Sediment phosphorus and iron speciation and fluxes in the Pearl River Estuary region

We measured the vertical distributions of dissolved and solid phosphorus (P) and iron (Fe) species in the sediments of the Pearl River Estuary and the adjacent shelf, calculated the effluxes of phosphate across the sediment-water interface, and estimated the recycling efficiency of P from the sediments (P efflux divided by P sedimentation).