Spatial and seasonal variation in thermal sensitivity within North American bird species
Spatial and seasonal variation in thermal sensitivity within North American bird species
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DOI：
10.1098/rspb.2023.1398
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发表时间：
2023-04
期刊：
影响因子：
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通讯作者：
Jeremy M. Cohen;D. Fink;B. Zuckerberg
中科院分区：
文献类型：
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作者：
Jeremy M. Cohen;D. Fink;B. Zuckerberg
野生动物对气候变化的响应通常是在物种水平上量化的，但生理学证据表明，考虑到对当地和季节环境的适应，种内热敏性（非平稳性）存在显著差异。非平稳性对气候变化脆弱性具有重要影响；例如，在特定地区或季节，对极端天气的敏感性可能会增加。本研究利用eBird的高分辨率观测数据，了解20种鸟类的热敏性的区域和季节变化。在它们的分布范围内，大多数鸟类在热最佳值和热宽度，或温度和峰值温度范围上都表现出空间和季节变化。一些鸟类表现出恒定的热最优或宽度（平稳性），而另一些则根据当地和当前的环境条件而变化（非平稳性）。跨物种，鸟类通常投资于地理或季节适应气候。种内热敏度的变化可能是生物体对气候变化响应的一个重要但被忽视的方面。
Responses of wildlife to climate change are typically quantified at the species level, but physiological evidence suggests significant intraspecific variation in thermal sensitivity (non-stationarity) given adaptation to local and seasonal environments. Non-stationarity carries important implications for climate change vulnerability; for instance, sensitivity to extreme weather may increase in specific regions or seasons. Here, we leverage high-resolution observational data from eBird to understand regional and seasonal variation in thermal sensitivity for 20 bird species. Across their ranges, most birds demonstrated spatial and seasonal variation in both thermal optimum and breadth, or the temperature and range of temperatures of peak occurrence. Some birds demonstrated constant thermal optima or breadths (stationarity) while others varied according to local and current environmental conditions (non-stationarity). Across species, birds typically invested in either geographic or seasonal adaptation to climate. Intraspecific variation in thermal sensitivity is likely an important but neglected aspect of organismal responses to climate change.