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普莱斯托时代的冰川导致了物种内部遗传多样性的度梯度

Emanuel M Fonseca¹, Tara A Pelletier², Sydney K Decker¹

¹Department of Evolution, Ecology and Organismal Biology, The Ohio State University, Columbus, OH, United States.

Evolution letters

|October 13, 2023

概括

由于历史气候变化,热带物种的遗传多样性比温带物种更大. 冰川周期对人口规模产生了重大影响,影响了横跨度的遗传多样性.

科学领域:

进化生物学进化生物学
遗传学是一个遗传学.
生物多样性科学生物多样性科学

背景情况:

跨物种的遗传多样性对生物多样性至关重要.
众所周知,四季气候变化和冰川期通过范围的变化和人口规模的变化影响了遗传多样性.
冰川对遗传多样性的全球影响尚不清楚.

研究的目的:

在全球范围内量化广泛的植物和动物物种中的核酸多样性.
研究度对物种内遗传多样性的影响.
探索进化过程,如人口人口统计学变化,这可能解释观察到的模式.

主要方法:

核酸多样性的分析,一种衡量物种内遗传多样性的方法.
利用来自超过38000个物种的数百万个样本的地理参考DNA序列.
计算总结统计数据以衡量人口人口变化,并将其与度相关联.

主要成果:

与非热带物种相比,热带物种表现出明显更高的物种内遗传多样性.
人口人口统计数据和度之间发现了显著的相关性.
非热带物种与中性预期的偏差更大,这表明与普莱斯托时代冰川周期相关的历史人口规模波动.

结论:

季度气候扰动可能在塑造物种丰富度的度梯度方面发挥着比以前理解的更重要的作用.
历史上的气候变化,特别是冰川,对物种内遗传多样性产生了深刻和全球可见的影响.
这些发现强调了考虑过去的气候事件对于理解当前生物多样性的模式的重要性.

关键词:

普莱斯托时代的冰川化.种内特定的遗传多样性.度梯度的度梯度是指度上的梯度.核酸多样性的核酸多样性

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