Climate change upends selection on ornamentation in a wild bird
Climate change upends selection on ornamentation in a wild bird
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DOI：
10.1038/s41559-016-0039
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发表时间：
2017-02-01
影响因子：
16.8
通讯作者：
Gustafsson, Lars
中科院分区：
文献类型：
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作者：
Evans, Simon R.;Gustafsson, Lars
第二性征具有很高的遗传性，并暴露于强大的，环境敏感的选择，因此预计将迅速演变，以应对持续的环境变化。我们研究的生态进化动力学的装饰品表达在一个长期的研究人口的领捕蝇草，Ficedula albicollis，其中额头补丁的大小，积极影响男性生殖成功，显着下降超过34年。在研究期间，前额斑块大小的年度健身选择从积极转为消极，这是由于繁殖地点春季温度上升造成的逆转：在寒冷的繁殖季节后，高度兴奋的雄性选择性地受到青睐，但在温暖的繁殖季节后选择。一个“个体动物模型”描述了在研究过程中繁殖雄性的遗传值下降，模拟显示这不太可能仅仅是漂移造成的。因此，这些结果是一致的适应性进化的性选择性状，以应对气候变化。
Secondary sexual traits have high heritabilities and are exposed to strong, environmentally sensitive selection, and so are expected to evolve rapidly in response to sustained environmental change. We examine the eco-evolutionary dynamics of ornament expression in a long-term study population of collared flycatchers, Ficedula albicollis, in which forehead patch size, which positively influences male reproductive success, declined markedly over 34 years. Annual fitness selection on forehead patch size switched from positive to negative during the study, a reversal that is accounted for by rising spring temperatures at the breeding site: highly ornamented males were selectively favoured following cold breeding seasons but selected against following warm breeding seasons. An 'individual animal model' describes a decline in the genetic values of breeding males during the study, which simulations showed was unlikely to result from drift alone. These results are thus consistent with adaptive evolution of a sexually selected trait in response to climate change.