Abstract: In this paper, surface sediment samples were collected from Zhelin Bay from July 2002 to July 2003, and their total phosphorus (TP), organic phosphorus (OP), and different types of inorganic phosphorus were analyzed. The results indicated that the spatial distribution of various phosphorus forms was related to the grain size of sediments, and influenced by the sewage discharges and effluents from cultivation ponds in the coastal areas. In inorganic phosphorus, authigenic phosphorus (Au-P) was the dominant portion, accounting for 47.3% of TP, while iron-bound phosphorous (Fe-P) had the lowest content. OP occupied 19.5 % of TP. The bioavailable phosphorus including extractable phosphorous (Ex-P), Fe-P, OP and Au-P accounted for 35.7%～83.0% of TP, which was much higher than that in other bays in the world.

Key words: Interaction, Fish, Cu, Pb, Bioaccumulation