摘要
沉水植被是浅水草型湖泊的生态基础,具有固定和移除氮磷营养盐、净化水质的强大功能,在滆湖富营养化进程中沉水植被逐步消亡,滆湖从草型湖向藻型湖衰退,水质急剧下降,生态功能退化。通过对滆湖近20a来水质监测及沉水植被观测成果的汇总分析,并通过滆湖大洪港沉水植被对水质影响和生物多样性维护的监测试验结果,探索滆湖富营养化进程中沉水植被的演替规律及对湖体水质影响的驱动机制,并初步提出沉水植被的重建设想。
The submerged macrophytes is the basis of the shallow-water lake ecosystem, which could fix and remove nutrients of nitrogen and phosphorus and purify the water of the lake. The submerged macrophytes has being disappearing in the process of eutrophication of the Gehu Lake and the Gehu Lake became an algal lake from a macrophytic lake in this process with a sharp degradation of water quality and ecological functions. This paper summarized the characteristics of the succession of the submerged macrophytes and the affection mechanism on the water quality in the process of eutrophication of the Gehu Lake and proposed the plan of the rehabilitation of the submerged macrophytes, which were done based on the analysis and summaries of the monitoring data of water quality, the observation of the submerged macrophytes over the past 20 years, the test results of the impacts on water quality and the maintenance of biodiversity of submerged macrophytes in the Dahonggang of the Gehu Lake.
关键词
滆湖
富营养化
沉水植被
演替
重建
Gehu Lake
Eutrophication
Submerged macrophytes
Succession
Rehabilitation
