Evolution of correlated complexity in the radically different courtship signals of birds-of-paradise.
Evolution of correlated complexity in the radically different courtship signals of birds-of-paradise.
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DOI：
10.1371/journal.pbio.2006962
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发表时间：
2018-11
期刊：
影响因子：
9.8
通讯作者：
Scholes E 3rd
中科院分区：
文献类型：
--
作者：
Ligon RA;Diaz CD;Morano JL;Troscianko J;Stevens M;Moskeland A;Laman TG;Scholes E 3rd
求偶时使用的雌蕊在不同物种之间往往有很大的差异，这反映了择偶偏好功能和自然选择所施加的限制之间的进化相互作用。因此，了解负责装饰多样化的进化动力学一直是进化生物学的一个长期挑战。然而，比较不同物种之间以及物种内部不同类别的装饰品，对于理解性信号的多样性是一个深刻的挑战。使用新的方法和独特的自然历史数据集，我们探讨了装饰进化的进化模式，在一个组-天堂鸟-表现出戏剧性的表型多样化广泛认为是由性选择驱动。而不是装饰类型之间的权衡最初设想的达尔文和华莱士，我们发现之间的正相关性的跨模态（视觉/声学）信号指示功能整合的观赏性状成一个复合单位的“求爱表型”。此外，由于广泛的理论和经验支持的想法，系统的鲁棒性功能重叠和相互依赖性，促进进化创新，我们认为天堂鸟辐射广泛通过观赏表型空间的结果，我们在系统发育的规模文件的求爱表型的鲁棒性。我们认为，在求偶表型类群之间的鲁棒性的程度可以提供新的见解的相对影响的性和自然选择的表型辐射。动物在亲缘关系上经常有很大的差异，即使在亲缘关系很近的物种之间也是如此。理解这种变异背后的模式是一个重大的挑战，需要在截然不同的性状之间进行比较，就像比较苹果和橙子一样。在这里，我们使用新的分析方法来量化在观赏多样性和丰富性的变化在非常不同的天堂鸟，性选择如何深刻地塑造生物表型的教科书的例子。我们发现，颜色和声学的复杂性，沿着与行为和声学的复杂性，是正相关的整个进化的时间尺度。装饰类之间的积极联系表明，选择作用于相关的特征套件复合求偶表型，这种整合可能是我们在天堂鸟中看到的信号形式极端变化的部分原因。
Ornaments used in courtship often vary wildly among species, reflecting the evolutionary interplay between mate preference functions and the constraints imposed by natural selection. Consequently, understanding the evolutionary dynamics responsible for ornament diversification has been a longstanding challenge in evolutionary biology. However, comparing radically different ornaments across species, as well as different classes of ornaments within species, is a profound challenge to understanding diversification of sexual signals. Using novel methods and a unique natural history dataset, we explore evolutionary patterns of ornament evolution in a group—the birds-of-paradise—exhibiting dramatic phenotypic diversification widely assumed to be driven by sexual selection. Rather than the tradeoff between ornament types originally envisioned by Darwin and Wallace, we found positive correlations among cross-modal (visual/acoustic) signals indicating functional integration of ornamental traits into a composite unit—the “courtship phenotype.” Furthermore, given the broad theoretical and empirical support for the idea that systemic robustness—functional overlap and interdependency—promotes evolutionary innovation, we posit that birds-of-paradise have radiated extensively through ornamental phenotype space as a consequence of the robustness in the courtship phenotype that we document at a phylogenetic scale. We suggest that the degree of robustness in courtship phenotypes among taxa can provide new insights into the relative influence of sexual and natural selection on phenotypic radiations. Animals frequently vary widely in ornamentation, even among closely related species. Understanding the patterns that underlie this variation is a significant challenge, requiring comparisons among drastically different traits—like comparing apples to oranges. Here, we use novel analytical approaches to quantify variation in ornamental diversity and richness across the wildly divergent birds-of-paradise, a textbook example of how sexual selection can profoundly shape organismal phenotypes. We find that color and acoustic complexity, along with behavior and acoustic complexity, are positively correlated across evolutionary timescales. Positive links among ornament classes suggests that selection is acting on correlated suites of traits—a composite courtship phenotype—and this integration may be partially responsible for the extreme variation in signal form that we see in birds-of-paradise.
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影响因子：
56.9
作者：
Carlson, Bruce A.;Hasan, Saad M.;Arnegard, Matthew E.
通讯作者：
Arnegard, Matthew E.
DOI：
10.1098/rstb.1993.0060
发表时间：
1993-05-29
影响因子：
6.3
作者：
ENDLER, JA
通讯作者：
ENDLER, JA
影响因子：
2.9
作者：
Arnegard, Matthew E.;McIntyre, Peter B.;Hopkins, Carl D.
通讯作者：
Hopkins, Carl D.
影响因子：
2.5
作者：
GUILFORD, T;DAWKINS, MS
通讯作者：
DAWKINS, MS
影响因子：
2.1
作者：
Gomes, A. C. R.;Funghi, C.;Cardoso, G. C.
通讯作者：
Cardoso, G. C.