COMMUNITY STRUCTURE OF INSECTS AND SPIDERS IN DIFFERENT TYPES OF TEA PLANTATION
不同类型茶园昆虫、蜘蛛群落结构分析

The community structures of insects and spiders in different kinds of ecological environment and control level of tea plantation were investigated using principal component analysis(PCA),system cluster analysis and Fuzzy cluster analysis.The results show that the number of species,community diversity index and community evenness index reduced from tea plantation of chemical control,via tea plantation of integrated control and tea plantation of ecological management,tea plantation of simple environment,tea plantation of complicated environment;young growth tea plantation,to old growth tea plantation.Therefore,the low stability of community was principally caused by chemical control and oversimplification of ecological environment.