Late Quaternary dynamics of marine paleoenvironments and ecosystems in the Gulf of Corinth (eastern Mediterranean)

科林斯湾（东地中海）海洋古环境和生态系统的晚第四纪动态

• 批准号: 467434246
• 负责人: Professor Dr. Patrick Grunert
• 金额: --
• 依托单位: Institut für Geologie und Mineralogie
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/467434246?language=en
• 关键词: Late; Quaternary; dynamics; marine; paleoenvironments

The Mediterranean has been identified as a hot spot region of climatechange. Rising water temperatures and increasing seawater acidification threaten marine ecosystem functioning with potentially dramatic repercussions for the livelihood of coastal populations. The sedimentary record of interglacial periods offers unique opportunities to study climate forcing and its feedback with marine and terrestrial ecosystems on suborbital time scales. Only paleoclimatic and paleoecological data from well-distributed sites are able to capture the full extent temporal and spatial complexity of climate forcing over the Mediterranean region, necessary to inform model projections and mitigation strategies in a meaningful way. The herein presented proposal aims to study the drivers of suborbital variability in marine paleoenvironments and ecosystems in the Gulf of Corinth basin (eastern Mediterranean, IODP Site M0080) during interglacial periodsMIS 1 and MIS 5. Centennial-scale multi-proxy records will (i) constrain the timing, nature, and amplitude of paleoenvironmental variability; (ii) indentify the drivers of paleoenvironmental variability (forcing by high and low latitude climatic signals; local factors such as anthropogenic deforestation); (iii) explore successional dynamics ofplanktic and benthic foraminifera as a key group of the local ecosystem; and (iv) determine lead/lag relationships between the response of terrestrial and marine ecosystems to identified drivers controlling the depositional environment. The expected results will provide new insights into high and low latitude climatic forcing in theEastern Mediterranean and their significance for basin evolution, major research goals of IODP Expedition 381. At the same time, the project adds long-term paleoecological data sets to ongoing efforts in global change ecology towards generalized models of successional trajectories.

地中海已被确定为气候变化的热点地区。水温上升和海水酸化加剧威胁着海洋生态系统的功能，可能对沿海人口的生计产生巨大影响。间冰期的沉积记录为研究气候强迫及其对亚轨道时间尺度上海洋和陆地生态系统的反馈提供了独特的机会。只有来自分布良好的站点的古气候和古生态数据才能够捕获地中海地区气候强迫的全部时空复杂性，这对于以有意义的方式为模型预测和减缓战略提供信息是必要的。本文提出的建议旨在研究科林斯湾盆地（东地中海，IODP站点M0080）在间冰期MIS 1和MIS 5期间海洋古环境和生态系统亚轨道变化的驱动因素。百年尺度的多代理记录将（i）限制古环境变化的时间、性质和幅度;（ii）识别古环境变化的驱动因素（高纬度和低纬度气候信号的强迫;人为砍伐森林等当地因素）;（iii）探讨作为当地生态系统关键群体的浮游有孔虫和底栖有孔虫的演替动态;以及（iv）确定陆地和海洋生态系统对已确定的控制沉积环境的驱动因素的反应之间的超前/滞后关系。预期的结果将提供新的见解高，低纬度气候强迫在东地中海和盆地演变的意义，IODP远征381的主要研究目标。与此同时，该项目将长期的古生态数据集加入到全球变化生态学的持续努力中，以建立演替轨迹的通用模型。