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

全球变暖和温度相关胁迫（TRS），特别是海水脱氧和酸化，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古代TRS事件及其对海洋生物群分类组成、生态特征和进化动态的影响，从而为生物对气候变化的长期响应提供了更好的预测框架。我建议在欧洲西南部选定的地质区域研究早陶瓦世（早侏罗世，距今约1.83亿年）变暖/灭绝事件。通过整合地球和生命科学不同学科的专业知识，我们将建立多个环境变量（特别是地球化学代理数据、沉积相）与多个大型底栖动物分类群（主要是双壳类和腕足类，共同代表了广泛的生态多样性的生活习惯、摄食模式、体型和流动性水平）之间的联系。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，氧合减少，酸化）作为生物变化驱动因素的相对作用。我们还将研究体型的减小是否是群落水平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，通过追踪早期托瓦西亚危机之前、期间和之后的环境和动物变化，我们将测试TRS的生态恢复模式是否遵循独立于TRS引起的生态退化的轨迹——这是在各种经历生态制度转变的现代系统中发现的一种模式。

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.