Biogenic silica in the surface sediment of Sishili Bay, Yantai
烟台四十里湾表层沉积物中生物硅的研究

Surface sediment samples were collected at 16 stations in Sishili Bay and biogenic silica (BSi) were investigated to discuss the environmental indication to the bay. Results showed that the high values of BSi in the sewage discharge area and the dumping area (average value: 0.71% and 0.78%, respectively) corresponding to eutrophication conditions; BSi value was low along the shipment channel, which agreed with the low productivity as a result of shipping disturb. Good correlation was showed between BSi and phytoplankton and nutrient concentration of up water. The research showed hydrodynamic environment could affect the sedimentation of BSi in a certain degree and the pearson correlation showed that grain size characteristics played an important role of preservation of BSi.