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Trophodynamics of mercury and other trace elements in a pelagic food chain from the Baltic Sea
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
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2009 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 407, no 24, 6267-74 p.Article in journal (Refereed) Published
Abstract [en]

Mercury (Hg) and 13 other trace elements (Al, Ti, V, Cr, Fe, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) were measured in phytoplankton, zooplankton, mysis and herring in order to examine the trophodynamics in a well-studied pelagic food chain in the Baltic Sea. The fractionation of nitrogen isotopes (delta(15)N) was used to evaluate food web structure and to estimate the extent of trophic biomagnification of the various trace elements. Trophic magnification factors (TMFs) for each trace element were determined from the slope of the regression between trace element concentrations and delta(15)N. Calculated TMFs showed fundamental differences in the trophodynamics of the trace elements in the pelagic food chain studied. Concentrations of Al, Fe, Ni, Zn, Pb and Cd showed statistically significant decreases (TMF<1) with increasing trophic levels and thus these trace elements tropically dilute or biodilute in this Baltic food chain. Cu, As, Cr, Mn, V, Ti and Co showed no significant relationships with trophic levels. Hg was unique among the trace elements studied in demonstrating a statistically significant increase (TMF>1) in concentration with trophic level i.e. Hg biomagnifies in this Baltic food chain. The estimated TMF for Hg in this food chain was comparable to TMFs observed elsewhere for diverse food chains and locations.

Place, publisher, year, edition, pages
2009. Vol. 407, no 24, 6267-74 p.
Keyword [en]
Metal; Mercury; Biomagnification; Biodilution; Stable isotopes; Food chain; Baltic Sea
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-34624DOI: 10.1016/j.scitotenv.2009.08.032ISI: 000272153000018PubMedID: 19767059OAI: oai:DiVA.org:su-34624DiVA: diva2:285312
Available from: 2010-01-11 Created: 2010-01-11 Last updated: 2017-12-12Bibliographically approved

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