Ruan Jiaoyang, Timmermann Axel, Raia Pasquale, Yun Kyung-Sook, Zeller Elke, Mondanaro Alessandro, Di Febbraro Mirko, Lemmon Danielle, Castiglione Silvia, Melchionna Marina
Center for Climate Physics, Institute for Basic Science, Busan, South Korea.
Center for Climate Physics, Pusan National University, Busan, South Korea.
Science. 2023 Aug 11;381(6658):699-704. doi: 10.1126/science.add4459. Epub 2023 Aug 10.
When, where, and how often hominin interbreeding happened is largely unknown. We study the potential for Neanderthal-Denisovan admixture using species distribution models that integrate extensive fossil, archaeological, and genetic data with transient coupled general circulation model simulations of global climate and biomes. Our Pleistocene hindcast of past hominins' habitat suitability reveals pronounced climate-driven zonal shifts in the main overlap region of Denisovans and Neanderthals in central Eurasia. These shifts, which influenced the timing and intensity of potential interbreeding events, can be attributed to the response of climate and vegetation to past variations in atmospheric carbon dioxide and Northern Hemisphere ice-sheet volume. Therefore, glacial-interglacial climate swings likely played an important role in favoring gene flow between archaic humans.
人类何时、何地以及多久进行一次杂交繁殖在很大程度上尚不清楚。我们使用物种分布模型研究尼安德特人与丹尼索瓦人杂交的可能性，该模型将大量化石、考古和基因数据与全球气候和生物群落的瞬态耦合大气环流模型模拟相结合。我们对过去人类栖息地适宜性的更新世后推显示，在欧亚大陆中部丹尼索瓦人和尼安德特人的主要重叠区域，气候驱动的地带性变化显著。这些变化影响了潜在杂交事件的时间和强度，可归因于气候和植被对过去大气二氧化碳和北半球冰盖体积变化的响应。因此，冰期-间冰期的气候波动可能在促进古代人类之间的基因流动方面发挥了重要作用。
