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尾瀬ヶ原のアカシボ雪に出現する貧毛類 (環形動物門環帯綱)の生態学的特徴

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Title: 尾瀬ヶ原のアカシボ雪に出現する貧毛類 (環形動物門環帯綱)の生態学的特徴
Other Titles: Ecological characteristics in oligochaetes (Annelida, Citellata) found in red snow “Akashibo” at Ozehagara mire, central Japan
Authors: 大高, 明史1 Browse this author
Authors(alt): Ohtaka, Akifumi1
Keywords: 尾瀬
Ozegahara mire
“Akashibo” red snow
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: 87
End Page: 92
Abstract: 尾瀬ヶ原のアカシボ雪中に貧毛類が豊富に出現する理由を探るために, 貧毛類の生物学的特性を湿原や雪の環境特性と対比させて議論した. 無雪期の尾瀬ヶ原湿原で見られる貧毛類群集は, ヒメミミズ科やミズミミズ科を主体とした比較的少数の種類からなり, 半水生種や無性繁殖が可能な種類が多くを占める. 貧毛類は本来, 低温環境を好む傾向があり, 尾瀬ヶ原湿原に生息している貧毛類の多くは, 本来の生理生態学的性質でアカシボ雪の環境に対応できているものと考えられる. アカシボの後半に, 小型で細長い間隙性の貧毛類が水分含量の高い雪下部で豊富に出現したのは, この時期の雪が, 海浜や河川で見られる砂礫間隙に匹敵する環境になったためと解釈される.
To elucidate the reason for abundant occurrence of oligochaetes (Annelida, Citellata) in the red snow“Akashibo”at Ozegahara mire, central Japan, ecological and reproductive features of oligochaetes are briefly reviewed, and the faunal characteristics in oligochaetes in Sphagnum mires and snows were discussed from the viewpoints of habitat preference of oligochaetes. Along with Sphagnum mire itself, the snow on the mire is a kind of ecotone in which content of liquid water varies drastically and enable to harbor both terrestrial and aquatic forms. The Akashibo snow found in the snowmelt season consisted of granular ice particles and saturated water, providing interstitial habitats for small aquatic animals. The water bearing Akashibo snows harbored many enchytraeid and naidid oligochaetes which are primarily aquatic and small enough to move in the wet snow.
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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