<報文>土壌動物群集による横浜市の都市環境の解析 : I. ベイト・トラップに集まる甲虫類

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Faunas of Coleoptera collected by baited pitfall trap were compared between the urban and　the suburban areas of Yokohama City. A total of 3,105 individuals belonging to 32 species and 9 families were collected from 14 stations under various degrees of human impacts. （1）The number of families and species, （2）density of total Coleoptera, （3）the species number of the families Silphidae, Carabidae and Harpalidae decreased jn the urban area, while dominancies of the family Silphidae and Scarabaeidae increased in the area. Analysis of the coleopteran fauna by a method similar to that of phytosociology revealed a close relation between Coleoptera and degree of urbanization. Nicrophorus concolor, Calosipha brunnicollis, Cbrabus procerulus and three other species are restricted to the suburban area, whereas Amara chalcites tends to prefer to the urban area. Margarinothus nipponicus and Eusilpha japonica showed no preference and inhabit in high density all the stations investigated. Similarity of coleopteran faunas based uponJaccard's index was high among the stations in the suburban than in the urban area.
横浜国立大学の論文