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Response of Early Jurassic (Pliensbachian-Toarcian) benthic marine faunas from south-western Europe to temperature-related stresses (EvoBiv)

欧洲西南部早侏罗世（Pliensbachian-Toarcian）底栖海洋动物群对温度相关应力的响应（EvoBiv）

基本信息

批准号：
290189833
负责人：
Privatdozent Dr. Martin Aberhan
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/290189833?language=en
关键词：
Response Early Jurassic Pliensbachian Toarcian

项目摘要

Global warming and temperature-related stresses (TRS), in particular deoxygenation and acidification of seawater, have raised concerns over the degradation and transformation of modern marine ecosystems. The geological and fossil record conserves ancient episodes of TRS and their effects on the taxonomic composition, ecological characteristics, and evolutionary dynamics of the marine biota, thus providing the opportunity to develop better predictive frameworks for long-term biotic response to climate change. I propose to study the early Toarcian (early Jurassic, ca. 183 million years before present) warming/extinction event in selected geological sections of south-western Europe. By integrating expertise across diverse disciplines in earth and life sciences we will establish links between multiple environmental variables (notably geochemical proxy data, sedimentary facies) and the quantitative occurrences of multiple macrobenthic taxa (mainly bivalves and brachiopods, jointly representing a broad ecological variety of life habits, feeding modes, body size, and mobility levels). Applying physiological principles as the bridging concept we expect to identify and understand the relative role of particular environmental factors (extreme temperatures, reduced oxygenation, acidification) as drivers of biotic change. We will also investigate whether decreases in body size were an early indicator of imminent change at the community level, and whether large-sized species were preferentially affected by TRS. Finally, by tracking the environmental and faunal change leading up to, across, and following the early Toarcian crisis, we will test whether the pattern of ecological recovery from TRS follows a trajectory independent from that of TRS-induced ecological degradation - a pattern found in various modern systems experiencing ecological regime shifts.

全球变暖和与温度有关的压力，特别是海水的脱氧和酸化，引起了人们对现代海洋生态系统退化和转变的关注。地质和化石记录保存了TRS的古代事件及其对海洋生物群分类组成、生态特征和进化动力学的影响，从而为开发更好的长期生物响应气候变化的预测框架提供了机会。我建议研究欧洲西南部选定地质剖面中的托阿尔西世早期(早侏罗世，距今约1.83亿年)的变暖/灭绝事件。通过整合不同学科在地球和生命科学方面的专业知识，我们将在多种环境变量(特别是地球化学替代数据、沉积相)和多种大型底栖动物类群(主要是双壳类和腕足类，共同代表广泛的生态多样性的生活习性、摄食模式、身体大小和活动水平)之间建立联系。应用生理学原理作为桥梁概念，我们期望识别和理解特定环境因素(极端温度、氧气减少、酸化)作为生物变化驱动因素的相对作用。我们还将调查体型的减少是否是群落层面即将发生变化的早期指标，以及大型物种是否优先受到TRS的影响。最后，通过跟踪导致、跨越和之后早期托尔西亚危机的环境和动物变化，我们将测试TRS的生态恢复模式是否遵循独立于TRS导致的生态退化的轨迹--这种模式存在于经历生态制度转变的各种现代系统中。