沉积硅藻具有壁厚、易溶而易于保存的特点,因此引起了国内外生物学和地质学研究者的重视。日本一些学者对日本美加湾等海区的沉积硅藻作了研究。我国金德祥等对东海表层沉积硅藻曾作过报道。本文对江苏、上海、浙江和福建北部近岸海域表层沉积硅藻的属种成分和数量分布规律进行了研究,探讨了其沉积环境。 从地质地貌看,可大致以杭州湾为界,将上述近岸海域分为南北两部分。以北近岸海底地形平坦、水浅;以南近岸海底地形复杂,岩礁多,水深变化大。 Sedimentary diatoms have the characteristics of wall thickness, easy to dissolve and easy to preserve, which has attracted the attention of researchers in biology and geology at home and abroad. Some Japanese scholars have studied depositional diatoms in areas such as the Gulf of Mexico and other areas of the Gulf of Mexico. Jinde Xiang et al. Reported on surface sediment diatoms in the East China Sea. In this paper, the species composition and abundance distribution of surface sedimentary diatoms in Jiangsu, Shanghai, Zhejiang and Fujian northern coastal waters were studied, and the sedimentary environment was discussed. In terms of geology and geomorphology, Hangzhou Bay can serve as a boundary and divide the coastal waters into two parts. The coastline to the north of the coast is flat and shallow; the coastline to the south is complicated with many reefs and large changes in water depth.