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最近の気候温暖化による世界的な代謝影響
Michael E Dillon1, George Wang, Raymond B Huey
1Department of Zoology and Physiology, University of Wyoming, Laramie, Wyoming 82071, USA. Michael.Dillon@uwyo.edu
Nature
|October 9, 2010
まとめ
地球温暖化が熱帯の熱帯生物に大きく影響している. より小さな温度上昇にもかかわらず,それらの代謝率は非線形的な温度効果のために実質的に変化し,生物多様性を脅かします.
科学分野:
- エコロジー エコロジー エコロジー
- 生理学 生理学とは
- 気候変動 生物学 生物学
背景:
- 地球温暖化は,主に中高緯度から高緯度で観察される,文書化された生物学的シフトを引き起こす.
- 熱帯地域では,温暖化が遅いため,生物学的影響があまり顕著ではないことが予想されます.
- 生理学的反応,特にエクトーサーマの代謝率は,温度変化に敏感である.
研究 の 目的:
- 地球温暖化が地球上の地上の代謝率に及ぼす影響を定量化するために.
- 熱帯地域と温帯地域,北極地域における代謝率の変化の大きさを比較する.
- 熱帯生物多様性に対する温暖化の深刻な影響を評価する.
主な方法:
- 異なる緯度帯における陸上のエクトーサームの代謝率の変化の分析.
- 温度と代謝率の非線形関係をモデル化する.
- 気候変動が代謝活動に及ぼす影響を世界規模で定量化する.
主要な成果:
- 熱帯地域における陸生生物の代謝率の推定変化は相当なものである.
- 熱帯の代謝率の変化は,北温帯のそれと同等であり,北極圏よりも大きい.
- これらの大きな変化は,熱帯の比較的小さな温度変化にもかかわらず起こります.
結論:
- 代謝に対する非線形的な温度効果は,熱帯では不釣り合いの大きな影響を及ぼします.
- 世界の生物多様性の主要な構成要素である熱帯の熱帯生物は,気候変動による深刻な脅威に直面しています.
- 熱帯気候変化への適応戦略では,生理学的影響を緊急に考慮する必要があります.
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