以沉水植被恢复为核心的富营养水体生态系统恢复已成为水域生态学研究中最重要的生态实践，生物操纵则是实施生态恢复最主要的技术手段。然而，生物操纵技术在实际应用中遇到了很多挑战，其中幼鱼特别是底栖食性幼鱼大量暴发造成的水体透明度下降对沉水植物生长抑制是其突出问题之一。项目拟选用短食物链的滤食生物-淡水蚌类为对象，通过系列受控实验以及生态修复原位实验来验证科学假设：生物操纵的同时，利用淡水蚌类抑制幼鱼特别是底栖食性幼鱼暴发所造成的高悬浮质浓度，改善水下光照条件，为沉水植物的生长与种群扩张赢得较长的清水期，从而促进沉水植被的成功恢复与清水系统的稳定。本项目的研究结果将有助于加深理解湖泊生态系统中的水层-底栖耦合关系，丰富生态系统修复的技术原理体系，并为富营养浅水湖泊的管理以及生态系统修复提供技术支撑。

Eutrophic ecosystem restoration using submerged macrophytes has become the most important ecological practice in the research on aquatic ecology while biological control is the principal approach used for ecosystem restoration. However, the implication of such approach often faces many challenges. For example, massive production of young fish, especially benthic young fish, may lead to reduced water transparency, which in turn negatively affects the restoration of the submerged macrophyte community. This study, based on control and in situ experiments, use freshwater bivalves- a short-food chain filter-feeding consumer to reduce high concentrations of suspended particles. We hypothesize that through the stocking of filter-feeding bivalves under-water light condition and water column clarity will be improved, which in turn will promote the growth and expansion of submerged macrophytes. The results from this study will be helpful to enhance our understanding of the relationship between water column and benthic coupling and the underlying mechanism on ecosystem restoration. This study will also provide technical supports for shallow eutrophic lake management and ecosystem restoration.