富营养化是我国面临的主要水环境问题之一，营养盐输入的控制与水体营养盐的去除是富营养水体修复的关键。目前，有关富营养水体中营养盐的原位去除仍缺乏有效的机理研究。本项目以附着生物对水体营养盐循环及滞留能力的影响等方面已取得的研究成果为基础，结合牧食螺类与附着生物的营养关系等生态学原理，采用实验生态学的研究方法，通过比较附着生物的生长与营养盐富集的速率以及螺类对附着生物生物量的去除效果，筛选出适宜的人工附着基材料与结构以及牧食动物种类，并分析水环境条件、附着基布设及螺类移出方式等对附着生物生长与营养盐富集效率的影响，构建并优化附着生物－牧食螺类复合系统，从而达到持续高效去除富营养水体中营养盐的目的。本研究结果不仅可丰富受损水生态系统生态修复的研究内容，而且可为富营养水体的生态修复提供技术支撑。

Eutrophication in natural waters is one of the main environmental problems in China, and nutrient input control and the removal is the key to restore impaired water bodies. At present, there is a lack of effective techniques fo the removal of nutrient s from eutrophic waters. Built on research results from our previous studies on the role of periphyton on nutrient cycling and retention , combined with ecology principle for grazing snails and periphyton nutrient relations, ,this proposal suggests a project using the research methods of experimental ecology, which will compare periphyton growth , nutrient enrichment and periphyton biomass removal rate by snails. So that suitable artificial attachment material and structure as well as the grazing animal species will be determined, The impact of aquatic environment condition, substrate attachment and snails from the way on periphyton growth and nutrient enrichment efficiency will be evaluated, This study will help optimize periphyton - grazing snails composite system, in order to achieve the sustainable and efficient removal of nutrientsfrom the eutrophic waters. The results of this study can enrich the knowledge of research on damaged aquatic ecosystems and provide technical support for ecological restoration of eutrophic lakes.