太白山不同林带叶蝉多样性

针对太白山4个不同林带的叶蝉进行了物种组成、多样性和丰富度的研究。应用香农-维纳（Shannon-Weaver）多样性指数（H）、辛普森（Simpson）多样性指数（D）和物种均匀度指数（J）对太白山不同林带叶蝉多样性和物种均匀度进行了分析。运用Jaccard指数计算了不同林带叶蝉组成的相似性，并利用SPSS进行了聚类分析。结果表明，随着海拔高度和林带的变化，叶蝉的分布受到很大影响。在低海拔地带，叶蝉种类、种群数量、生物多样性指数和丰富度指数较高，相反则偏低。太白山南坡的叶蝉丰富度和多样性指数高于同海拔北坡相应林带。在高海拔地带，同坡向连续的林带叶蝉种类组成相似性较高；但在低海拔地带，同一林带的不同坡向上叶蝉种类组成相似性最大。太白山叶蝉以广布种比例最大，东洋种与古北种比例相近。

Leafhopper (Hemiptera,Cicadellidae) Community Composition and Diversity in Different Forest Zones of Taibai Mountains

A study was conducted to describe the major species composition,diversity and abundance of leafhoppers in four different forest zones of Taibai Mountains.Species diversity and evenness were analyzed using Shannon-Weaver index (H),Simpson’s diversity index (D),and Jaccard index (J),respectively.The similarity of species composition of different forest zones was calculated using Jaccard index,and a clustering analysis was conducted using SPSS.The results showed that significant differences in leafhopper distribution existed in different habitats among different altitudes.In forest zones of low altitude,the species diversity,population and abundance were higher than those in higher altitudes.Leafhopper species abundance and biodiversity on the south slope were higher than that of the north slope at the same altitude.In zones of high altitude,the species composition of the successive habitats on the same slope were much similar to each other.But in zones of low altitude,the species composition of deciduous broadleaf forest zones of the south and north slopes exhibited significant similarity.Widely-distributed species of leafhoppers which distributed in Taibai Mountains had the largest proportion.The proportions of the Palearctic species and Oriental species were similar.