在原始人中,多样性依赖的物种化和灭绝
Laura A van Holstein1, Robert A Foley2
1Leverhulme Centre for Human Evolutionary Studies, Department of Archaeology, University of Cambridge, Cambridge, UK. lav22@cam.ac.uk.
Nature ecology & evolution
|April 17, 2024
概括
跨物种竞争,而不仅仅是气候,影响了人类进化. 人类属表现出罕见的多样性依赖的物种化和灭绝模式,表明独特的进化压力.
科学领域:
- 古人类学古人类学.
- 进化生物学 进化生物学
- 宏观进化研究 宏观进化研究
背景情况:
- 人类的物种化和灭绝研究往往忽视了物种间的竞争,而是专注于气候变化.
- 更广泛的脊椎动物研究表明,物种多样性与物种化和灭绝率之间的相关性,突出了竞争的潜在作用.
研究的目的:
- 调查人类的物种化和灭绝率是否表现出多样性依赖,反映了在其他脊椎动物中观察到的模式.
- 在人类宏观进化中区分物种间竞争和气候变化的作用.
主要方法:
- 使用化石发生数据和贝叶斯分析与保存变异性先验估计人类物种化和灭绝率.
- 分析跨人类类型的物种化率,以评估多样性依赖.
- 对人类的多样性依赖模式与更广泛的脊椎动物宏观进化趋势进行比较.
主要成果:
- 人类的物种化通常受限于分类范围内的多样性,尽管奥斯特拉罗皮塞克斯和帕兰索普斯分类在灭绝之前没有达到这些限制.
- 人类灭绝率与物种多样性没有相关,这表明气候的影响更大.
- 人类属表现出不寻常的模式:积极的多样性依赖的物种化和消极的多样性依赖的灭绝,在更广泛的生命树中很少见.
结论:
- 生物相互作用,特别是物种间的竞争,在Homo宏观进化中发挥了重要而以前被低估的作用,特别是在物种化中.
- 人类独特的宏观进化模式可能源于竞争驱动的范围扩张,并由生态创新促进.
- 在更广泛的脊椎动物背景下了解人类进化为我们提供了对我们自己的血统和更远的进化过程的新见解.
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