大雪山高山帯の流水性水生昆虫

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タイトル別名
  • Lotic aquatic insects in the alpine zone of Daisetsuzan National Park, Hokkaido
  • ダイセツザン コウザンタイ ノ リュウスイセイ スイセイ コンチュウ

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We investigated the aquatic insect fauna of two streams in the Daisetsuzan National Park; the Hokkaizawa Stream (144°60.33'E, 41°5.48'N, 1, 840ma.s.l.) and the Akaishi Stream (144°65.58'E, 41°20.54'N, 1, 830ma.s.1). Of the 10 taxa were collected in the Hokkaizawa Stream, Apatania sp. (Trichoptera) were dominant. In the Akaishi Stream, among 3 taxa collected, Nemoura spp. (Plecoptera) were dominant. There were no taxa common to the two streams. The Akaishi Stream has a mean pH of 3.1. This acidic pH accounts for the different species composition of aquatic entomofauna in the two streams.

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