塞罕坝华北落叶松人工林土壤节肢动物群落的研究

2006年5~8月对塞罕坝华北落叶松人工林群落土壤节肢动物进行了两次系统调查,共获得土壤节肢动物1560头,隶属6纲22目。其中弹尾目、蜱螨目、膜翅目和啮目为优势类群,蜘蛛目、鞘翅目和双翅目幼虫等为常见类群。通过4块样地对比可得出:天然次生林群落土壤节肢动物类群数、个体数多于落叶松人工林,多样性也高于人工林;落叶松人工林和天然次生林土壤节肢动物剖面分布具有明显的表聚性,并且随着土壤层次的加深,类群数和个体数也随之减少;落叶松人工林和天然次生林群落中的土壤节肢动物群落有比较高的Jaccard相似性系数,表明两类林分在土壤节肢动物类群和个体数量分布上有较大的相似度。

Study on the community of soil arthropod animals in Larix principis-rupprechtii plantetion in Saihanba

Soil animals in Larix principis-rupprechtii plantations and secondary forests,were investigated thoroughly twice from May to August in 2006.1 560 individuals were collected,which belonged to 6 classes,22 orders.The dominant groups were Acarina,Collembola,Hymenoptera,Psocoptera.The common groups were Aranene Coloptera,Lepidoptera,and so on.The research and comparison of 4 plots showed the numbers of groups and individuals in second forest were greater,and the diversity was higher than in Larix principis-rupprechtii plantations.The groups and individual numbers decreased with the increase of soil depth in two forest ecosystems.There were higher Jaccard coefficients between the two studied forests,implying that the group composition of soil animal community was similar to a certain extent in the two forest ecosystems.The results indicated that soil animal community structure had not changed significantly although the soil biodiversity declined slightly when secondary forest was converted.To deeply understand the ecological processes in the Larix principis-rupprechtii plantations,soil ecological processes related to soil animals need to be performed in the future.