影响东洞庭湖浮游植物群落分布的环境因子分析

Analysis of Environmental Factors Affecting Phytoplankton Community Distribution in East Dongting Lake

为了解东洞庭湖浮游植物群落结构特征及其富营养化现状,于2020年5月、6月及8—12月对东洞庭湖7个采样点的水质情况和浮游植物群落情况进行调查.浮游植物共检出8门76种,主要由蓝藻门、绿藻门、硅藻门植物组成.再运用主成分分析(PCA)方法对调查范围内所有采样点的主要浮游植物与环境因子之间的关系进行研究,结果表明:总氮、流速、温度和pH值是影响东洞庭湖浮游植物群落分布的主要环境因子.

In order to investigate the phytoplankton community and the correlation with environmental factors in the East Dongting Lake,the samples of the phytoplankton and the aquatic environment from 7 different segments were assessed in May,June August to December of 2020.8 divisions and 76 genera including the variants were identified to be mainly composed of the Chlorophyta,Cyanophyta and Bacillariophyta.The result shows that the environmental factors such as total nitrogen,temperature,flow velocity,pH play a key role in affecting the structure and dynamics of the phytoplankton community in the East Dongting Lake.