贡湖生态修复区鱼类群落结构调控对水质及沉水植物恢复的影响  

Effects of Fish Community Structure Regulation on Water Quality and Restoration of Submerged Macrophytes in Gonghu Lake Ecological Restoration Area

作　　者：潘辉 关保华[2] 钱新[3] 陆亚琪 PAN Hui;GUAN Bao-hua;QIAN Xin(Wuxi Ruijing City Service Co.,Ltd.,Wuxi,Jiangsu 214000;State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing,Jiangsu 210008;School of Environment,Nanjing University,Nanjing,Jiangsu 210023)

机构地区：[1]无锡市瑞景城市服务有限公司,江苏无锡214000 [2]中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,江苏南京210008 [3]南京大学环境学院,江苏南京210023 [4]无锡市生态湿地保护建设研究会,江苏无锡214000

出　　处：《安徽农业科学》2022年第15期70-74,94,共6页Journal of Anhui Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07101014);国家自然科学基金重点项目(31930074)。

摘　　要：针对贡湖湾退渔还湖生态修复区内沉水植物覆盖度及水体透明度出现下降趋势,通过原位围隔试验研究鱼类群落结构调控对湖体水质及沉水植物恢复的影响,结果表明,解除鱼类扰动及摄食影响后,水体透明度从0.6 m快速提升至1.5 m以上,水体中TN、TP、COD_(Mn)和浊度等水质指标均下降,2年内沉水植物覆盖度可从30%恢复到90%。生态修复区规模性鱼类种群结构调控效果表明,合理调控鱼类种群结构、及时清除大规格鱼类有助于沉水植物群落的恢复和稳定。In view of the decreasing trend of submerged vegetation coverage and water transparency in the ecological restoration area of Gonghu Bay,the effects of fish community structure regulation on lake water quality and submerged macrophyte restoration were studied by in-situ enclosure experiment,the results showed that the water transparency increased rapidly from 0.6 m to more than 1.5 m after fish disturbance and feeding disturbance was removed,and the water quality indexes such as TN,TP,COD and turbidity decreased.The submerged macrophyte community subsequently restored from 30%to 90%withiN_(2)years.The regulation effect of large-scale fish population structure in ecological restoration area showed that reasonable regulation of fish population structure and timely elimination of large-scale fish were helpful to the recovery and stability of submerged macrophyte community.

关 键 词：湖泊生态修复 沉水植物 鱼类调控 群落结构 透明度 覆盖度 

分 类 号：X171.4[环境科学与工程—环境科学]