TY - JOUR T1 - Cadmium in the waters off South Morocco: Nature of particles hosting Cd and insights into the mechanisms fractionating Cd from phosphate A1 - Waeles,Mathieu A1 - Planquette,Helene A1 - Afandi,Imane A1 - Delebecque,Nina A1 - Bouthir,Fatimazohra A1 - Donval,Anne A1 - Shelley,Rachel U. A1 - Auger,Pierre-Amael A1 - Riso,Ricardo D. A1 - de Morais,Luis Tito AD - Univ Bretagne Occidentale, LEMAR UMR CNRS 6539, IUEM, F-29269 Brest, France. AD - Inst Natl Rech Halieut, Casablanca, Plouzane, Morocco. AD - Pontificia Univ Catolica Valparaiso, Inst Milenio Oceanog, Valparaiso, Chile. AD - Pontificia Univ Catolica Valparaiso, Escuela Ciencias Mar, Valparaiso, Chile. AD - Inst Rech Dev, UMR LEMAR 195, Plouzane, France. UR - https://archimer.ifremer.fr/doc/00334/44520/ DO - 10.1002/2016JC011688 N2 - In this study, we report the distributions of total dissolvable cadmium and particulate cadmium from 27 stations in southern Moroccan coastal waters (22°N–30°N), which is part of the North-West African upwelling system. These distributions were predominantly controlled by upwelling of the North Atlantic Central Waters (NACWs) and uptake by primary production. Atmospheric inputs and phosphogypsum slurry inputs from the phosphate industry at Jorf Lasfar (33°N), recently estimated as an important source of dissolved cadmium (240 t Cd yr−1), are at best of minor importance for the studied waters. Our study provides new insights into the mechanisms fractionating cadmium from phosphate. In the upper 30 m, the anomalies observed in terms of Cd:P ratios in both the particulate and total dissolvable fractions were related to an overall preferential uptake of phosphate. We show that the type of phytoplanktonic assemblage (diatoms versus dinoflagellates) is also a determinant of the fractionation intensity. In subsurface waters (30–60 m), a clear preferential release of P (versus Cd) was observed indicating that remineralization in Oxygen Minimum Zones is a key process in sequestering Cd. Y1 - 2016/05 PB - Amer Geophysical Union JF - Journal Of Geophysical Research-oceans SN - 2169-9275 VL - 121 IS - 5 SP - 3106 EP - 3120 ID - 44520 ER -