白垩纪-古近纪鲨鱼、孔鳐和鳐鱼大规模灭绝的全球影响和选择性，这一成果由法国蒙彼利埃大学
该研究组使用超过3200个化石和675个物种，在全球范围内量化了白垩纪末事件主题所导致的板鳃目动物(鲨鱼、孔鳐和鳐鱼)的物种形成、灭绝和生态变化。在白垩纪-古近纪界线处，板鳃目动物数量下降了62%以上，并在古新世没有完全恢复。白垩纪末期事件引发了一种异质物种灭绝模式，鳐鱼和硬食鱼物种达到了最高的灭绝水平(>72%)，鲨鱼和非硬食鱼物种受影响较小。地理范围大的分类单元和/或那些局限于高纬度环境的分类单元显示出更高的存活率。白垩纪-古近纪事件极大地改变了海洋生态系统的进化史。
研究人员表示，白垩纪-古近纪事件是最后一次大规模灭绝事件，但其对物种水平的海洋脊椎动物多样性的影响和长期影响在很大程度上仍未确定。
附：英文原文
Title: Global impact and selectivity of the Cretaceous-Paleogene mass extinction among sharks, skates, and rays
Author: Guillaume Guinot, Fabien L. Condamine
Issue&Volume: 2023-02-24
Abstract: The Cretaceous-Paleogene event was the last mass extinction event, yet its impact and long-term effects on species-level marine vertebrate diversity remain largely uncharacterized. We quantified elasmobranch (sharks, skates, and rays) speciation, extinction, and ecological change resulting from the end-Cretaceous event using >3200 fossil occurrences and 675 species spanning the Late Cretaceous–Paleocene interval at global scale. Elasmobranchs declined by >62% at the Cretaceous-Paleogene boundary and did not fully recover in the Paleocene. The end-Cretaceous event triggered a heterogeneous pattern of extinction, with rays and durophagous species reaching the highest levels of extinction (>72%) and sharks and nondurophagous species being less affected. Taxa with large geographic ranges and/or those restricted to high-latitude settings show higher survival. The Cretaceous-Paleogene event drastically altered the evolutionary history of marine ecosystems.
DOI: abn2080
Source: https://www.science.org/doi/10.1126/science.abn2080