エコフィジオロジー エコフィジオロジー. 気候変動は,海洋生息地に対する代謝的制約を厳しくする
Curtis Deutsch1, Aaron Ferrel2, Brad Seibel3
1School of Oceanography, University of Washington, Seattle, WA 98195, USA. cdeutsch@uw.edu.
まとめ
海洋の温暖化と脱酸素化は,海洋生息地を縮小させるだろう. 新しい代謝指数は,酸素供給の減少と代謝需要の増加により,種の範囲が極性および垂直に収縮すると予測しています.
科学分野:
- マリン・バイオロジーの海洋生物学
- 海洋学 海洋学 海洋学
- 気候変動科学 気候変動科学
背景:
- 海の温暖化と脱酸素化は,海洋生態系に重大な脅威をもたらしています.
- 海洋種の生息地に対する複数のストレス要因の影響を予測するために,メカニズム的枠組みが必要である.
- メタボリック要件を理解することは,種の脆弱性を評価する上で極めて重要です.
研究 の 目的:
- 気候変動が海洋内熱藻の分布に与える影響を予測するために,代謝指数を開発し,適用する.
- 将来の温暖化および脱酸素化シナリオの下で,代謝的に生存可能な生息地における予測される変化を定量化するために.
主な方法:
- 生理学,気候,生物地理学的データを統合して,代謝指数 (O2需要比に対するO2供給比) を校正する.
- いくつかの海洋エクトーサーム種の地理的範囲における代謝指数をマッピングしました.
- 温暖化と脱酸素化のシナリオを組み合わせた場合の代謝指数の変化を予測した.
主要な成果:
- 現代の海洋赤熱虫の分布は,最低代謝指数2~5で制限されています.
- 世界の海洋代謝指数は,今世紀で約20%減少すると予測されています.
- 北部の高緯度地域では,代謝指数が約50%低下すると予測されています.
結論:
- 温暖化と脱酸素化は,代謝的に生存可能な海洋生息地を大幅に減少させるだろう.
- 種の範囲は,極方向と垂直方向に収縮すると予測されています.
- 代謝指数は,海洋生物多様性に対する気候変動の影響を予測するための重要な枠組みを提供します.
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