Abstract:

Soil-animal was investigated in Larix principis-rupprechtii forest in Guandi Mountain of Shanxi Province, from June to October, 2005.33 388 individuals were collected,which belonged to 3 phyla, 7 classes,21 orders and 57 genera. The dominant genera were Arcarina, Collembola. The common genera were Coloptera, Lepidoptera,Diptera(L), Geophiomorpha, Oligchaeta and so on .The research and comparison of 10 plots showed that the numbers of groups and individuals in natural forest were greater,and the diversity was higher than in parallelism planted forest; the diversity was declining with the altitude increasing. The ratio of individual of groups in withered and fallen layer was increasing with altitude increasing, but the results in another layer were opposite,and the vertical distribution of soil animals showed that obvious surface assembly phenomenon. The numbers of groups and individual in Aug. were greater than that in another,and the diversity in Aug was the highest.

Key words: soil animals, dynamics, diversity, Guandi Mountain, Larix principis-rupprechtii