春季松阿察河及周边水域浮游植物群落结构及多样性分析

Community Structure and Diversity Index of Phytoplankton in Songacha River in Spring

2013年5月对松阿察河及周边水域浮游植物群落进行调查和相关研究,共检出浮游植物7门111种,其中绿藻门种数最多,59种;硅藻门次之,24种;另外还有蓝藻门14种、金藻门6种、裸藻门5种、隐藻门2种,和甲藻门1种。7个采样点浮游植物丰度变化明显,最低为50.4×104个/L,最高为416.4×104个/L。采用Shannon-weaver指数、Pielou指数分析浮游植物多样性和评价水质状况,同时运用典范对应分析(CCA),在多因子作用下对浮游植物群落结构进行分析。结果表明:7个采样点不同程度处于中污染、轻污染或无污染状态。典范对应分析CCA的结果表明:总磷、浊度、温度、总氮,和化学需氧量对浮游植物的分布有显著的影响。

Community structure and diversity index of phytoplankton were surveyed in seven sampling sites in Songacha River in May 2013. A total of 111 species was observed including 59 in Chlorophyta, 24 in Bacillariophyta, 14 in Cyanophyta, 6 in Chrysophyta, 5 in Euglenophyta, 2 in Cryptophyta and 1 in Pyrroophyta. Abundance of phytoplankton was changes significantly in different sampling sites, the minimum 50.4 × 10^4/L, the maximum 416.4 × 10^4/L. Canonical correspondence analysis （CCA） was applied to explore the relationship between phytoplankton composition, and the Shannon-weaver phytoplankton diversity index and Pielou index were used to evaluate diversity ofphytoplankton and water quality. It was found that 7 sampling sites were under different level of pollution, light pollution or non-pollution. The main factors affecting the distribution of phytoplankton community were total phosphorus, turbidity, temperature, total nitrogen and chemical oxygen demand （COD）.