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.).

我们的目的是了解热疗在最终的页志灭绝中的作用，这是地质记录中最大的生物灾难。尽管对生命的进化至关重要，但此事件的触发机制仍然引起极大争议。这种灭绝代表了气候驱动的生物灾难的最戏剧性的古老例子，因为它与全球变暖相关。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类似物。在这里，我们提出了一个研究项目，其中将研究在最终的哥伦比亚质量灭绝和早期三叠纪恢复期间变暖引起的压力的后果。我们将使用ostracods作为模型生物，同时研究其进化史和对气候变化的反应，特别是在二叠纪三叠纪边界间隔下看到的温度升高。我们调查的现场位于伊朗西北（朱尔法地区），伊朗中部（阿巴德地区）和扎格罗斯山脉（Esfahan地区）；这些区域涵盖了开放式货架和浅水环境的部分。我们的研究将包括使用SIMS技术和组合分析（分类学多样性，形态学差异，地方性的变化，地方性的变化，大小和形状的变化）对Ostracod壳进行的同位素地球化学（Delta13c和Delta18O分析）。