生态工程中食物链组合的环分析

本文研究了一个用于治理水体生态系统富营养化的生态工程，应用环分析方法对工程中的食物链的组合进行了分析。在这里，贝类被用于清除过量的藻类；种植水生植物改变营养的流转途径并且放养食植性鱼类，通过捕捞鱼和贝，使水体中的有机物和无机盐沿着从藻类到贝类和从水生植物到食植性鱼类两条途径由水体生态系统中输出，应用环分析的手段，可以调整生态工程中食物链的组合结构，使整个生态工程具有某种特定的功能。

LOOP ANALYSIS FOR THE COMBINATION OF FOOD CHAINS IN ECOLOGICAL ENGINEERING

An ecological engineering for treating eutrophication is studied. Loop analysis is used for analysing the combination of food chains in the ecological engineering. In the engineering, shellfishes(SF) are used for cleaning excessive algae(AL). For changing the parghway of nutrients transfering,aquatic plants(AP) are cultured and are consumed by the farmed fishes (FS). By catching shellfish and fish , organic matter (OM) and inorganic salts (NP) in the water body can be exported along the pathways of algae(AL) to shellfishes (SF) and aquatic plants(AP) to fishes(FS). By loop analysis,the structure of food chain in ecological engineering can be appropriately regulated so that the ecological engineering holds a certain specific function and materials and energy can beeffectivelly utilized.