Afonso Silva Ana C, Maliet Odile, Aristide Leandro, Nogués-Bravo David, Upham Nathan, Jetz Walter, Morlon Hélène
Institut de biologie de l'ENS (IBENS), Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université PSL, Paris, France.
CE3C - Centre for Ecology, Evolution and Environmental Changes, Department of Animal Biology, Faculdade de Ciências da Universidade de Lisboa, University of Lisbon, Lisboa, Portugal.
Nat Commun. 2025 Feb 20;16(1):1796. doi: 10.1038/s41467-025-56820-y.
Genetic diversity is critical for species evolution and their adaptability to global changes, while speciation rate is critical for explaining large-scale patterns of species richness. Exploring correlates of variation in genetic diversity and speciation rates across species is a major interest of evolutionary biologists, but these two questions have mostly been investigated independently. Here, we assess the relationship between intra-specific genetic diversity and speciation rate for 1897 mammal species (~one third of the total diversity) covering all mammalian orders. We find a negative association between mitochondrial genetic diversity and speciation rate across mammalian clades globally. This association is not accounted for by differences in the ecological attributes of species. Our findings suggest a systematic link between micro- and macroevolutionary processes that need to be better understood and considered when investigating determinants of either genetic diversity or speciation rates.
遗传多样性对于物种进化及其对全球变化的适应性至关重要，而物种形成速率对于解释物种丰富度的大规模格局至关重要。探索物种间遗传多样性和物种形成速率变化的相关性是进化生物学家的主要兴趣所在，但这两个问题大多是独立研究的。在这里，我们评估了涵盖所有哺乳动物目、共1897种哺乳动物（约占总多样性的三分之一）的种内遗传多样性与物种形成速率之间的关系。我们发现，全球哺乳动物类群的线粒体遗传多样性与物种形成速率之间呈负相关。这种关联不能用物种生态属性的差异来解释。我们的研究结果表明，微观和宏观进化过程之间存在系统联系，在研究遗传多样性或物种形成速率的决定因素时，需要更好地理解和考虑这一联系。
