三亚湾春秋浮游植物分布及其与环境因子的关系

为了解三亚湾浮游植物的群落结构特征及其与环境因子之间的关系,笔者于2019年春(4月份)、秋(9月份)两季对三亚湾12个站位的浮游植物及水质进行了网采取样调查.春季采样记录浮游植物共6门82种,秋季共鉴定出浮游植物4门85种,其中硅藻门和甲藻门种类组成占优势,春、秋季硅藻门分别占55种和67种(分别占浮游植物总种类数的...

Phytoplankton distribution and its relationship with related environmental factors in Sanya Bay in spring and autumn

In recent years the economy has developed rapidly in Sanya City, Hainan Province. With the rapid development of tourism, Gulf port construction, aquaculture and other industries, the ecological environment of the coastal waters in Sanya Bay has attracted much attention. In order to understand the relationship between the phytoplankton community structure and environmental factors in Sanya Bay, a sampling survey of phytoplankton and seawater quality at 12 survey stations near the coast of Sanya Bay was made in April and September 2019. The results showed that there are a total number of 82 species of phytoplankton identified in Spring, and a total number of 85 species identified in Autumn, in which diatoms and dinoflagellates were predominant in species composition and cell abundance. There were 4 and 9 dominant species in Spring and Autumn, respectively. Chaetoceros sp, Chaetoceros indicus, Neoceratium tripos and Guinardia flaccida were dominant species in Spring, and Chaetoceros sp was the first dominant species. Thalassionema nitzschioides, Skeletonema tropicum, Hemiaulus hauckii, Asterionella japonica, Leptocylindrus danicus, Chaetoceros lorenzianus and Chaetoceros diversus were dominant species in Autumn, and Thalassionema nitzschioides was the first dominant species. The average Shannon-Wiener diversity index, Pielou evenness index and Margalef diversity index were 3.33, 3.27, 2.26 in Spring, respectively, and 4.05, 0.79, 3.09 in Autumn, respectively. The redundancy analysis showed that the main factors affecting the phytoplankton structure were total phosphorus, ammonia nitrogen and water temperature in Spring, and total nitrogen, salinity and conductivity in Autumn.