化石多样化速率的明显时间缩短是由采样偏差引起的
Bouwe R Reijenga1, Roger A Close1
1Department of Earth Sciences, University of Oxford, Oxford OX1 3AN, UK.
Current biology : CB
|January 24, 2025
概括
变种和灭绝率以及生物群的年龄之间的负比例关系可能是不完整的化石采样的产物. 对采样偏差的纠正显示,这些趋势在海洋动物化石记录中不存在.
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:
- 在分子族系和化石时间序列中观察到物种化/灭绝率和类年龄之间的负缩放关系.
- 这种共识表明有一个普遍的原因,但也提出了关于微观和宏观进化一致性的问题.
- 化石数据中负率缩放的有效性需要进一步调查.
研究的目的:
- 为了分析海洋动物化石记录在过去的53880万年Phanerozoic.
- 调查化石数据中负率缩放的存在和强度.
- 为了确定观察到的速率缩放是否是一种真正的进化信号或采样工件.
主要方法:
- 对海洋动物化石记录的分析,跨越5388万年.
- 计算人均物种化和灭绝率.
- 基于年龄范围的方法与采样纠正指标的率的比较.
- 模拟以评估抽样不完整性对速率缩放的影响.
主要成果:
- 负利率缩放是基于标准年龄范围的人均利率.
- 当应用考虑采样偏差的方法时,这种缩放显著减少或不存在.
- 模拟表明,不完整的物种发生率抽样可以诱导速率缩放.
- 在分析的化石集群中没有发现任何显著的缩放关系,当采样偏差被解决时.
结论:
- 化石记录中明显的负率缩放可能是由采样文物和分类学实践引起的.
- 真正的负利率缩放可能不是整个宏观进化的普遍现象.
- 化石数据中没有速度缩放,这限制了对真正的宏观进化过程的理解,特别是如果它存在于分子系系中.
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