惠州西湖浮游动物群落对生态恢复的响应

惠州西湖是典型的亚热带浅水城市湖泊,目前处于富营养化状态.2004年12月,惠州西湖开展了以水生植被构建和鱼类调控为主的生态系统恢复示范工程,以控制湖泊富营养化,改善湖泊水质.通过2005年1～10月对惠州西湖生态恢复示范区中浮游动物变化的调查分析,结果表明:与未修复的平湖相比,示范区水质和富营养化状况得到明显改善,浮游动物种类增加,枝角类和桡足类丰度增加,而轮虫丰度显著降低,多样性指数随之增加,优势种趋向清水型种类.

The Response of Zooplankton Community to Ecological Restoration in Huizhou West Lake

Huizhou West Lake is a eutrophic shallow urban lake. In order to control the eutrophication and restore the water quality,an ecological restoration project was carried out including planktivorous and benthivorous fish removal and macrophyte restoration in December,2004.We investigated the zooplankton of demonstration area and un-restored Pinghu from January to December,2005.The results showed that,in demonstration area,the water quality was improved greatly,the number of zooplankton species increased and the abundance of large-sized species included cladocerans and copepods increased.But the abundance of rotifers decreased significantly.Accordingly the index of diversity enhanced,at the same time the preponderant species in demonstration area tended to change to clear water species.