峰值特征性能温度的变化限制了关节动物种群适应气候变暖的适应
Samraat Pawar1, Paul J Huxley2,3, Thomas R C Smallwood4
1Department of Life Sciences, Imperial College London, Ascot, UK. s.pawar@imperial.ac.uk.
Nature ecology & evolution
|January 25, 2024
概括
关节动物种群在适应变暖时面临限制. 它们的热适应率受到关键生命历史特征的限制,影响它们应对气候变化的能力.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 气候变化生物学 气候变化生物学
背景情况:
- 关节动物种群适应长期气候变暖的能力仍然不确定.
- 了解这些适应性极限对于预测生态对气候变化的反应至关重要.
研究的目的:
- 研究关节动物群体热适应率的约束因素.
- 确定限制热适应性的关键生命史特征,并探索特征特异性热性能曲线的作用.
主要方法:
- 结合理论建模与61种不同的节肢动物物种的新全球数据集.
- 分析了四个关键生命史特征的最佳温度变化:青少年发育,成人生育能力,青少年死亡率和成人死亡率.
- 研究了能量分配和生命史权衡对热适应的影响.
主要成果:
- 热适应的速度基本上受到关键生命史特征的最佳温度的限制,以以下顺序:青少年发育,成人生育能力,青少年死亡率和成人死亡率.
- 这些特征的峰值性能温度的差异会对适应产生方向性约束,由于能量和生命历史的权衡,这种约束仍然存在.
- 来自61种节肢动物的实证数据强烈支持这些理论预测,显示当代种群在这些约束下演变.
结论:
- 关节动物对气候变暖的热适应受到特定生命历史特征和它们不同的热最佳条件的限制.
- 可行的特征测量可以预测关节动物适应温度梯度和气候变化的适应能力.
- 这项研究为评估各种节肢动物种群对全球变暖的脆弱性提供了一个框架.
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