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Title: 融雪期の雪中における無脊椎動物の生息状況
Other Titles: Distribution and activity of intranivean invertebrates in snowmelt season in Aomori Prefecture, northern Japan
Authors: 大高, 明史1 Browse this author
Authors(alt): Ohtaka, Akifumi1
Keywords: 融雪期
snowmelt season
Akashibo red snow
granular snow
interstitial fauna
Issue Date: 31-Mar-2012
Publisher: 北海道大学低温科学研究所
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 70
Start Page: 113
End Page: 117
Abstract: 赤雪発生の調査を東北地方の47地点について行った. 原因の多くは尾瀬において見られるアカシボ現象と同様に, 多量の酸化鉄を含む粒子であった. 発生地域は融雪時期に積雪下層部と湿原もしくは土壌との境界面に融雪水の流れのある地点あるいは融雪水のとどまる地点であった. 赤雪消滅後の土壌には多量のSiと次いでFeおよび少量のAl, Mgなどが存在した.
Vertical distribution and activities of intranivean invertebrates were studied in snowmelt season in northern Japan. The intranivean invertebrates were dominated by copepods, dipteran larvae and oligochaetes,and they increased toward the bottom. High structural similarity between snow and soil animals strongly suggested that the intranivean invertebrates were derived from subnivean fauna. All the harpacticoids recovered from the less wet snow in the middle layers were died often with seriously damaged in their appendages. On the other hand, most of those in the lower and waterbearing layers of the snow showed active movement. Many precopulating pairs were found in the harpacticoids there. It is suggested that inundated granular snow in the late snowmelt season can provide interstices which harbor many small aquatic animals such as copepods and oligochaetes.
Type: bulletin (article)
Appears in Collections:低温科学 = Low Temperature Science > 第70巻

Submitter: 低温科学研究所図書室

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