Modeling of PCB trophic transfer in the Gulf of Lions; 3D coupled model application

Type Article
Date 2018-03
Language English
Author(s) Alekseenko Elena1, 2, Thouvenin Benedicte4, Tronczynski Jacek5, Carlotti F.6, Garreau PierreORCID3, Tixier Celine, Baklouti Melika6
Affiliation(s) 1 : Russian Acad Sci RAS, PP Shirshov Inst Oceanog, SIO, Nakhimosyskiy 36, Moscow 117218, Russia.
2 : CEA Saclay, IPSL, LSCE, F-91191 Gif Sur Yvette, France.
3 : Univ Brest, IFREMER, CNRS UMR 6523, IRD,LOPS,IUEM, F-29280 Brest, France.
4 : IFREMER, Dynam Ecosyst Cotiers, BP70, F-29280 Plouzane, France.
5 : IFREMER, RBE BE LBCO, BP 21105, F-44311 Nantes, France.
6 : Univ Toulon & Var, Aix Marseille Univ, CNRS, INSU,IRD,MIO,UM 110, F-13288 Marseille 09, France.
Source Marine Pollution Bulletin (0025-326X) (Pergamon-elsevier Science Ltd), 2018-03 , Vol. 128 , P. 140-155
DOI 10.1016/j.marpolbul.2018.01.008
WOS© Times Cited 11
Keyword(s) PCBs, 3D coupled model, Gulf of Lions, Planktonic food web, CB153 fluxes

3D coupled modeling approach is used for the PCB dispersion assessment in the Gulf of Lion and its transfer to zooplankton via biogeochemical processes. PCB budgets and fluxes between the different species of PCB: dissolved, particulate, biosorbed on plankton, assimilated by zooplankton, which are governed by different processes: adsorption/desorption, bacteria and plankton mortality, zooplankton excretion, grazing, mineralization, volatilization have been estimated. Model outputs were compared with the available in situ data. It was found that the Rhone River outflows play an important role in the organism contamination in the coastal zone, whereas the atmospheric depositions are rather more important in the offshore zones. The transfer of the available contaminant to bacteria and phytoplankton species is mainly related to the biomass present in the water column. Absorption fluxes (grazing) to zooplankton are rather higher than the passive sorption fluxes, which are themselves also linked to the sorption coefficient.

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