鱼类群落调控在浅水湖泊生态修复中的作用:以傀儡湖为例

鱼类是湖泊食物网中的重要消费者, 占据食物网多个营养级。通过食物网营养级联效应, 鱼类对湖泊生物群落结构和水环境可产生重要影响。本研究以长江中下游浅水湖泊——傀儡湖为例, 研究了基于不同饵料类群渔产潜力估算前提下食鱼性鱼类、滤食性鱼类、碎屑食性鱼类的组合放养技术, 并探讨了底层杂食性鱼类针对性捕捞的复合调控策略对傀儡湖鱼类群落结构、沉水植物群落和水质产生的影响, 旨在揭示鱼类群落调控在优化湖泊生态系统结构方面的重要作用, 为湖泊生态修复提供新的思路和手段。

Roles of fish assemblage regulation on ecological restoration in a shal-low lake: A case study from the Kuilei Lake, China

Fish are important consumers in the food web of lakes. Fish can have different diets and can therefore occupy multiple trophic levels in the food web, thereby strongly affecting aquatic organisms and environment through trophic cascade. In the present study, we first summarize the key mechanisms and methods of biomanipulation by regulating fish assemblage. We also consider the example of Kuilei Lake, a shallow lake located in the middle and lower reaches of the Yangtze River, to elaborate on the ecological effects of integrated biomanipulation, which combines the enhancement and release of planktivorous, carnivorous, and detrivorous fish species and the removal of omnivorous fish species. Our results demonstrated the positive effects of integrated biomanipulation in optimizing the fish assemblage, water quality, and submerged plant in such a shallow lake. In conclusion, the study summarizes the impact of fish community regulation in optimizing lake ecosystems and provides new ideas and means for lake restoration.