森林-草原交错带土壤节肢动物群落多样性

在河北北部的塞罕坝森林草原交错区进行了土壤节肢动物群落组成与多样性调查,共获得土壤节肢动物25类,10420头,分属于6纲24目.交错区地带土壤节肢动物群落优势类群为弹尾目和蜱螨目,常见类群有8类,稀有类群15类.群落的多样性分析表明,森林带的多样性指数(H′)、密度-类群指数(DG)和均匀度指数较大,而草甸草原带各种指数较小.pH值与土壤节肢动物的类群数关联度较大,而温度和含水量与土壤节肢动物的个体数关联度较大.

Community diversity of soil arthropods in forest-steppe ecotone

An investigation on the community diversity of soil arthropods in the forest-steppe ecotone of north Hebei Province was conducted.A total of 10 420 individuals of soil arthropods were collected,which belonged to 25 groups,6 classes and 24 orders.Acarina and Collembola were the dominant orders,and there were 8 groups of frequent orders and 15 groups of rare orders.The diversity index(H'),DG index,and evenness of soil arthropod community were relatively higher in forest zone,but lower in meadow-steppe zone.Soil pH had a higher degree of interconnection with the numbers of soil arthropod groups,while soil temperature and moisture content had a higher degree of interconnection with the numbers of soil arthropod individuals.