大阪湾沿岸の人工緑地におけるトビムシ類の群集構造の決定要因について

概要

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This study examined that the relationship between collembolan community structure and habitat in artificial "green lungs". We investigated collembolan communities at 16 stations (2 bare ground, 5 grassland, 4 coniferous woodland, 5 evergreen woodland) along Osaka Bay from October to November 1995. The collembola we collected consisted of 6 families, 23 genera, 30 species, and 5745 individuals. Four pioneer species were abundant : Hypogastrura communis (FOLSOM) from 14 stations, Onychiurus uenoi YOSII from 13 stations, Homidia sauteri (BORNER) from 10 stations, and Proisotoma subminuta (DENIS) from 9 stations. The number of species and species diversity (H') showed significant positive correlation with the vegetation prosperity and the thickness of the litter layer. The number of Collembola showed no significant correlation with any environmental elements examined (including pH, electric conductivity, and water content). The proportions of pioneer species in each community decreased exponentially with increasing thickness of litter. Thickness of litter was the most important factor in determining the species composition of collembolan communities. The removal of weeds, fallen leaves, and twigs prevents the formation of a thick litter layer and influences collembolan communities.
日本生態学会の論文
2000-12-25