Speciation rates are correlated with changes in plumage color complexity in the largest family of songbirds
Speciation rates are correlated with changes in plumage color complexity in the largest family of songbirds
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物种形成率与最大鸣禽家族的羽毛颜色复杂性变化相关
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Burns
中科院分区：
文献类型：
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作者：
Rosalyn Price;Allison J. Shultz;K. Burns
虽然进化理论预测了精心装饰的进化与物种形成之间的联系，但物种形成与装饰进化之间联系的经验证据一直是混合的。在鸟类中，进化出越来越复杂和多彩的羽毛可能会通过引入前合子交配障碍来促进物种形成。然而，颜色复杂性的整体变化，包括增加和减少，也可能通过改变介导生殖选择的性信号来促进物种形成。在这里，我们研究复杂的羽毛和物种形成率之间的关系，在最大的家庭鸣禽，tanagers（Thraupidae）。首先，我们测试了具有更复杂羽毛颜色的物种是否与更高的物种形成率相关，并没有发现相关性。然后，我们测试男性或女性的羽毛颜色复杂性的演变率是否与物种形成率相关。我们发现，羽毛复杂性进化率的提高与更高的物种形成率有关，无论性别如何，也不管物种是进化得更复杂还是不那么复杂。这些结果延伸到整个羽毛颜色的复杂性和区域的重要信号（冠和喉），但不是非信号区域（背部和翼尖）。我们的研究结果表明，羽毛性状的变化程度，而不是羽毛复杂性的整体价值，可能在物种形成中发挥作用。
Although evolutionary theory predicts an association between the evolution of elaborate ornamentation and speciation, empirical evidence for links between speciation and ornament evolution has been mixed. In birds, the evolution of increasingly complex and colorful plumage may promote speciation by introducing prezygotic mating barriers. However, overall changes in color complexity, including both increases and decreases, may also promote speciation by altering the sexual signals that mediate reproductive choices. Here, we examine the relationship between complex plumage and speciation rates in the largest family of songbirds, the tanagers (Thraupidae). First, we test whether species with more complex plumage coloration are associated with higher speciation rates and find no correlation. We then test whether rates of male or female plumage color complexity evolution are correlated with speciation rates. We find that elevated rates of plumage complexity evolution are associated with higher speciation rates, regardless of sex and whether species are evolving more complex or less complex ornamentation. These results extend to whole‐plumage color complexity and regions important in signaling (crown and throat) but not nonsignaling regions (back and wingtip). Our results suggest that the extent of change in plumage traits, rather than overall values of plumage complexity, may play a role in speciation.
影响因子：
64.8
作者：
Jetz, W.;Thomas, G. H.;Mooers, A. O.
通讯作者：
Mooers, A. O.