摘要
惠州西湖是典型的热带浅水富营养化湖泊,于2004年底建立示范区,进行了鱼类调控和水生植被修复。2005年1～10月的调查结果表明:示范区总磷、悬浮物、叶绿素a的含量分别比未修复的平湖低64.0%、80.0%、63.5%,水体透明度提高了3倍以上;示范区浮游植物优势种趋向贫-中营养种类,以硅藻为主,平均密度和生物量比未修复的平湖分别低98%和93%;示范区浮游动物种类增加,丰度显著减少,优势种趋向清水态种类,大型种类增多。说明生态修复改善富营养化水质取得了良好的效果。
Huizhou West Lake is a eutrophic shallow urban lake. An ecological restoration project was carried out including planktivorous and benthivorous fish removal and macrophyte restoration in December, 2004. We investigated the situation of demonstration area and unrestored Pinghu from January to October, 2005. The result showed that the concentration of TP, SS and Chl a in demonstration area respectively decreased 64. 0% , 80.0% and 63.5 % compared with the Pinghu lake, the water transparence inceased three times. In demonstration area the dominant species of phytoplankton tended to meso-oligosaprobic algae and changed from blue-green-algae in Pinghu lake to diatom, at the same time the abundance and biomass of phytoplankton respectively decreased 98% and 93% compared with the Pinghu lake. The number of zooplankton species increased and the abundance of largesized species included cladocerans and copepods increased, but the abundance of rotifers decreased significantly, at the same time the preponderant species in demonstration area tended to change to clear water species. The water quality in demonstration area improved greatly through ecological restoration.
出处
《水生态学杂志》
北大核心
2009年第6期30-35,共6页
Journal of Hydroecology
基金
广东省科技计划项目(2006B36703003)
广东建设职业技术学院项目(08-2-21)
关键词
富营养化
生态恢复
浮游生物
惠州西湖
Eutrophication
Ecological restoration
Plankton
Huizhou West Lake
