The concentration and profile characters of nutrients in sediment pore water of the South Ocean,sampled during the cruise of CHINARE-18 of the austral summer 2001/02 were determined.The results show that the content of SiO3-Si and NH4-N were much higher than other nutrients.The profile of SiO3-Si was characterized with sharp gradients near the sediment-water interface,profile distribution of silicate show that during the diagenetic reaction of silicate,dissolution was the main part.The organic matter decomposition was occurred under the anaerobic condition.Benthic fluxes of SiO3-Si,NH4-N were from pore water to overlying water,and regeneration of silicate and ammonium were the main part of the nutrient regeneration from the pore water of the study area.
展开▼