埃迪亚卡尔末期灭绝的原因和后果:最新情况
Simon A F Darroch1,2,3, Emily F Smith4, Lyle L Nelson5
1Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN, USA.
Cambridge prisms. Extinction
|March 13, 2025
概括
关于晚期埃迪亚卡尔灭绝事件的辩论仍在继续. 最近的研究回顾了古生物学,地球化学和地球时间学数据,提出了灭绝脉冲的新模型.
科学领域:
- 古生物学的古生物学
- 地质化学 地质化学
- 地质时间学 (Geochronology)
背景情况:
- 晚期埃迪亚卡尔灭绝事件的存在受到争论,更多的关注是在埃迪亚卡尔-坎布里亚过渡期间全球变化的驱动因素.
- 了解这些事件对于理解罗纪生物圈的出现至关重要.
研究的目的:
- 综述研究埃迪亚卡晚期灭绝的历史,重点关注过去五年的古生物学,地球化学和地球时间学发现.
- 评估当前的知识状态,确定未解答的问题,并为研究环境和生物变化提出新的途径.
- 提出一个修订后的,对埃迪亚卡朗晚期灭绝脉冲的驱动因素的投机模型.
主要方法:
- 对最近的古生物学,地球化学和地球时间学研究进行了全面的文献综述.
- 分析历史观点和当前关于埃迪亚卡拉灭绝的科学共识.
- 对于灭绝驱动因素的新概念模型的开发.
主要成果:
- 确定了未来研究的关键挑战,包括准确计算灭绝强度,考虑到采样偏差和分类学分布.
- 强调需要进行严格的测试,以确定埃迪亚卡尔生物事件是否符合与法内罗纪事件相比的大规模灭绝的资格.
- 提出了对晚期埃迪卡伦灭绝脉冲的修订模型,为未来的研究提供了可测试的假设.
结论:
- 精确量化灭绝强度仍然是一个挑战,阻碍了与主要的Phanerozoic大规模灭绝直接比较.
- 一个修订后期埃迪亚卡尔灭绝驱动器的修订模型已经提出,为未来的研究提供了一个框架.
- 需要进一步的研究,以充分描述埃迪亚卡拉-坎布里亚过渡时期环境和生物变化的驱动因素.
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