CAREER: Environmental Forcing on the Resilience of Carbonate Platforms During the Early Cretaceous Super Greenhouse Period

职业生涯：早白垩世超级温室时期环境强迫对碳酸盐台地的恢复力

• 批准号: 1847885
• 负责人: Alexis Godet
• 金额: $ 55.05万
• 依托单位: University of Texas at San Antonio
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1847885&HistoricalAwards=false
• 关键词: CAREER; Environmental; Forcing; Resilience; Carbonate

Shallow marine reef systems support a highly diversified community. Yet, approximately 75% of these carbonate-producing systems are threatened by ongoing warming and increased human activity. Investigating the Earth's history can increase understanding of these vulnerable systems and provide opportunities for identifying mitigation processes. About 120 million years ago, the atmospheric content of greenhouse gases increased dramatically. Under such conditions, shallow marine carbonate-producing ecosystems either survived, adapted, or disappeared. This proposal will test the hypothesis that the resilience of carbonate-producing ecosystems was favored at low latitudes by examining four locations at different latitudes, from the ancient equator to the subtropics. This project will include research opportunities for underrepresented minority students recruited from a local community college. The students will participate in a summer internship program that includes a multitiered mentoring approach and is designed to increase interest in geoscience and retention in the major. Students will have the opportunity to publish their research and serve as role models for other minority students.This project will link the adaptation of ecosystems to environmental deteriorations associated with the Oceanic Anoxic Event (OAE) 1a, by investigating carbonate platforms preserved in France, Italy, and Oman. These areas were located at different latitudes during the OAE1a and experienced diverse climate and weathering conditions. Carbonate platforms either disappeared at high paleolatitudes or transitioned into microbial communities in subequatorial settings. Determining parameters that favor the resilience of these ecosystems requires the identification of the perturbations in the carbon cycle and in the fossil assemblage associated with the OAE1a, and the appraisal of associated environmental stresses using geochemical proxies. Achieving these tasks will deepen the knowledge on feedback mechanisms between the environment and carbonate production, quantify thermal and nutrient latitudinal gradients under super greenhouse conditions, and improve the understanding of the resilience of ecosystems during a period of global paleoceanographic perturbation that could serve to mitigate the demise of modern reef systems.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

浅海珊瑚礁系统支持高度多样化的社区。然而，大约75%的碳酸盐生产系统受到持续变暖和人类活动增加的威胁。调查地球的历史可以增加对这些脆弱系统的了解，并为确定减缓进程提供机会。大约1.2亿年前，大气中温室气体的含量急剧增加。在这种条件下，浅海碳酸盐生产生态系统要么生存，适应，要么消失。该提案将通过检查从古代赤道到亚热带的不同纬度的四个地点来检验碳酸盐生产生态系统的弹性在低纬度地区受到青睐的假设。该项目将包括为从当地社区学院招募的代表性不足的少数民族学生提供研究机会。学生将参加暑期实习计划，其中包括一个多层次的指导方法，旨在提高地球科学的兴趣和保留在主要。 学生们将有机会发表他们的研究成果，并成为其他少数民族学生的榜样。本项目将通过调查法国、意大利和阿曼保存的碳酸盐台地，将生态系统的适应与海洋缺氧事件（OAE）1a相关的环境恶化联系起来。这些地区在OAE1a期间位于不同的纬度，经历了不同的气候和风化条件。碳酸盐台地要么在高古纬度消失，要么在亚赤道环境中过渡到微生物群落。确定有利于这些生态系统的恢复力的参数，需要识别的扰动碳循环和与OAE1a相关的化石组合，并使用地球化学代理评估相关的环境应力。实现这些任务将加深对环境和碳酸盐生产之间反馈机制的了解，量化超级温室条件下的热量和养分纬度梯度，并提高对全球古海洋学扰动时期生态系统恢复力的理解，这可能有助于减轻现代珊瑚礁系统的消亡。该奖项反映了NSF的法定使命，并被认为值得支持通过使用基金会的知识价值和更广泛的影响审查标准进行评估。

项目成果

THE RESILIENCE OF A NORTHERN TETHYAN CARBONATE PLATFORM DURING THE OAE1A: GEOCHEMICAL INSIGHTS FROM THE CORBIÈRES REGION OF FRANCE

OAE1A 期间北特提斯碳酸盐台地的恢复能力：来自法国科尔比雷斯地区的地球化学见解

• DOI: 10.1130/abs/2022am-378762
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Sansing, Alexis;Godet, Alexis;Godet, Alexis;Sharpe, Justin;Sharpe, Justin;Lacroix, Brice;Lacroix, Brice
• 通讯作者: Lacroix, Brice

THE DEMISE OF A SUBTROPICAL CARBONATE PLATFORM DURING APTIAN SUPER GREENHOUSE TIMES

APTIAN 超级温室时期亚热带碳酸盐台地的消亡

• DOI: 10.1130/abs/2022am-378728
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Godet, Alexis;Byerly, Jacob;Bourdon, Matthew;Arnaud-Vanneau, Annie;Suarez, Marina B.;Adatte, Thierry
• 通讯作者: Adatte, Thierry

THE RESPONSE OF CORBIÈRES CARBONATE PLATFORM TO EARLY CRETACEOUS SUPER GREENHOUSE CONDITIONS

科比雷斯碳酸盐台地对早白垩世超级温室条件的响应

• DOI: 10.1130/abs/2022am-382672
• 发表时间: 2022
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Sharpe, Justin;Sansing, Alexis;Suarez, Marina;Godet, Alexis
• 通讯作者: Godet, Alexis

THE IMPACT OF APTIAN SUPER GREENHOUSE CONDITIONS ON THE URGONIAN SUBTROPICAL CARBONATE PLATFORM

APTIAN超级温室条件对Urgonian亚热带碳酸盐台地的影响

• DOI: 10.1130/abs/2021am-368154
• 发表时间: 2021
• 期刊: Geological Society of America Abstracts with Programs
• 作者: Bourdon, Matthew;Byerly, Jacob;Arnaud-Vanneau, Annie;Suarez, Marina B.;Adatte, Thierry;Godet, Alexis
• 通讯作者: Godet, Alexis