Lotic aquatic insects in the alpine zone of Daisetsuzan National Park, Hokkaido [Japan]

• Published in: Japanese Journal of Limnology (Rikusuigaku Zasshi) Vol. 64; no. 2; pp. 141 - 144
• Main Authors: Konno, Y. (Tohoku Univ., Sendai (Japan)), Nishimoto, H, Maruyama, H, Torii, T, Ishiwata, S
• Format: Journal Article
• Language: Japanese
• Published: Osaka The Japanese Society of Limnology 2003; Japanese Society of Limnology
• Subjects: Acid stream; Alpine zone; Apatania; AQUATIC INSECTS; Daisetsuzan National Park; FAUNA; Freshwater; HIGHLANDS; Insecta; JAPAN; Lotic aquatic insects; NATIONAL PARKS; Nemoura; pH; RIVERS; Japan, Hokkaido, Hokkaido Prefecture, Akaishi Stream; Japan, Hokkaido, Hokkaido Prefecture, Daisetsuzan, Hokkaizawa; Japan
• ISSN: 0021-5104; 1882-4897
• DOI: 10.3739/rikusui.64.141

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.