对热宽度的水力效应会影响高度甲虫的气候脆弱性
Eric A Riddell1, Marko Mutanen2, Cameron K Ghalambor3,4
1Department of Ecology, Evolutionary, and Organismal Biology, Iowa State University, Ames, Iowa, USA.
Global change biology
|June 28, 2023
概括
生物在干燥条件下限制水损失,但这可能会降低它们的热耐受性. 点击甲虫显示较低的临界热最大值与较高的水损失,使气候脆弱性预测复杂化.
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:
- 物种的热耐受性是气候脆弱性评估的关键.
- 水环境对热耐受性的影响还没有得到充分研究.
- 有机体可能会以减少水损失来换取改变的热承受能力.
研究的目的:
- 为了研究降水和湿度如何影响点击甲虫的水损失率和临界热最大值 (CTmax).
- 探索水损失和热耐受性之间的关系.
- 将这些生理反应纳入气候脆弱性模型.
主要方法:
- 实地和实验室实验使点击甲虫暴露在不同的湿度和降水中.
- 测量水损失率和临界热最大值 (CTmax).
- 利用点击甲虫的行为来评估亚临界温度的耐受性.
- 机械化利基建模,整合了叶子和甲虫温度.
主要成果:
- 在干燥适应和降雨后的条件下观察到更高的水损失率.
- 急性湿度治疗没有直接影响CTmax.
- 与预测相反,CTmax与水损失率有负相关性.
- 利基模型显示,气候脆弱性指数对水损失对热耐受性的影响敏感.
结论:
- 水损失生理学显著影响热耐受性和气候脆弱性.
- 水损失和CTmax之间的负相关性强调了需要采用全机体方法的必要性.
- 由于水损失,CTmax在人口水平上的变化使其作为直接气候脆弱性代理的使用变得复杂.
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