长湖圆心湖区高等水生植物群落调查

Investigation of Community Characteristics of Macrophytes in Yuanxinhu Area of Changhu Lake

于2015年7月对湖北长湖圆心湖区域的水生植物进行了调查,结果显示,该区域现有水生植物18种;生物量变化范围为124.17~1250.35g/m2,Shannon-Wiener指数（H′）变化范围为0.56~1.98,Simpson指数（D）变化范围为0.17~0.67,其中菹草的生物量、H′、D均为最大值;群丛以菹草形成的单一优势种群丛为主,其他若干种类与菹草形成的群丛仅零星分布。对比该区域以往的数据发现：湖区内的水生植物种类及群丛的多样性正在逐渐消失。建议大力减少围网养殖面积,减少工业及生活废水的排放并使用生态修复的手段减缓该区域高等水生植物多样性的消失。

Based on previous results and data of field investigation obtained in July,2015,the distribution and community diversity of macrophytes in Yuanxinhu Area of Changhu Lake are studied.The result shows that there are 18 species of macrophytes existing in the area,biomass of species is ranged from 124.17g/m2 to 1250.35g/m2,Shannon-Wiener Indices are varied from 0.56 to 1.98,while the scale of Simpson index changes(D)is from 0,17 to 0.67,in which the biomass,Shannon Index and Simpson Index of the potamogeton crispus are at the maximum level,other species,however,are only distributed in much smaller area.Compared with previous data,the diversity and coverage of macrophytes are gradually disappeared.It indicates that human disturbances and water eutrophication are the main reasons causing such decrease.Hence,the reduction of waste water discharging and ecological remedy technology are highly advised to help to restore the ecological equilibrium in the area.