Vertical Microdistribution of the Drosophilidae (Diptera) within Various Forests in Hokkaido : II. Streamside in Natural Broad-Leaved Forests

概要

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In order to help clarify the spacial aspect of ecological structure of drosophilid assemblage in the vicinity of the stream, vertical microdistribution was surveyed from the stream surface up to the canopy of the streamside forest. Basically, streamside drosophilid assemblage was found to be composed of two associations : I) streamside forest association and II) streamside association. However, the streamside forest association was further divided into two subassociations : α) forest canopy subassociation and β) forest floor subassociation. It was discovered that the components of the streamside forest association are, in general, not so different from the ones of the natural broad-leaved forest, but the overlaps of the habitats of each species in the streamside forest are more conspicuous than those seen in the natural broad-leaved forest. This is probably due to the obscurity of the vegetational stratification in the streamside forest. The streamside association, however, was clearly distinct from both the streamside forest association and those of the natural broad-leaved forest. This strongly implies that species belonging to this association have unique ecological characteristics which enable them to adapt well to high humidity and low temperature.
日本昆虫学会の論文
1980-12-25