General statistical model shows that macroevolutionary patterns and processes are consistent with Darwinian gradualism.
General statistical model shows that macroevolutionary patterns and processes are consistent with Darwinian gradualism.
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DOI：
10.1038/s41467-022-28595-z
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发表时间：
2022-03-02
影响因子：
16.6
通讯作者：
Meade A
中科院分区：
文献类型：
--
作者：
Pagel M;O'Donovan C;Meade A
宏观进化给达尔文和后来的理论家带来了困难，因为物种的表型经常突然变化，或者经历长时间的停滞，这都与渐进变化或渐进主义的理论背道而驰。我们引入了一个统计模型，通过估计两种历史变化来适应这种不均匀的进化景观：方向变化，改变平均表型沿着分支的系统发育树，和进化能力的变化，改变一个分支的能力，探索其特征空间。在哺乳动物中，我们发现这两个过程对解释宏观进化做出了实质性的独立贡献，并且很少有联系。可进化性增强的“分水岭”时刻大大超过了进化潜力的降低，而大的或突然的表型变化在统计上可以解释为有偏见的随机游走，这使得宏观进化理论能够与渐进主义微观进化的语言和概念相结合。我们的研究结果重铸宏观进化现象，说明同时考虑各种进化过程的必要性。宏观进化论给达尔文和后来的理论家带来了困难，因为物种经常突然变化，或者经历长时间的停滞，这都与渐进变化或渐进主义的理论背道而驰。在这里，作者提出了一个宏观进化的统计模型，适应这种不均匀的进化景观，并显示了即使是突然的宏观进化变化是如何与渐进的微观进化过程相兼容的。
Macroevolution posed difficulties for Darwin and later theorists because species’ phenotypes frequently change abruptly, or experience long periods of stasis, both counter to the theory of incremental change or gradualism. We introduce a statistical model that accommodates this uneven evolutionary landscape by estimating two kinds of historical change: directional changes that shift the mean phenotype along the branches of a phylogenetic tree, and evolvability changes that alter a clade’s ability to explore its trait-space. In mammals, we find that both processes make substantial independent contributions to explaining macroevolution, and are rarely linked. ‘Watershed’ moments of increased evolvability greatly outnumber reductions in evolutionary potentials, and large or abrupt phenotypic shifts are explicable statistically as biased random walks, allowing macroevolutionary theory to engage with the language and concepts of gradualist microevolution. Our findings recast macroevolutionary phenomena, illustrating the necessity of accounting for a variety of evolutionary processes simultaneously. ‘Macroevolution posed difficulties for Darwin and later theorists because species frequently change abruptly, or experience long periods of stasis, both counter to the theory of incremental change or gradualism. Here, the authors propose a macroevolutionary statistical model that accommodates this uneven evolutionary landscape, and shows how even abrupt macroevolutionary changes are compatible with gradualist microevolutionary processes.’
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影响因子：
9.2
作者：
Hruschka, Daniel J.;Branford, Simon;Smith, Eric D.;Wilkins, Jon;Meade, Andrew;Pagel, Mark;Bhattacharya, Tanmoy
通讯作者：
Bhattacharya, Tanmoy
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影响因子：
10.1
作者：
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通讯作者：
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