在珀米亚-特里亚纪大灭绝期间,海洋类的异质选择性和形态演变
Xiaokang Liu1,2, Haijun Song3, Daoliang Chu1
1State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, China.
Nature ecology & evolution
|June 11, 2024
概括
大规模灭绝可以解生物多样性指标. 珀米亚-特里亚斯灭绝有选择性地影响了复杂的海洋形式,减少了某些类型的形态差异,但不是其他类型.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
背景情况:
- 生物多样性是通过分类学多样性和形态差异来衡量的,它们经常一起进化.
- 大规模灭绝大大减少了多样性,但它们对差异的影响不太了解.
- 波斯-纪大灭绝事件为研究这些动态提供了一个关键的案例研究.
研究的目的:
- 调查在珀米亚-三叠纪大灭绝期间的形态差异和灭绝选择性.
- 评估这一事件期间的选择性压力如何影响不同的海洋类.
- 了解多样性丧失和差距变化之间的关系.
主要方法:
- 开发了DeepMorph,这是一个用于从化石图像中自动提取形态特征的深度学习模型.
- 分析了6个海洋类的599个属的高分辨率时间数据集.
- 基于形态复杂性和装饰的评估灭绝选择性.
主要成果:
- 复杂和装饰的形式的选择性灭绝发生在类动物,类动物和类动物中.
- 双动物,类动物和类动物没有表现出形态选择性的灭绝.
- 在有选择性灭绝的群体中,更大的多样性丧失导致了显著的差异丧失;非选择性灭绝对差异的影响最小.
结论:
- 珀米亚-特里亚斯纪大灭绝对海洋类的形态选择性产生了异质的影响.
- 环境耐受性值可能影响了观察到的形态选择性的程度.
- 大规模灭绝可以通过对分类学多样性和形态差异的各种影响来重塑生物多样性和生态系统结构.
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