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量化了非凡的化石保存对深度时间的遗传学数据的全球可用性的影响
C Henrik Woolley1,2, David J Bottjer2, Frank A Corsetti2
1Dinosaur Institute, Natural History Museum of Los Angeles County, Los Angeles, California, United States of America.
PloS one
|February 14, 2024
概括
特殊的化石保存 ("lagerstätten") 可以影响进化树. 然而,富有化石记录的群体受到影响较小,甚至沙丘也可能表现出"lagerstätten效应".
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 人类遗传学 是一个学科.
背景情况:
- 化石 lagerstätten 提供了无与伦比的保存,显著影响我们对生物多样性和进化的理解.
- "lagerstätten效应"可以在族遗传学分析中引入偏见,这是进化重建的一个未被充分探索的方面.
- 了解这种偏见对于准确地从化石记录中重建进化关系至关重要.
研究的目的:
- 量化非鸟类类类恐龙,中生代鸟类和化石形动物的全球化石记录中的基因信息.
- 为了比较lagerstätten沉积物的影响与其他含化石沉积物的植物遗传信息含量和分类类别选择.
- 调查非传统化石沉积物中"lagerstätten效应"的可能性.
主要方法:
- 在1,327种非鸟类类类动物,中生鸟类和化石类动物中量化了家族遗传信息.
- 比较了由 lagerstätten 和其他化石沉积物影响的家族遗传信息含量和分类型选择.
- 分析了形态特征数据集,以评估家族遗传信息的变化.
主要成果:
- 具有广泛的全球化石记录的分类学群体 (例如,非鸟类类热足动物) 对"lagerstätten效应"的脆弱性降低.
- Lagerstätten 沉积物包含了不同分类群的可比量类遗传信息,尽管数据集的变化.
- 戈壁沙漠的晚白纪沙丘沉积物显示了对状动物的原始发育有显著的"lagerstätten效应".
结论:
- "lagerstätten效应"对遗传学重建有着不同的影响,这取决于一个群体的化石记录的完整性.
- 特殊的保存并不是影响家族遗传信息的唯一因素;其他沉积物类型也可以产生重大影响.
- 需要进一步的研究来量化各种地质构造中存在的进化信息.
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