【摘要】 根据现状调查和历史资料收集,对异龙湖湿地大型水生植物进行了特征分析。结果显示:20世纪50年代以来,异龙湖水生植物群落发生了结构性变化,大型水生植物之前为广泛分布的芦苇群落、薏苡群落、水葱群落,以及种类繁多的沉水植物群落。目前,湖泊中沉水植物已消失殆尽,异龙湖由草型湖泊转变为藻型湖泊;湖滨湿地大型水生植物群落类型相对较单调,为挺水植物类型,主要以荷花群落和香蒲群落为主,建议在湖滨湿地恢复工程中选择植物物种时可优先考虑此2种植物。另外,近期调查显示异龙湖湖滨已有少量眼子菜科植物出现,在一定程度上显示其沉积物种子库中仍存在具有活力的沉水植物繁殖体,对于水质改善后恢复水体中的沉水植被具有一定指导意义。更多还原

【Abstract】 Aquatic macrophytes in terms of community features in the wetland of Yilong Lake catchment were analyzed on the basis of the status-quo survey and historical data. The analysis thus suggested that since the 1950 s,the structure of aquatic macrophyte communities in Yilong Lake had been changed. Previously widespread aquatic macrophyte communities were the communities such as phragmites,coix and Scirpus validus,as well as a wide variety of submerged aquatic plant communities. At present,submerged plants in Yilong Lake had perished,and the aquatic macrophytes were mainly emergent plants,hence the lake has been changed from macrophytic into algal lake. Aquatic macrophytes community in Yilong Lake wetland was relatively simple in species and lotus and cattails were typical of the emergent plant,which was recommended to use in local wetland restoration project. Nevertheless,potamogetonaceous plant in small quantity appeared in riparian Yilong Lake recently,indicating that,to a certain extent,viable submerged plant propagules still existed in the seed bank deposits,the fact of which would be useful in submerged community restoration in future.更多还原