西天目山植被和昆虫群落间生态关系的数量分析

A PRIMARY STUDY OF ECOLOGICAL RELATION BETWEEN VEGETATION AND INSECT COMMUNITY IN THE WESTERN TIANMU MOUNTAIN ZHEJIANG PROVINCE,CHINA

The data of seven stands, each set on every elevation of 200 m in the westernTianmu mountain, were investigated. Both the species of individual vegetationalstratum and insect communities were analysed with numerical taxonomic methods-clustering and ordination. Three coefficients, i.e. the Euclidean distance, Bray-Curtis distance and the product moment correlation, have been calculated, andthen clustered with unweighted pair group arithemetic average linkage clusteringmethod. The dendrograms of tree, shrub and herb strata are similar to each other. TheEuclidean distance coefficient of tree stratum and insect communities, Bray-Curtisdistance coefficient for shrub and herb strata are more satisfying. Tree, shrub,herb strata and insect communities are all closely connected and dependent uponeach other, but even more evident between the tree and herbs strata and the insectcommunities are closer than that between shrub stratum and insect communities.The temperature inverse distribution at 800 m altitude strongly effected the distri-bution of insect communities. From the loading of various attributes in the princi-pal component analysis, the dominant species of plant and insect communities weredetermined, thereby the ecological relation between the tree, shrubs, and the herbstrata of different vegetation types and insect communities can be describedsimpely.