From May to October of 2008 by using a sampling method, the soil collembolans communities were investigated at shell island of the Yellow River Delta (YRD) in the north of Wudi, Shandong Province. Totally 7 461 soil collembolans individuals belonged to 17 genus, 7 families and 4 orders were obtained in total samplings, among which Onychiurus and Fo/som/a were dominant groups and their amount reached 79.25% of the total. Hypogastrura, Neanura, Xenylla and Isotoma were the frequent groups and their amount reached 15.91% of the total. And then, the remnant groups were rare groups. The changes of Shannon-Weiner diversity index, Margalef richness index and Pielou evenness index were similar, contrary to that of Simpson dominance index. The monthly dynamics of Shannon Weiner diversity index was August>July>September>October>May>June.%试验对位于山东省无棣县北部的黄河三角洲贝壳堤岛,逐月进行分层(上、中、下3层)取样研究该区跳虫群落结构,共获得各类跳虫标本7461头,隶属于弹尾纲4目7科17属.结果表明,优势类群为棘跳属(Onychiurus)和符跳属(Folsomia)两者之和占总捕获个体数量的79.25％;常见类群为球角跳属(Hypogastrura),疣跳属(Neanura),奇跳属(Xenylla)和等节跳属(Isotoma),占总捕获个体数量的15.91％；其他11个属为稀有类群,仅占总捕获个体数量的4.84％.跳虫群落的Margalef丰富度指数、Shannon-Weiner多样性指数和Pielou均匀度指数的变化规律一致,Simpson优势度指数与Pielou均匀度指数的变化规律相反.Shannon-Weiner多样性指数(H)的月份动态为8月＞7月＞9月＞10月＞5月＞6月.
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