摘要
The major factors that govern the vertical distributions of nutrients and Fe2+, Mn2+ in pore water were studied by analyzing the concentrations of nutrients and Fe, Mn in pore water and overlying water and total organic carbon, total nitrogen, phosphorus, iron, manganese aluminum in sediments in the Yangtze Estuary, combined with early diagenesis model and geochemical thermodynamic analysis. The benthic fluxes of nutrients, Fe and Mn were calculated. The results show that the concentrations of nutrients, Fe, Mn in pore water are much higher than those in overlying water. The interstitial nutrients, iron and manganese are mainly controlled by early diagenetic processes in Yangtze Estuary sediments. The diffusive fluxes can be neglected when the authors consider the source of nutrients required by plankton in the Yangtze Estuary.