巢湖万年埠沿岸浮游植物与环境因子关系

The Relationship between Phytoplankton and Related Environmental Factors in the Littoral Zone of Wannianbu,Chaohu Lake

[目的]研究沿岸浮游植物与环境因子的关系。[方法]于2015年1～12月在巢湖西半湖万年埠进行了浮游植物统计和相关环境因子监测分析。应用CANOCO 4．5软件对获得的浮游植物数据和环境因子数据进行了RDA分析，并作出了物种分布和环境因子关系的二维排序图。[结果]共鉴定出浮游植物8门43属63种，群落组成以蓝藻、硅藻、隐藻和绿藻为主，月藻类密度为1．51×10^6～200．00×10^6个／L。 RDA分析表明，1～4月，微囊藻和鱼腥藻主要受TN和NO3－N的影响，而5～10月，微囊藻和鱼腥藻主要受T、pH、TP、PO4－P、DTP和TN的影响。[结论]该研究为巢湖水华治理提供了科学依据。

[Objective] To study on the relationship between phytoplankton and related environmental factors.[Method] Statistics and envi-ronmental factors analysis of phytoplankton were carried in the littoral zone of Wannianbu, Chaohu Lake from January to October in 2010.Re-dundancy analysis was applied to explore the relationship between phytoplankton and related environmental factors using CANOCO 4.5.The species-environment biplots were drawn based on the result of RDA.[ Result] The results showed that phytoplankton had 63 species belong to 43 genera of 8 phyla.The phytoplankton community was dominated by Cyanophyta, Cyanophyta, Cryptophyta and Chlorophyta.The phyto-plankton had an abundance ranging from 1.51 ×10^6 to 200.00 ×10^6 cells/L.Microcystis and Anabaena were remarkably affected by TN and NO3-N during Jan.-Apr..However, Microcystis and Anabaena were remarkably affected by T, pH, TP, PO4-P, DTP and TN During May-Oct.[ Conclusion] The study can provide scientific basis for algal bloom control in Chaohu Lake.