Effect of Nutrients and Antioxidant Enzyme Activities from Microcystis aeruginosa

Microcystis aeruginosa is a major primary producer and a common toxic cyanobacterium, playing an important role in the aquatic environment (Chen et al., 2016). Microcystis aeruginosa is commonly observed in highly eutrophic lakes (Watanabe and Oishi, 1985). In recent years, surface cyanobacterial bloom occurred frequently in most large shallow lakes in China, such as Lake Taihu (Zhang et al., 2009), Lake Dianchi (Shen et al., 2004) and Lake Chaohu (Liu, 2007), especially in summer, resulting from eutrophication caused by human activities. There are many studies on the factors that lead to water bloom and close relation between water bloom and concentration of nutrients, particularly phosphorus level was reported (Hecky and Kilham, 1988).Some researches indicated that the decline of cyanobacterial bloom was accompanied with the decrease in dissolved phosphorus (Chen et al., 2005).