Innovation and elaboration on the avian tree of life.

Innovation and elaboration on the avian tree of life.
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DOI:
10.1126/sciadv.adg1641
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发表时间:
2023-10-27
期刊:
影响因子:
13.6
通讯作者:
Thomas, Gavin H.
Thomas, Gavin H.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Guillerme, Thomas;Bright, Jen A.;Cooney, Christopher R.;Hughes, Emma C.;Varley, Zoe K.;Cooper, Natalie;Beckerman, Andrew P.;Thomas, Gavin H.

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被广泛记录的表型多样性的巨大进化跳跃继续困扰着研究人员,因为尚不清楚这些显著的变化是否会出现在微进化过程中。在这里,我们使用新的方法来模拟多变量特征来解决这个问题,以评估鸟喙进化中精致和创新的规模和分布。我们发现,沿着表型变化主轴的精化进化,在宏观和超进化尺度上都是常见的,而创新,即远离表型变化主轴的进化,在超进化尺度上更为突出。物种喙形状在大进化尺度上的表型变化的主轴是跨支系创新的一个新特性。我们的分析表明,通过创新对表型进行重新定位是一条普遍存在的分化路线,仅通过渐进变化就可以产生分歧,从而为进化开辟了进一步探索的途径。物种喙以创新和精细为主,而整个支系主要是创新。
Widely documented, megaevolutionary jumps in phenotypic diversity continue to perplex researchers because it remains unclear whether these marked changes can emerge from microevolutionary processes. Here, we tackle this question using new approaches for modeling multivariate traits to evaluate the magnitude and distribution of elaboration and innovation in the evolution of bird beaks. We find that elaboration, evolution along the major axis of phenotypic change, is common at both macro- and megaevolutionary scales, whereas innovation, evolution away from the major axis of phenotypic change, is more prominent at megaevolutionary scales. The major axis of phenotypic change among species beak shapes at megaevolutionary scales is an emergent property of innovation across clades. Our analyses suggest that the reorientation of phenotypes via innovation is a ubiquitous route for divergence that can arise through gradual change alone, opening up further avenues for evolution to explore. Species beaks innovate and elaborate while whole clades mainly innovate.
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