Growth Status of the Microcystis in Water before and after Being Treated by Wetlands of Lake Dianchi

After cultivating Microcystis wesenbergii,Microcystis viridis and Microcystis aeruginosa in the water samples collected from the peripheral and internal wetlands of Lake Dianchi,the changes in the number of Microcystis were detected.From the data,the upward trend of the total number of Cyanobacteria cells in the water samples of the internal wetland was significantly lower than the peripheral water wetlands.In the water samples from the peripheral wetland,three species of Microcystis reproduction speed was Microcystis aeruginosa Microcystis wesenbergii Microcystis viridis,and Microcystis aeruginosa was the dominant algae.In the water samples of the internal wetland,the reproduction rate of Microcystis was as followed:Microcystis aeruginosa ≈ Microcystis wesenbergii Microcystis viridis.Three kinds of Microcystis had the same proportion compared with the sample before being cultivated,and Microcystis was not the dominant algae.The results demonstrated that wetlands could change the reproduction rate of Microcystis effectively and the dominant algae populations,inhabit the number of Cyanobacteria in water significantly,then could reach the purpose of water purification.