Causes and consequences of end-Ediacaran extinction – an update
Causes and consequences of end-Ediacaran extinction – an update
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DOI：
10.1017/ext.2023.12
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
S. Darroch;E. F. Smith;L. Nelson;M. Craffey;J. Schiffbauer;M. Laflamme
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文献类型：
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作者：
S. Darroch;E. F. Smith;L. Nelson;M. Craffey;J. Schiffbauer;M. Laflamme
自20世纪80年代以来，埃迪卡拉纪晚期是否存在一次或多次灭绝事件一直是争论的焦点。在过去十年中，随着人们努力了解埃迪卡拉纪 - 寒武纪过渡时期全球变化的驱动因素以及更具现代面貌的显生宙生物圈的出现，围绕这些事件的讨论愈发激烈。在本文中，我们回顾了有关埃迪卡拉纪晚期灭绝的思想和研究历史，特别关注了过去5年的古生物学、地球化学和地质年代学研究。我们思考了关键问题在多大程度上得到了解答，并提出了新的问题，这些问题将有助于确定环境和生物变化的驱动因素。未来研究的一个关键挑战将是计算考虑到有限采样、埃迪卡拉纪“组合”带的持续时间以及局限于单个“组合”的分类群优势的灭绝强度；没有这些数据，埃迪卡拉纪生物事件在多大程度上代表与显生宙“五次大灭绝”相当的真正大规模灭绝仍有待严格检验。最后，我们基于近期研究提出了一个修订后的埃迪卡拉纪晚期灭绝脉冲驱动因素模型。
Since the 1980s, the existence of one or more extinction events in the late Ediacaran has been the subject of debate. Discussion surrounding these events has intensified in the last decade, in concert with efforts to understand drivers of global change over the Ediacaran – Cambrian transition and the appearance of the more modern-looking Phanerozoic biosphere. In this paper we review the history of thought and work surrounding late Ediacaran extinctions, with a particular focus on the last 5 years of paleontological, geochemical, and geochronological research. We consider the extent to which key questions have been answered, and pose new questions which will help to characterize drivers of environmental and biotic change. A key challenge for future work will be the calculation of extinction intensities that account for limited sampling, the duration ofEdiacaran ‘ assemblage ’ zones, and the preponderance oftaxa restricted to a single ‘ assemblage ’ ; without these data, the extent to which Ediacaran bioevents represent genuine mass extinctions comparable to the ‘ Big 5 ’ extinctions of the Phanerozoic remains to be rigorously tested. Lastly, we propose a revised model for drivers of late Ediacaran extinction pulses that builds off recent