MYRMECOFAUNAL CHANGES SINCE THE 1977-78 ERUPTIONS ON MT. USU : Entomological and Ecological Surveys on Mt. Usu in 1984. II.

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  • HIGASHI Seigo
    Graduate School of Environmental Science, Hokkaido University
  • SATO Hiroaki
    Graduate School of Environmental Science, Hokkaido University
  • SUGAWARA Hiromi
    Graduate School of Environmental Science, Hokkaido University
  • FUKUDA Hiromi
    Graduate School of Environmental Science, Hokkaido University

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Other Title
  • 1977-78年有珠山噴火後のアリ相変遷
  • 1977-78年有珠山噴火後のアリ相変遷〔英文〕
  • 1977 78ネン ウスザン フンカゴ ノ アリソウ ヘンセン エイブン

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Abstract

In 1984 a survey of ants was conducted around Mt. Usu, the top area of which had been deforested by eruptions in 1977 and 1978. The mountaintop area was still deforested but already inhabited by 13 species, most of which were dominant, common or subterranean on the foot of the mountain. Based on ITO and SHIMIZU (1980), who presumed the vegetational state before the eruptions, SAKAGAMI et al. (1980), who surveyed the myrmecofauna in 1977-78,and the results of the present census, the original myrmecofauna inhabiting the mountaintop area before the eruptions was estimated to be 22 species.

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