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地球上的物种化是由陆地兰花的全球冷却所驱动的

Jamie B Thompson¹, Katie E Davis², Harry O Dodd¹

¹The Milner Centre for Evolution, Department of Life Sciences, University of Bath, Bath BA2 7AY, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America

|July 10, 2023

概括

全球冷却,而不是时间,显著推动了陆地兰花的多样化. 这种由温度驱动的物种化是全球主要地区兰花生物多样性的关键因素.

科学领域:

进化生物学进化生物学
古气候学古气候学
植物学植物学

背景情况:

气候变化是物种多样化的已知驱动因素.
以前的研究表明,局部气候和时间比全球气候变化更有影响力.
高种类类型需要专注的分析来了解多样化驱动因素.

研究的目的:

调查全球变冷对陆地兰花生物多样性的影响.
解开气候变化,地理和时间在兰花物种化中的作用.
为了确定陆地兰花是否是温度驱动物种化的典型例子.

主要方法:

在Orchidoideae亚家族中对1475个物种进行了家族遗传学分析.
进行比较建模以评估物种化率驱动因素 (全球冷却与时间对比).
分析了超过250万个地理引用记录,以绘制多样化模式.

主要成果:

陆地兰花的物种化率主要取决于历史上的全球降温.
冷却驱动的物种化模型的可能性是基于时间的积累的700倍以上.
陆地兰花显示了温度刺激的物种化最强的案例之一.
全球冷却同时推动了所有七个主要兰花生物区域的多样化.

结论:

历史性的全球降温是陆地兰花生物多样性的重要,可量化的驱动因素.
陆地兰花为了解气候变化对物种的长期影响提供了一个强大的模型.
这些发现与普遍认为全球气候变化影响不一致的观点形成鲜明对比.

关键词:

生物多样性生物多样性生物地质学生物地质学气候变化气候变化气候变化多样化的多样化多样化的多样化宏观演变的发生.

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