银川市爱伊河湿地土壤动物群落特征研究

摘要

The soil animals at seven sample locations on Aiyi river wetland in Yinchuan municipality were investigated and studied, a total of 2 605 individuals of 30 species, belonging to 4 phyla, 11 classes were captured. The collembola and acarina were dominant groups, which accounted for 42.03% and 36.24% of the total catch, the nematodes, spiders, coleoptera, hymenoptera, diptera larvae and lepidoptera larvae were the common groups. The soil fauna functional groups can be divided into the saprophagous, carnivorous and phytophagous,and the overall performance of the quantity relationship a-mong these were the soil animals > saprophagous predatory soil animals > phytophagous soil animals. The vertical distribu-tion of the soil animal quantity and species in each soil layer has obvious surface accumulation. The community diversity index had a closer positive relationship with the species richness index(P<0.05) and a closer negative relationship with Simp-son dominance index (P<0.05). The degree of similarity of the 7 kind of soil animals was from the moderate dissimilar to the medium similarity.%对银川市爱伊河湿地7个样地的土壤动物进行了调查研究，共捕获土壤动物30类2605只，隶属于4门11纲。土壤动物的优势类群为蜱螨目和弹尾目，分别占总捕获量的42.03%和36.24%。常见类群有线虫类、蜘蛛类、鞘翅目、膜翅目、鳞翅目幼虫和双翅目幼虫。土壤动物功能类群可划分为腐食性、捕食性和植食性土壤动物，其数量比例关系整体上表现为腐食性土壤动物＞捕食性土壤动物＞植食性土壤动物。土壤动物数量、种类在土壤各层的垂直分布具有明显的表聚性。群落多样性与丰富度显著相关（<0.05），而与优势度指数显著负相关（<0.05）。7个样地间土壤动物的相似程度由中等不相似到中等相似。