体大小的进化是由血统特定的专业化决定的,而不是全球趋势
Bruna M Farina1,2,3, Pedro L Godoy3,4, Roger B J Benson5
1Department of Biology University of Fribourg Fribourg Switzerland.
Ecology and evolution
|June 29, 2023
概括
息地,而不是温度或方向趋势,显著影响了乌体型的进化. 陆地海变得更大,而海洋海的尺寸变化随着时间的推移而减少.
科学领域:
- 古生物学的古生物学
- 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:
- 生物体表现出不同的体型和形状,宏观进化研究研究进化动态.
- 乌 (Testudinata) 显示显著的身体大小差异,特别是考虑到它们广泛的化石记录.
研究的目的:
- 为了探索海体型的进化.
- 为了确定影响观察到的身体尺寸模式的因素.
- 为了评估乌体型进化的长期方向趋势.
主要方法:
- 编制了一套全面的乌体型数据集.
- 与古气温数据的相关性分析.
- 估计祖先的身体大小.
- 宏观进化模型拟合分析.
主要成果:
- 没有发现任何证据表明鱼体型的方向性进化 (科普法则).
- 古气温并没有显著影响整个经过时间的身体尺寸模式.
- 息地偏好显著影响了海的体型:淡水海的体型均,陆地海的体型较大,海洋海的体型差异较小.
结论:
- 乌的长期,普遍的宏观进化模式很可能是由特定群体的因素驱动的,特别是息地使用.
- 息地偏好是海体型进化的关键决定因素.
- 像科普规则这样的方向趋势似乎并不影响乌体型的进化.
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