responsible organisation
2006 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 40, no 8, 2586-2593 p.Article in journal (Refereed) Published
Abstract [en]

This study presents the first field observations of polychlorinated biphenyls (PCB) in bacteria in oceanic waters. To contribute to the limited knowledge of what role bacteria play in the dynamics of hydrophobic organic contaminants (HOCs) in surface seawater, PCB concentrations were measured in bacteria (0.2-2 mu m) collected at seven stations in the northern Barents Sea marginal ice zone (MIZ) and the central Arctic Ocean. Concentrations of individual PCB congeners in bacteria were 0.5-5 ng/g oc (organic carbon), which was as high as or higher than PCB concentrations in bulk particulate organic carbon (POC, “phytoplankton”; > 0.7 mu m). Considering the relative biomasses of phytoplankton and bacteria, the amount of PCB in bacteria was generally 5-20% of that in phytoplankton, but at two stations the bacterial biomass contained more PCBs than the phytoplankton pool. This study further showed that efficient PCB uptake in bacteria may be described by an apparent equilibrium partitioning model with linear regressions between the organic-carbon-normalized partition coefficient and the octanol-water partition coefficient (log Kbact-oc-log K-OW).

Place, publisher, year, edition, pages
2006. Vol. 40, no 8, 2586-2593 p.
National Category
Natural Sciences
Research subject
SWEDARCTIC 2001, Arctic Ocean 2001
Identifiers
URN: urn:nbn:se:polar:diva-3200DOI: 10.1021/es0524907OAI: oai:DiVA.org:polar-3200DiVA: diva2:1050076
Available from: 2016-11-28 Created: 2016-11-21 Last updated: 2016-11-28

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