Survivorship and recovery of early triassic tetrapods following the permo-triassic extinction event

二叠纪-三叠纪灭绝事件后早期三叠世四足动物的生存和恢复

• 批准号: 288126-2007
• 负责人: Modesto, Sean
• 金额: $ 2.21万
• 依托单位: Cape Breton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=480376
• 关键词: Survivorship; recovery; early; triassic; tetrapods

Of the five known mass extinction events, the Permo-Triassic extinction event is regarded unanimously as the most severe in Earth history. The consensus view has been that 70-90% of species became extinct 251 million years ago. Such estimates of high species mortality were based on ranks-based studies of low taxonomic resolution (family-level groups). My own investigations, using phylogenetic studies of higher resolution (species and genera), suggest that terrestrial vertebrates (tetrapods) experienced low extinction pressure during the Permo-Triassic extinction event.

在已知的五次大灭绝事件中，二叠纪-三叠纪灭绝事件被一致认为是地球历史上最严重的一次。普遍的观点是，70-90%的物种在2.51亿年前灭绝。这种高物种死亡率的估计是基于对低分类分辨率（科级群体）的基于等级的研究。我自己的调查，使用更高分辨率的系统发育研究（种和属），表明陆生脊椎动物（四足动物）在二叠纪-三叠纪灭绝事件中经历了低灭绝压力。