随着全球变暖而导致热失效率的极端升级
Lisa Bjerregaard Jørgensen1, Michael Ørsted1, Hans Malte1
1Section for Zoophysiology, Department of Biology, Aarhus University, Aarhus, Denmark.
Nature
|October 26, 2022
概括
全球变暖对热植物构成严重威胁. 即使是适度的温度上升也会显著加快热失效率,导致死亡率增加,并可能低估气候变化的影响.
科学领域:
- 生理学
- 生态学
- 气候变化生物学
背景情况:
- 温度极大地影响了体生理和分布.
- 全球气候变化正在改变全球的热环境.
研究的目的:
- 量化外热生物过程的温度敏感性,包括生长,恒温和热失效.
- 预测气候变暖对电热失效率的影响.
主要方法:
- 对多种生态热物种的生物化学过程速度的分析.
- 计算不同生理过程的激活能量 (Ea).
- 在未来的变暖情景下增加热失效率的建模.
主要成果:
- 生物维护过程每摄氏度增加7%.
- 热失效率每摄氏度增加超过100%.
- 到2100年,温和的变暖可能会使热失效率增加774% (陆地) 和180% (水域).
结论:
- 在热失效过程中,Ectotherms表现出极端的热敏感性.
- 预计的热浪和变暖将不成比例地增加热带生物的死亡率.
- 目前的模型可能低估了全球变暖对外热物种的影响.
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