気候 変化 は 北極 の 冬眠 状態 の 生物 学 と 現象 学 を 変化 さ せ て い ます
Helen E Chmura1,2, Cassandra Duncan3, Grace Burrell3
1Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA.
Science (New York, N.Y.)
|May 25, 2023
まとめ
北極の温暖化は,永久凍土の凍結解凍サイクルを変化させ,北極地殻リス (Urocitellus parryii) の冬眠に影響を与えています. 気候による変化はリスの生理と冬眠のタイミングに影響し 生態系全体に影響を及ぼします
科学分野:
- 北極の生態系
- 気候変動の生物学
- 哺乳類生理学
背景:
- 北極地域は急速な温暖化を経験していますが 生物生理学的過程と環境変化を結びつける長期的なデータは稀です
- これらの影響を理解することは,このデータ不足の環境における生態系の反応を予測するのに不可欠です.
研究 の 目的:
- アラスカの北極の永久凍土の動態と北極地殻リスの生理学に 気候変動の長期的な影響を調査する.
- 土壌の凍結と解凍のサイクルとUrocitellus parryiiの冬眠エネルギーの関係を分析する.
主な方法:
- アラスカの北極で 25年にわたる研究で 永久凍土の土壌の凍結と解凍のサイクルを観察しました
- 冬眠中の北極地殻リス (Urocitellus parryii) の生理学的反応の観察と分析
- 冬眠の開始と終了のタイミングの変化を環境条件に照らして量化する.
主要な成果:
- 土壌の凍結と解凍のサイクルが遅れていることが観測され,気候変動の傾向と直接関連しています.
- 北極の地殻リスは 凍り付くのを防ぐために 熱の生成を遅らせた.
- 冬眠の終焉は10年ごとに4日進んだが,雄は進まない.
結論:
- 気候の温暖化により 永久凍土の現象や 北極地殻リスの冬眠の生理が大きく変化します
- 冬眠のエネルギーとタイミングの現象的変化は,リスの個体数と獲物の利用可能性にリスクをもたらします.
- 温暖化が続くと 種内相互作用や 広い北極の食物網に 障害が生じることがあります
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