茂兰喀斯特森林大型土壤动物群落多样性初探

A Preliminary Study on Diversity of Soil Macrofauna in Maolan Karst Forest

2008年7月至9月,对茂兰喀斯特森林3种植被类型下的大型土壤动物进行研究,共获5 728只,隶属3门7纲23类.选用类群数、个体数及多样性、均匀性、优势度指标来分析土壤动物群落结构.结果表明:茂兰喀斯特森林生态系统中,优势类群为膜翅目(蚁科)和蜘蛛目2类,稀有类群为原尾目、石蛃目、等翅目、同翅目、半翅目、双翅目(包含幼虫)、缨翅目、综合纲8类;两个优势类群的个体数占总捕获量的50.93%,3种植被类型的优势度:乔木林大于乔灌混交林大于草坡;均匀性指数差异不大;群落相似性系数差异较小.

From July to September, 2008,the soil macrofauna communities under three vegetation types in Maolan karst forest were studied. A total of 5728 individuals were collected, belonging to 3 phyla, 7 classes and 23 orders. The community structure of the soil macrofauna was analyzed with the indicators of community number, individual number and diversity, homogeneity and dominance. Hymenoptera and Arachnida were shown to be the 2 Predominant groups in the ecosyslern system of Maolan karst forest. Rare taxa included Protura, Microcoryphia, Isoptera, Homoptera, Hemiptera, Diptera, Thysanoptera and Symphyla. Dominance of the e three vegetation types appeared in the order of tree forest 〉parang 〉 grassland. No significant differences were observed in uniformity index and community similarity coefficient among the three vegetations types.