Auger Pierre Amaël auteur aut IRD Machu Eric auteur aut IRD Gorgues T. auteur aut IRD Grima N. auteur aut IRD Waeles M. auteur aut IRD text journalArticle eng text/pdf born digital access A Lagrangian approach based on a physical-biogeochemical modeling was used to compare the potential transfer of cadmium (Cd) from natural and anthropogenic sources to plankton communities (Cd-uptake) in the North-West African upwelling. In this region, coastal upwelling was estimated to be the main natural source of Cd while the most significant anthropogenic source for marine ecosystem is provided by phosphate industry. In our model experiment, Cd-uptake (natural or anthropogenic) in the North-West African upwelling is the result of an interplay between the Cd dispersion (by advection processes) and the simulated biological productivity. In the Moroccan waters, advection processes limit the residence time of water masses resulting in a low natural Cd-uptake by plankton communities while anthropogenic Cd-uptake is high. As expected, the situation is reversed in the Senegalo-Mauritanian upwelling where natural Cd-uptake is higher than anthropogenic Cd-uptake. Based upon an estimate of Cd sources, our modeling study shows, unexpectedly, that the anthropogenic signal of potential Cd-bioaccumulation in the Moroccan upwelling is of the same order of magnitude as the natural signal mainly present in the Senegalo-Mauritanian upwelling region. A comparison with observed Cd levels in mollusk and fishes, which shows overall agreement with our simulations, is confirming our estimates. specialized METAL LOURD MILIEU MARIN ZONE COTIERE PLANCTON ACCUMULATION POLLUTION MARINE POLLUTION CHIMIQUE PHOSPHATE MODELISATION UPWELLING ADVECTION MARINE DISPERSION VARIATION SAISONNIERE BIOACCUMULATION AFRIQUE DU NORD MAROC MAURITANIE SENEGAL ATLANTIQUE 032MILPHY 036MILMAR 038POLLIT 505 870-888 2014 1879-1026 https://www.documentation.ird.fr/hor/fdi:010063272 10.1016/j.scitotenv.2014.10.045 1879-1026 [F B010063272] https://www.documentation.ird.fr/hor/fdi:010063272 https://www.documentation.ird.fr/intranet/publi/depot/2014-12-12/010063272.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-12-12 2015-06-22 fdi:010063272 fre