武汉市南湖大型底栖动物的群落结构

在分析企业环境行为类型及决策机制的基础上，认为内外环境因素的综合作用促成了企业环境行 为的发生．据此，通过相关性和主成分分析对太湖流域印染企业环境行为影响因素进行选择，并构建了环 境行为决策数量模型，结果表明：私营合资企业环保投入水平高于国有集体企业；中型企业环保投入高于小 型企业，此外，企业环境行为演变也受政府和经济环境制约．最后提出了优化企业环境行为的对策，即加快 企业改制，强化用地供应管理，改革排污费制度以及规划产业布局．

Community Structure of Macrozoobenthos in Lake Nanhu, Wuhan, China

Based on the characteristics and mechamsm of environment behawor for enterprises,the authors find that the inside and outside surroundings factor determine enwronment behawor for enterprises.By correlation and principal components analysis,this article selects the driving factors of printing and dyeing enterprises in Taihu Basin,and sets up analysis model of environmental be- havior for enterprises.In conclusion,the pollution-control investment of private and joint venture enterprises is higher than national and collectivity enterprises,and the medium-scale enterprises higher than the small scale ones.On the other hand,government and economic factors also restrict the environmental behavior for enterprises.As a result,this article puts forward the countermeasures for controlling pollution of Taihu Basin,that is to quicken enterprise reorganization,adjusting industrial land use structure,refor- ming the charge system of pollution discharge,and developing sustainable economy.