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Partitioning of polychlorinated biphenyls between arctic seawater and size-fractionated zooplankton
Responsible organisation
2006 (English)In: Environmental Toxicology and Chemistry, ISSN 0730-7268, E-ISSN 1552-8618, Vol. 25, no 7, 1720-1728 p.Article in journal (Refereed) Published
Abstract [en]

Concentrations of hydrophobic organic contaminants in zooplankton have been hypothesized to be governed by either near-equilibrium partitioning with surrounding water, growth dilution, or biomagnification. Concentrations of 17 polychlorinated biphenyls (PCBs) were measured in size-fractionated zooplankton, in phytoplankton (> 0.7 mu m), and in the dissolved water phase (< 0.7 mu m) in the surface water of the northern Barents Sea marginal ice zone east and north of Spitsbergen (Norway) and in the central Arctic Ocean at 89 degrees N. The linear partition model was used to indirectly assess if PCBs were equilibrated between water and the extractable organic matter (EOM) of zooplankton. As an independent test, the relation between the EOM-normalized partition coefficient (log K-EOM) and trophic level (TL) of the zooplankton (based on delta N-15) was investigated. All log K-log K-OW regressions were significant (n = 18, p < 0.05, r(2) = 0.65-0.95), being consistent with near-equilibrium partitioning and indirectly suggesting the absence of biomagnification. No correlation was found between log K-EOM and TL, further supporting the apparent absence of biomagnification in zooplankton. One implication of these results is a reduced uncertainty in modeling of food web uptake, in which kinetic parameterizations of biodilution or biomagnification in zooplankton may be replaced by a simpler parameterization based on equilibrium partitioning.

Place, publisher, year, edition, pages
2006. Vol. 25, no 7, 1720-1728 p.
Keyword [en]
zooplankton; polychlorinated biphenyls; biomagnification; equilibrium partitioning; arctic
National Category
Natural Sciences
Research subject
SWEDARCTIC 2001, Arctic Ocean 2001
Identifiers
URN: urn:nbn:se:polar:diva-3196DOI: 10.1897/05-319R1.1OAI: oai:DiVA.org:polar-3196DiVA: diva2:1050084
Available from: 2016-11-28 Created: 2016-11-21 Last updated: 2016-11-28

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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