Current Status of Aquatic Macrophyte and Analysis of Its Variation in Lakeside Zone of Erhai Lake

In this paper,the species and distribution status of aquatic macrophytes in lakeside zone of Erhai Lake were surveyed. The results demonstrated that Thirty-two species of aquatic macrophytes were collected in total.They are distributed in the shallow water areas along the lakeshore,especially in the south and west lakeshore,lake bends. The dominant species include Potamogetonmaackianus,Vallisnerianata,Ceratophyllumdemersumn.The aquatic macrophyte community is divided into 11 types according to the species richness index and their composition characteristics. In April,2015,the distribution area of aquatic macrophytes in lakeside zone of the lake is1241. 86 hm²,accounting for about 5. 17% of total lake. The resources quantity is 17,600 t·FW and the average biomass is 7352. 5 g/m²·FW. Compared with the past surveys,distribution area of aquatic macrophytes in lakeside zone of Erhai Lake has reduced obviously.