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机械学类动力学模型没有提供确的证据表明,在非鸟类恐龙最终灭绝之前,它们的数量正在下降

Bethany J Allen^1,2, Maria V Volkova Oliveira³, Tanja Stadler^1,2

¹Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland.

Cambridge prisms. Extinction

|March 13, 2025

概括

讨论了白纪-古纪灭绝前的恐龙多样性趋势. 我们的研究表明,模型假设,特别是采样偏差,对恐龙衰退的结论产生重大影响.

科学领域:

古生物学的古生物学
进化生物学进化生物学
计算生物学计算生物学

背景情况:

恐龙的进化历史和多样性趋势是正在进行的科学辩论的主题.
了解灭绝前的多样化对于解释白纪-古世 (K-Pg) 事件的影响至关重要.

研究的目的:

使用植物动力学模型估计非鸟类恐龙的多样化轨迹.
调查模型假设和家族遗传数据对推断的恐龙多样性趋势的影响.

主要方法:

两种不同的植物动力学模型应用于非鸟类恐龙的时间校准的植物学.
对遗传学拓学,分支长度和采样偏差假设的敏感性分析.

主要成果:

推断的恐龙多样化轨迹对所使用的植物动力学模型的假设非常敏感.
不完整的采样是影响是否检测到恐龙多样性的长期下降的一个重要因素.
遗传学树的拓和树枝长度也极大地影响了对多样化模式的估计.

结论:

目前的家族动力学模型和可用的家族遗传数据在确定K-Pg前恐龙多样性趋势方面存在挑战.
未来的研究需要更强大的模型来考虑采样偏差和更全面,更准确的族系.
解决关于恐龙灭绝的争论需要在方法方法和数据质量方面取得进展.

关键词:

凯诺时代 (Cenozoic) 是一个时代.多样化的多样化多样化的多样化化石化石化石的化石人类的族群学.

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