Study on community diversity of soil insect belonging to Coleoptera and Collembola,in Sanjiangyuan nature reservation region

Soil animals are one of important parts in the ecological system. The results showed that Coleoptera and Collembola were the main soil animal flora in four ecosystem in Sanjiangyuan nature reservation region. Their diversity in descened orders were wetland ecosystem, forest ecosystem, alpine meadow ecosystem, and desert ecosystem. The number of individuals and species were both decreased gradually with the depth of soil increased. The community diversity of soil animals in Sanjiangyuan is lower than other places in China. The diversity index (H) is closely correlated with the richness of the vegetation communities. The soil nutrition component is the most important ecological factor that effected soil animal community diversity in Sanjiangyuan nature reservation region.