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对广州天河城市化地区林地、草地和农田3种土地利用方式下,6个代表性的样地中小型土壤动物群落进行了调查,共捕获中小型土壤动物1623个,共26个类群,其中线虫纲(Nematoda)、蜱螨目(Acarina)和弹尾目(Collembola)为优势类群,共占总捕获量的79.1%。不同样地生境中土壤动物的类群组成以及个体数不同。总体来看,林地、农田、草地土壤动物群落的Shannon多样性指数、复杂性指数均依次降低,Pielou均匀性指数、Mar-galef丰富度指数均以林地为最高。对土壤动物的聚类和排序结果表明,研究区中小型土壤动物可划分为4大类,其中第1类由3种优势类群组成;第一、二排序轴分别反映了土壤理化性质、土地利用类型(以人类干扰程度不同为主要特征)对土壤动物组成及分布的影响。
A total of 1623 small and medium-sized soil fauna were collected from 26 representative small and medium soil animal communities under 3 land use types of forest land, grassland and farmland in the urbanization area of Tianhe, Guangzhou. Among them, nematodes Nematoda, Acarina and Collembola were the dominant groups, accounting for 79.1% of the total catch. In different habitats, soil fauna has different taxonomic groups and individuals. Overall, Shannon’s diversity index and complexity index of soil animal community in forestland, farmland and grassland all decreased in turn, while Pielou evenness index and Mar-galef abundance index were the highest in woodland. The results of clustering and sequencing of soil fauna show that the soil fauna can be divided into four groups, of which the first group consists of three dominant groups. The first and second ordination axes respectively reflect the soil physical and chemical properties, land use Type (with different degree of human disturbance as the main feature) on soil animal composition and distribution.