Characteristics of Phytoplankton Community in typical lakes of Inner Mongolia and Its Relationship with Environment Factors in Autumn
内蒙古典型湖泊秋季浮游植物群落特征及与环境变量的关系

Phytoplankton assemblages and environmental factors of Hulun Lake, Wuliangsu Lake and Dai Lake were investigated in August, 2011. The water quality was not optimistic in Inner Mongolia and the studied lakes all were eutrophicated. According to the Chinese Standard of Surface Water Environment Quality (GB3838-2002), some environmental indicators above the water quality standards of grade III. Cyanobacterium was the dominant species in Hulun Lake and Wuliangsu Lake, while Oocystis sp was the dominant species in Dai Lake due to its special water ecological environment. Results of CCA indicated that Cd and CODMn were the key factors influenced phytoplankton succession in Dai Lake, TP and BOD5 were the key factors in Wuliangsu Lake, and many other variables were the key factors in Hulun Lake.