PCB concentrations in plankton size classes, a temporal study in Marseille Bay, Western Mediterranean Sea

Type Article
Date 2014-12
Language English
Author(s) Tiano Marion1, 2, Tronczynski Jacek2, Harmelin-Vivien Mireille1, Tixier Celine2, Carlotti Francois1
Affiliation(s) 1 : Aix Marseille Univ, Univ Toulon, IRD, CNRS,MIO UM 110, F-13288 Marseille, France.
2 : IFREMER, Ctr Atlantique RBE, Unite Biogeochim & Ecotoxicol, Lab LBCO, F-43311 Nantes 03, France.
Source Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2014-12 , Vol. 89 , N. 1-2 , P. 331-339
DOI 10.1016/j.marpolbul.2014.09.040
WOS© Times Cited 14
Keyword(s) PCBs, Phytoplankton, Zooplankton, Bioaccumulation, Coastal, Bay of Marseille
Abstract PCB levels in plankton were investigated in the Bay of Marseille, Western Mediterranean Sea, between September 2010 and October 2011. Concentrations of PCB congeners (CB 18, CB 52, CB 101, CB 118, CB 138, CB 153, CB 180) were determined in three plankton size-classes (60–200, 200–500 and 500–1000 μm) together with different parameters: chlorophyll content, plankton dry-weight biomass, carbon and nitrogen stable isotope ratios and plankton-community structure. The ∑PCB7 concentrations ranged between 14.2 and 88.1 ng g−1 d.w., for all size classes and all sampling periods. The results do not show the biomass dilution effect and indicate moderate but significant biomagnification with plankton trophic position estimated by δ15N signatures. Equilibrium with water phase may notably contribute in controlling the PCB levels in the plankton. More generally, presented results imply that PCB accumulation in the plankton is an effect of abiotic and trophic complex interactions in the Bay of Marseille.
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