本文是研究长江口海区表层沉积物中硅藻的种群结构、数量分布与沉积物环境之间的关系。河口区及邻近陆架海域,悬浮泥沙及有机质大量排出,环境因子多变,物质交换激烈,营养盐类富集,硅藻大量繁殖,它与水域的盐度、温度和所含的各种无机盐类氮、磷等要素有关系,并随着悬浮泥沙含量、沉降速率不同,硅藻总个体数也有所变化。王开发等(1982)根 This article is to study the relationship between the population structure and the distribution of diatoms in surface sediments in the Changjiang Estuary and the sediment environment. Estuarine area and its adjacent shelf area, a large amount of suspended sediment and organic matter are discharged, environmental factors are changing, the material exchange is intense, the nutrient salts are enriched and the diatoms multiply in large quantities. The salinity, temperature and various inorganic Salt nitrogen, phosphorus and other factors, and with the suspended sediment content, sedimentation rate, the total number of diatoms have also changed. Wang Development et al. (1982)