关帝山华北落叶松天然林和人工林土壤动物的群落多样性

2005年6-10月对关帝山华北落叶松天然林和人工林土壤动物进行分层取样、分离,共获动物33 388头,隶属3门7纲21目57类.弹尾目、蜱螨目为优势类群,鳞翅目、鞘翅目、双翅目等为常见类群.通过10块样地调查对比得出:天然林土壤动物类群数、个体数多于人工林,多样性高于相应的人工林;随海拔的升高,土壤动物群落多样性和个体数量具有降低的趋势;随海拔的升高,凋落物层中动物个体数量所占的比率越来越高,其他各层中的比率却在降低,具有明显的表聚现象;8月份的土壤动物类群数、个体数最高,多样性也最高.

Diversity of Soil-Animal Community in the Planted and Natural Larix principis-rupprechtii Forest in Guandi Mountain

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.