沙溪流域支流浮游生物多样性调查研究

Study on Plankton Diversity of the Tributaries in the Shaxi River Watershed

2013年3月对三明沙溪各水系水体进行浮游生物群落的定性定量调查,分析浮游生物组成、密度、生物量及多样性,并利用浮游植物的密度和生物量的评价标准及群落多样性指数等进行了水质综合评价。结果表明:在沙溪流域各采样点共鉴定出浮游植物8门59属189种,以硅藻、蓝藻和绿藻为主,浮游动物主要有包括原生动物门和轮虫;通过对浮游生物的生物量分析得出该流域各采样点均为极贫营养型,对浮游生物的密度分析得出各采样点均为贫营养级;通过对浮游植物的多样性分析,流域总体水体水质良好。

Qualitative and quantitative investigation was carried out at the Shaxi River watershed in March of 2013, which the structure,density, biomass and diversity of plankton community were analyzed, and the water quality by density, biomass and diversity of plankton were comprehensively evaluated. The results showed as follows： 8 genera and 189 species phytoplankton were identified, diatom was the main phytoplankton, Chlorophyta and Cyanophyta followed.Protozoa and rotifers were the main zooplankton. Accordingto the plankton biomass analysis, all sampling points in the watershed were extremely oligotrophic type. According to the plankton density analysis, all sampling points were oligotrophic type. Through the diversity analysis of phytoplankton, the overall water quality of Shaxi River water shed is good.