Biogeochemical and contaminant cycling in sediments from a human-impacted coastal lagoon – Introduction and summary

Abstract : From 2001 to 2003, the Microbent project (‘‘Biogeochemical processes at the water sediment interface in eutrophic environment’’) was carried out within the framework of the Programme National Environnement Coˆtier, the French contribution to LandeOcean Interaction in the Coastal Zone (LOICZ). The Microbent programme was focused on the study of sediment biogeochemical cycles of carbon, oxygen, sulphur, iron, nitrogen, and phosphorus in relation to the faunal activity in the sediment and their relation with the mobility of metallic contaminants at the sedimentewater interface (SWI) in a Mediterranean coastal lagoon (Thau lagoon, France; Fig. 1). The aim of Microbent was to set up an interdisciplinary study bringing together geochemists, sedimentologists, and biologists in order to understand and quantify the main reaction pathways, and the fluxes of contaminants at the SWI, including those related to benthic fauna. Work was focused on the processes which generate contaminant fluxes: (1) early diagenetic processes, which generate the chemical conditions of the environment; (2) processes leading to the transfer of contaminants from particles toward biofilms, water column, and organisms; and (3) processes of sediment mixing by organisms and sediment accumulation.
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David Amouroux, Pierre Anschutz, Jean-Marie Jouanneau, Franck Gilbert, Christophe Rabouille, et al.. Biogeochemical and contaminant cycling in sediments from a human-impacted coastal lagoon – Introduction and summary. Estuarine, Coastal and Shelf Science, Elsevier, 2007, vol. 72, pp. 387-392. ⟨10.1016/j.ecss.2006.11.022⟩. ⟨hal-00780252⟩

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