西双版纳热带森林雨季土壤动物群落组成与分布特征

１９９７年雨季，对西双版纳不同类型热带森林干生土壤动物群落的组成与分布特征的研究表明：蜱满目是４类森林土壤动物群落中的主要优势类群，弹尾目，膜翅目和等翅目主次优势类群，土各落类群组成及数量分布变化以２类正处于向顶极群落演替的次生林为最大，而在顶极群落季节雨林中，变化则明显减小，说明土壤土壤的多寡与森林小循环速度密切相关，土壤动物在土壤层中的垂直分布主表层多于底层，但有逆向分布现象。

The Character of Composition and Distribution on Soil Fauna under Tropical Forests of Xishuangbanna in Rainy Season

The composition of groups and the distribution of individuals of soil fauna under different tropical forests in Xishuangbanna were studied in rainy season in 1998. The results showed: Acarina is the most dominant groups in tropical forest, Collembola, Hymenoptera and Isoptera were the second dominant groups. The change of groups composition and density for soil fauna under secondary forests was the largest, while it decreased in climax community (Seasonal rainforest). The abundance and lack of soil fauna were positively related to the litterfall and the biological cycling speed of tropical forest. The character of vertical distribution is that the individuals and groups of soil fauna on the ground are more than those in the soil, but there are obsequent distribution.