Community Diversity Comparisons of Spiders among Plantation Forests in Yuanmou Dry-hot Valley

Spider diversity was investigated by sweep netting and pitfall trapping in 8 plantations in Yuanmou dry-hot valley,Yunnan.1 703 individuals were captured,including 155 species and 20 families.The species richness(S)was between 25~39,the Margalef index was 4.119~8.216,the Shannon-Wiener index was between 1.868~3.267,the Simpson index was between 0.051~0.271,the Pielou index was between 0.580~0.902,and the Jaccard similarity coefficient as between 0.130~0.317 in those plantations.The diversity of spider communities was different in the plantations with different vegetative component.The diversity was high in the plantations with richly vegetative components and thick shrub-herbage cover.The similarity between the spider communities in the plantations was low,indicating the heterogeneity of the communities.Those plantations can produce rich natural enemies to maintain the sustainable development in the agriculture and should be protected.