尽管在广泛的空中昆虫捕食者中对温度的反应相似,但气候影响不同
C C Taff1, J R Shipley2, D R Ardia3
1Department of Ecology & Evolutionary Biology and Lab of Ornithology, Cornell University, Ithaca, NY, USA.
bioRxiv : the preprint server for biology
|December 25, 2025
概括
气候变化影响了动物的繁殖时间. 虽然树群体表现出类似的温度敏感性,但北方群体面临时间限制,导致更大的气候变化脆弱性和人口减少.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 动物行为 动物行为
背景情况:
- 气候变化正在全球范围内改变动物育种现象学.
- 了解特定人口对变暖的反应对于保护至关重要.
- 之前的研究还没有完全将温度灵敏度与响应约束脱而出.
研究的目的:
- 调查为什么有些动物群体适应气候变化,而另一些则不适应气候变化.
- 确定繁殖时间脆弱性的差异是否是由于温度敏感性或响应约束.
- 为了确定哪些树种群最容易受到气候变化的风险.
主要方法:
- 分析了来自123个树 (Tachycineta bicolor) 种群的1,555个种群年数据.
- 对不同度的繁殖进步率进行比较,以应对局部温度变化.
- 评估与变暖有关的选择压力和人口丰度趋势.
主要成果:
- 树种群对局部温度具有相似的敏感性,每升温1摄氏度,繁殖时间大约提前1天.
- 北方人口经历了更严格的季节性时间限制和更大的暴露于最近的变暖.
- 尽管繁殖日期越来越晚,但北方种群在早期繁殖时面临更强烈的选择,并且表现出最显著的繁殖数量下降.
结论:
- 人口对气候变化的脆弱性受到温度敏感性和在环境约束范围内有效应对能力的影响.
- 时间限制,而不是不同的灵敏度,解释了为什么北方树人口更容易受到气候变化的影响.
- 这些发现揭示了气候变化对物种范围的影响不均的一般机制,即使有统一的生理反应.
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