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长期暴露在环境温度下会减弱鱼类的热敏度
Alexia M González-Ferreras1,2, Jose Barquín3, Penelope S A Blyth4,5
1IHCantabria - Instituto de Hidráulica Ambiental de la Universidad de Cantabria, C/Isabel Torres 15, 39011, Santander, Spain. gferrerasam@unican.es.
Nature communications
|December 14, 2023
概括
生物可以调整其新陈代谢以适应慢性变暖,而这种过程在急性研究中被忽视. 这种热适应对于准确预测物种在气候变化中的生存至关重要.
科学领域:
- 生态生态学 生态生态学
- 生理学 生理学 生理学
- 气候变化生物学 气候变化生物学
背景情况:
- 代谢,能量和材料的加工,通常与温度和身体大小相适应.
- 对急性温度暴露的研究往往忽视了生物体适应慢性变暖的能力.
- 了解热适应对于生态预测至关重要.
研究的目的:
- 研究慢性和急性热暴露对鱼类新陈代谢的不同影响.
- 为了确定慢性变暖是否会减弱鱼类新陈代谢的热敏度.
- 改进生物能源模型,以预测物种对气候变化的反应.
主要方法:
- 在现场呼吸计测试对鱼类鱼进行了实验.
- 进行了移植实验,以使鱼类长期暴露在不同的溪流温度下.
- 生物能源模型被用于模拟不同热条件下的鱼类存在.
主要成果:
- 在移植的鱼类中观察到代谢的显著温度依赖,但在现场急性暴露的鱼类中没有.
- 长期暴露于变暖被发现减弱了鱼类新陈代谢的热敏感性.
- 结合长期暴露的生物能量模型准确地预测了鱼类在温暖的溪流中的存在.
结论:
- 类鱼表现出热适应,缓和它们对慢性变暖的代谢反应.
- 预测全球变暖对生态的影响需要考虑热适应和适应.
- 当前的模型可能会高估灭绝风险,如果他们只考虑急性热反应.
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