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开花植物在空间和时间上的多样化

Dimitar Dimitrov^1,2,3,4, Xiaoting Xu^1,3,5, Xiangyan Su^1,6

¹Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.

Nature communications

|November 22, 2023

概括

在大规模灭绝事件之后,开花植物的多样化加速了,现在在温带地区发现了更年轻,快速多样化的属. 这与主导热带地区的较老,生长较慢的属相形成鲜明对比.

科学领域:

进化生物学进化生物学
古生物学的古生物学
生态生态学生态生态学

背景情况:

开花植物 (花) 的多样化是进化生物学中一个长期存在的难题,经常被称为'达尔文的第二个可憎的'.
了解植物多样化的全球时空模式对于理解当前的生物多样性至关重要.
之前的研究还没有完全阐明了跨地质时间和地理空间的血管精子多样化的动态.

研究的目的:

通过空间和时间来研究血管种的多样化动态.
分析属年龄,多样化率和地理分布之间的关系.
确定塑造全球花植物多样性模式的因素.

主要方法:

为开花植物构建一个新的属级别的植物谱.
汇编了14244种苗属的全球分布数据.
分析不同地质时期和地理区域的多样化率.

主要成果:

多样化速度在白纪早期增加,稳定到白纪-古纪灭绝,然后再次上升.
具有高多样化率的年轻属在温带和干旱地区普遍存在.
具有较低多样化率的较旧属集中在热带地区,显示多样化模式和属多样性之间存在负相关性.

结论:

全球环境的变化,特别是自古世以来,已经显著塑造了开花植物的多样性模式.
非热带地区的多样化率似乎更高,支持新兴的科学共识.
这项研究为血管苗的进化历史和地理分布提供了新的见解.

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