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在新热带草花粉中,2300万年的形态进化记录

Caixia Wei¹, Mao Li², Limi Mao³

¹Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, 1090GE, the Netherlands.

The New phytologist

|October 27, 2024

概括

南美洲的草花粉微型装饰在数百万年内演变,显示出一贯向不那么密集的模式转变. 这项研究揭示了草 (Poaceae) 随着时间的推移所具有的关键进化特征.

科学领域:

古植物学是古植物学.
进化生物学进化生物学
南美植物群南美植物群

背景情况:

南美洲以草为主导的生物群具有悠久的历史,但它们的进化轨迹和驱动因素尚未得到充分理解.
了解草的进化对于重建过去的生态系统和预测未来的生物群动态至关重要.

研究的目的:

为了调查草 (Poaceae) 花粉微观装饰的进化历史和驱动因素,自米奥生早期以来,在新热带地区.
量化草花粉在地质时间尺度上的形态变化.

主要方法:

使用扫描电子显微镜 (SEM) 进行草花粉的高分辨率成像.
应用计算分析来量化花粉的外形态学.
汇集了三个时间空间花粉数据集,从米奥森早期到现在.

主要成果:

确定了三个独特的时空花粉群体,具有独特的,部分重叠的外表形态空间区域.
随着时间的推移,观察到花粉微观装饰的持续方向变化,朝着更不密集的模式发展.
尽管装饰的方向发生了变化,但占用的形态空间的范围没有显著变化.

结论:

这项研究提供了通过时间对Poaceae花粉微观装饰的形态变异的首个全面观点.
假设进化漂移,定向选择和大陆规模的迁移驱动了草花粉的变化,自中世纪初以来.
结论:高花粉微观装饰的多样性与Neogene中的草的进化成功有关.

关键词:

新一代人新一代人进化演化演化演化演化演化演化演化形态空间是一个形态空间.花粉多样性花粉多样性定量图像分析定量图像分析

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