The role of hyperthermia in the end-Permian mass extinction

高温在二叠纪末大规模灭绝中的作用

• 批准号: 290190574
• 负责人: Privatdozent Dr. Dieter Korn
• 金额: --
• 依托单位: Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/290190574?language=en
• 关键词: role; hyperthermia; end; Permian; mass

Our aim is to understand the role of hyperthermia in the end-Permian mass extinction, the largest biotic catastrophe in the geological record. Despite its crucial importance for the evolution of life, the triggering mechanism for this event is still highly controversial. This extinction represents the most dramatic ancient example of a climate-driven biotic catastrophe because of its association with global warming. It may thus serve as a partial analogue for the long-term response of biodiversity to future anthropogenic climate change. Here we propose a research project, in which the consequences of warming-induced stresses during the end-Permian mass extinction and Early Triassic recovery will be investigated. We will use ostracods as model organisms and simultaneously investigate their evolutionary history and response to climate change, in particular the temperature increase seen at the Permian-Triassic boundary interval. The field sites in our investigation are in NW Iran (Julfa region), Central Iran (Abadeh region) and the Zagros Mountains (Esfahan region); these areas cover sections from open shelf and shallow-water settings. Our study will include isotope geochemistry (delta13C and delta18O analyses) on ostracod shells using SIMS technology and assemblage analyses (changes in taxonomic diversity, morphological disparity, degree of endemicity, changes in size and shape etc.).

我们的目标是了解高温在地质记录中最大的生物灾难——二叠纪末大灭绝中的作用。尽管它对生命的进化至关重要，但这一事件的触发机制仍然存在很大争议。由于与全球变暖有关，这次灭绝是古代气候驱动的生物灾难中最引人注目的例子。因此，它可以作为生物多样性对未来人为气候变化的长期反应的部分模拟。在此，我们提出了一个研究项目，该项目将研究在二叠纪末大灭绝和三叠纪早期恢复期间变暖引起的应力的后果。我们将使用介形类作为模式生物，同时研究它们的进化史和对气候变化的响应，特别是在二叠纪-三叠纪边界区间看到的温度升高。我们调查的现场地点在伊朗西北部（Julfa地区）、伊朗中部（Abadeh地区）和扎格罗斯山脉（Esfahan地区）；这些区域涵盖了开阔大陆架和浅水环境的部分。我们将利用SIMS技术对介形虫壳进行同位素地球化学（delta13C和delta18O分析）和组合分析（分类多样性变化、形态差异、特有程度、大小和形状变化等）。