中文摘要：

利用野外原位围隔研究了鱼类、底栖动物和水生植物的不同组合对富营养化水体的净化效果。研究结果表明,鲴鱼（Plagiognathops microlepis Bleeker）能有效削减水体中TN,高锰酸盐指数和Chl-a,其中15 g·m-3投加密度的实验组高锰酸盐指数和Chl-a的削减率提高了8%,效果优于密度7.5 g·m-3的实验组,但不利于TP的去除;螺（Bellamya aeruginosa）和蚌（Hyriopsis cumingii）的投加对水体营养盐的去除有较好的效果,其中对Chl-a的影响最为显著（p〈0.05）,投加螺和蚌之后,Chl-a的削减率相比无螺蚌的实验组提高了23.4%;2种水生植物蕹菜（Waterspinach）和水芹（Watersfennel）对水体中营养盐的去除差异不显著（p〉0.05）,蕹菜略好于水芹。本研究结果可为水生生态系统调控和修复提供科学依据。

英文摘要：

Experiments were carried out under simulation conditions in outdoor mesocosms. The puritieatmn effect of different combinations of fishes, benthic animals, and aquatic plants on eutrophication was studied. The results showed that the fish Plagiognathops microlepis Bleeker reduced TN, permanganate, and Chl-a effectively. At a density of 15 g · m-3, the removal rates of permanganate and Chl-a were 8% higher than they were at a density of 7.5 g · m-3, but P. mlcrolepis Bleeker was not conducive to TP removal efficiency. The benthic ani- mals, Bellamya aeruginosa and Hyriopsis cumingii, apparently affected water nutrient removal, as the removal rate of Chl-a increased by 23.4% when B. aeruginosa and H. cumirrgii dosing occurred. The water nutrient re- moval difference between two kinds of aquatic plants, water spinach and water fennel, was not remarkable （p 〉 0.05） , although the effect of water spinach was slightly better than that of water fennel. This research provides a scientific basis for aquatic ecosystem regulation and repair.