Brain shape convergence in the adaptive radiation of New World monkeys
Brain shape convergence in the adaptive radiation of New World monkeys
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DOI：
10.1073/pnas.1514473113
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发表时间：
2016-02-23
影响因子：
11.1
通讯作者：
Ivan Perez, S.
中科院分区：
文献类型：
--
作者：
Aristide, Leandro;dos Reis, Sergio Furtado;Ivan Perez, S.
灵长类动物构成了最多样化的哺乳动物分支之一，其多样化的一个显著特征是脑形态的进化。然而，这些变化背后的进化过程和生态因素在很大程度上是未知的。在这项工作中，我们调查大脑形状的变化，新世界猴在其适应性辐射在不同的生态维度。我们的研究结果表明，在这个分支的大脑多样化可以解释调用一个模型的自适应峰值转移到独特的和共享的最优值，定义了一个多维的生态位假说。特别是，我们表明，趋同脑表型的进化可能与群体规模相关的生态因素有关（例如，社会复杂性）。总之，我们的研究结果突出了大脑进化的复杂性和灵长类进化支进化多样化过程中大脑形状变化的生态意义。
Primates constitute one of the most diverse mammalian clades, and a notable feature of their diversification is the evolution of brain morphology. However, the evolutionary processes and ecological factors behind these changes are largely unknown. In this work, we investigate brain shape diversification of New World monkeys during their adaptive radiation in relation to different ecological dimensions. Our results reveal that brain diversification in this clade can be explained by invoking a model of adaptive peak shifts to unique and shared optima, defined by a multidimensional ecological niche hypothesis. Particularly, we show that the evolution of convergent brain phenotypes may be related to ecological factors associated with group size (e.g., social complexity). Together, our results highlight the complexity of brain evolution and the ecological significance of brain shape changes during the evolutionary diversification of a primate clade.