Multiscale Evaluation of Thermal Dependence in the Glucocorticoid Response of Vertebrates
Multiscale Evaluation of Thermal Dependence in the Glucocorticoid Response of Vertebrates
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DOI：
10.1086/687588
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发表时间：
2016-09-01
影响因子：
2.9
通讯作者：
Moore, Ignacio T.
中科院分区：
文献类型：
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作者：
Jessop, Tim S.;Lane, Meagan L.;Moore, Ignacio T.
环境温度对动物的生理、生态和进化有着深远的影响。糖皮质激素通过对表型表现和生活史的影响为脊椎动物提供对环境变化的基本生理适应，但我们对温度如何影响脊椎动物的糖皮质激素调节缺乏全面的了解。通过实地研究以及元系统发育分析和比较系统发育分析，我们研究了温度的剧烈变化和大范围变化与基线和应激诱导的GC水平之间的关系。糖皮质激素水平被发现依赖于温度和分类群，但一般而言，脊椎动物与温度的急剧变化表现出强烈的正相关。此外，爬行动物基线、鸟类基线和捕获应激诱导的GC水平在一定程度上与大范围环境温度存在相关性。因此，脊椎动物的GC功能似乎明显受到热影响。然而，我们警告说，缺乏关于热塑性、遗传性的详细知识，以及GC响应中强烈的系统发育信号的基础，限制了我们目前对GC激素在物种对当前和未来气候变化的响应中的作用的了解。
Environmental temperature has profound effects on animal physiology, ecology, and evolution. Glucocorticoid (GC) hormones, through effects on phenotypic performance and life history, provide fundamental vertebrate physiological adaptations to environmental variation, yet we lack a comprehensive understanding of how temperature influences GC regulation in vertebrates. Using field studies and meta-and comparative phylogenetic analyses, we investigated how acute change and broadscale variation in temperature correlated with baseline and stress-induced GC levels. Glucocorticoid levels were found to be temperature and taxon dependent, but generally, vertebrates exhibited strong positive correlations with acute changes in temperature. Furthermore, reptile baseline, bird baseline, and capture stress-induced GC levels to some extent covaried with broadscale environmental temperature. Thus, vertebrate GC function appears clearly thermally influenced. However, we caution that lack of detailed knowledge of thermal plasticity, heritability, and the basis for strong phylogenetic signal in GC responses limits our current understanding of the role of GC hormones in species' responses to current and future climate variation.