Uncovering the long term sensitivity of Southern Ocean phytoplankton to Antarctic climate change, using novel geochemical and ancient DNA proxies

利用新型地球化学和古代 DNA 代理揭示南大洋浮游植物对南极气候变化的长期敏感性

• 批准号: 2578968
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2578968
• 关键词: Uncovering; long; term; sensitivity; Southern

The Antarctic is changing. Delicate ecosystems, from marine mammals and birds, to the phytoplankton at the base of the food web, are under threat from both global warming and human activities such as fishing and whaling.BackgroundThe goal of this project is to better understand how Antarctic phytoplankton will react and adapt to future changes, by examining changes in the past.The early Holocene is characterised by warming comparable to future 21st century projections, and the Holocene/Anthropocene transition experienced severe environmental disturbance from climate change and fishing during the acceleration of industrialisation. However, there are no fossil records from many of the main phytoplankton groups with which to examine their past sensitivity.In this project the student will reconstruct past phytoplankton changes in the Southern Ocean, and the offshore Antarctic Peninsula, with diatom micropalaeontology and sedimentary ancient DNA - a new technique recently developed for non-fossilising groups.The student will also use geochemistry to date the core material, and reconstruct environmental change.Research focusThe aims of this project are to provide the first records of past changes to Antarctic phytoplankton from species that do not produce a fossil record. Sediment core palaeo-proxies for stable isotopes and micropalaeontology will aid in constraining our reconstructions of past marine environments, with which to build a new understanding of the main causes of phytoplankton change both in the past and into the future.The student will have opportunities to be involved in the design of the project, particularly with respect to the existing skills and interest in marine, earth and biological sciences. A range of palaeo-proxies are available including but not limited to ancient DNA, isotope geochemistry, and micropalaeontology.

南极正在改变。从海上食​​品网络底部的浮游植物到浮游植物的微妙生态系统都受到全球变暖和人类活动（例如捕鱼和捕鲸）的威胁。backbackground。该项目的目标是更好地了解南极浮游植物的反应和适应以后的变化，并通过在未来的变化中进行反应。全新世/人类世过渡在工业化加速期间因气候变化和捕鱼而严重的环境干扰。但是，没有许多主要浮游植物群的化石记录可以检查其过去的敏感性。在这个项目中，学生将重建过去的浮游植物浮游植物的变化，南极半岛，近海半岛，以及diotom micropalaeytology and Setimentary DNA的新技术，以及新的材料，以供新的材料组成，并将其用于非遗产，并将其用于非遗产，并将其供应，并将其供应到近期，并将其供应。重建环境变化。研究重点该项目的目的是从不产生化石记录的物种中提供对南极浮游植物的过去变化的第一批记录。 Sediment core palaeo-proxies for stable isotopes and micropalaeontology will aid in constraining our reconstructions of past marine environments, with which to build a new understanding of the main causes of phytoplankton change both in the past and into the future.The student will have opportunities to be involved in the design of the project, particularly with respect to the existing skills and interest in marine, earth and biological sciences.可提供一系列古代毒素，包括但不限于古代DNA，同位素地球化学和微层科。