Roles of regional hydrodynamic and trophic contamination in cadmium bioaccumulation by Pacific oysters in the Marennes-Oléron Bay (France)

► Cd bioaccumulation in oysters is more efficient when reared in the water column than on the bottom. ► Metallothionein concentrations suggested different oyster metabolisms between rearing conditions. ► Different trophic Cd transfer or metabolism could induced different Cd bioaccumulation in oysters. ► Satellite images survey and sampling showed the Cd origin from the Gironde Estuary in the bay. ► Within 3 months Cd partitioning highly varied between dissolved and particulate Cd (SPM, plankton).