Interspecific covariation in courtship displays, iridescent plumage, solar orientation, and their interactions in hummingbirds
Interspecific covariation in courtship displays, iridescent plumage, solar orientation, and their interactions in hummingbirds
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求偶展示、虹彩羽毛、太阳方向的种间共变及其在蜂鸟中的相互作用
DOI：
10.1086/704774
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
McGraw, Kevin J.
中科院分区：
文献类型：
--
作者：
Simpson, Richard Kendall;McGraw, Kevin J.
许多动物使用多种信号进行交流。从历史上看，大多数注意力都集中在多个信号如何孤立地进化和起作用，但最近的工作集中在它们如何相互作用并产生独特的信号相互作用特性上。这些相互作用特性在物种内部有所不同，但对它们在物种之间的变化知之甚少，特别是关于特定信号的表达如何驱动不同的信号相互作用机制。本文研究了6种北美蜂蜂鸟的彩色羽毛、求偶（穿梭）展示、太阳环境和展示过程中雄性颜色外观（即信号相互作用特性）之间的进化关系。我们发现，颜色外观与行为和羽毛特性呈负向共变，例如，表现更夸张的物种在求偶期间表现得更艳丽，而羽毛更夸张的物种在求偶期间表现得更明亮/更鲜艳，颜色变化最小。通过了解信号相互作用特性如何随信号而变化，我们能够发现这些特征背后复杂的多层进化关系，并揭示信号进化的新潜在驱动因素。我们的研究结果强调了研究动物信号之间的相互作用特性如何提供了对这些特征如何进化和多样化的更丰富的理解。
Many animals communicate using multiple signals. Historically, most attention was paid to how multiple signals evolve and function in isolation, but recent work has focused on how they may interact with one another and produce unique signal interaction properties. These interaction properties vary within species, but little is known about how they vary among species, especially in regard to how the expression of particular signals may drive different signal interaction mechanisms. We studied the evolutionary relationships between iridescent plumage, courtship (shuttle) displays, solar environment, and male color appearance during a display (i.e., the signal interaction property) among six species of North American bee hummingbirds. We found that color appearances covary with behavioral and plumage properties, which themselves negatively covary, such that species with more exaggerated displays appeared flashier during courtship, while species with more exaggerated plumage appeared brighter/more colorful with minimal color changes. By understanding how signal interaction properties covary with signals, we were able to discover the complex multilayered evolutionary relationships underlying these traits and uncover new potential drivers of signal evolution. Our results highlight how studying the interaction properties between animal signals provides a richer understanding of how those traits evolved and diversified.