The effects of ecology and behavior on the evolution of coloration in Coraciiformes

The effects of ecology and behavior on the evolution of coloration in Coraciiformes
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生态和行为对 Coraciiformes 颜色进化的影响

DOI:
10.1093/beheco/arad008
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发表时间:
2023
期刊:
影响因子:
2.4
通讯作者:
Babarovic F
Babarovic F
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Babarovic F

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是什么推动了鸟类羽毛颜色的进化?鸟类的颜色可能是在自然选择和性选择的双重作用下形成的,自然选择可能倾向于向隐蔽或伪装的方向进化,而性选择可能倾向于向显著性的方向进化。对自然选择的反应被预测与物种的生态、行为和生活史有关。主要的假设集中在栖息地和光环境、繁殖策略、领土和狩猎行为上。我们使用系统发育比较方法和从博物馆标本中测量的羽毛颜色的彩色和无色特性数据,测试了非雀形目鸟类的彩色分支Coraciiformes颜色变化的这些潜在原因。我们发现coraciformes颜色进化的相关因素在不同的身体区域有所不同,并取决于焦点颜色特性(羽毛颜色的彩色或消色差特性)。虽然光环境对不同身体区域的颜色特性都有广泛的影响,但与行为特征相关的选择压力对空间的影响更局部(如领地性对翅膀羽毛的消色差特性和狩猎策略对腹部羽毛的色差特性)。我们的研究结果揭示了可能在其他鸟类分支中存在的一般模式,以及更细微的选择效应,这些选择效应可能是通过信号传递者和接受者的视觉生态以及喙形物种的行为特征来调节的。
What drives the evolution of plumage color in birds? Bird color is likely to be under both natural and sexual selection where natural selection may favor evolution toward crypsis or camouflage whereas sexual selection may favor evolution toward conspicuousness. The responses to selection are predicted to relate to species’ ecology, behavior, and life history. Key hypotheses have focused on habitat and light environment, breeding strategy, territoriality, and hunting behavior. We tested these potential causes of color variation in the Coraciiformes, a colorful clade of non-passerine birds, using phylogenetic comparative methods and data on chromatic and achromatic properties of plumage coloration measured from museum specimens. We found that correlates of color evolution in Coraciiformes vary across body regions and depend on the focal color property (chromatic or achromatic properties of plumage coloration). While the light environment showed widespread effects on coloration in multiple body regions for both color properties, selection pressures related to behavioral characteristics had more spatially localized effects (e.g. territoriality on achromatic properties of wing feathers and hunting strategy on chromatic properties of belly feathers). Our results reveal both general patterns that may hold across other bird clades and more nuanced effects of selection that are likely to be mediated through the visual ecology of the signaler and receiver and the behavioral characteristics of Coraciiform species.
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