在CTmax中具有更大的可塑性,在尾巴青种群中增加了气候变化
Amanda S Cicchino1,2, Cameron K Ghalambor1,2,3, Brenna R Forester2
1Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523, USA.
Proceedings. Biological sciences
|November 5, 2024
概括
气候变化推动了物种热耐受性的演变. 在变化的气候条件下,沿海尾巴青在临界热极值时表现出更大的可塑性,支持气候变化假说.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 身体生理学 身体生理学
背景情况:
- 气候变化假设 (CVH) 预测,波动的气候驱动了更广泛的热性能范围的演变.
- 博格特效应表明空间热变性允许行为温度调节,可能抵消CVH.
- 以前的研究表明,物种内部对CVH的支持是混合的,可能是由于空间异质性.
研究的目的:
- 通过检查临界热最大值 (CTmax) 的可塑性,对沿海尾巴青 (Ascaphus truei) 进行CVH测试.
- 调查时间和空间热变化的影响热生理特征.
- 通过在空间均的环境中研究种群来最大限度地减少行为温度调节的混效应.
主要方法:
- 在沿海尾巴青种群中评估CTmax的可塑性.
- 在不同程度的空间热均性环境中的目标人群.
- 与局部时间热变化相关的CTmax可塑性进行比较.
主要成果:
- 经历较高时间热变量的群体表现出更大的CTmax可塑性,支持CVH.
- 一个具有空间温度变化的单个位置显示出高于预期的可塑性,这表明行为温度调节可以减少CVH支持.
- CTmax中的可塑性与空间均景观中的时间气候变化有关.
结论:
- 时间气候变化是塑造热可塑性的重要因素.
- 由空间热变性促进的行为温度调节可以调节进化对气候变化的反应.
- 这项研究为空间均热景观中的CVH提供了洞察力.
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