Collaborative Research: Using molecular fossils to investigate environmental perturbation during the end-Triassic Mass Extinction: Global vs. local signals

合作研究：利用分子化石研究三叠纪末大规模灭绝期间的环境扰动：全球信号与局部信号

• 批准号: 1147402
• 负责人: L. Peter Gromet
• 金额: $ 12.73万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1147402&HistoricalAwards=false
• 关键词: Collaborative; Research; Using; molecular; fossils

Collaborative Research: Using molecular fossils to investigate environmental perturbation during the end-Triassic Mass Extinction: Global vs. local signalsJessica Whiteside, Brown University, EAR-1147402Roger Summons, MIT, EAR-1147685ABSTRACTThis proposal aims to determine the nature of the environmental perturbation at the end-Triassic mass extinction by comparing lipid biomarker and bulk carbon isotopic records from mid-ocean and more restricted marine rift basins. This extinction, at 201.5 million years ago, is one of the "big five" mass extinctions in Earth history, and is associated with multiple, massive increases in CO2 and global warming linked with eruptive pulses of the voluminous Central Atlantic Magmatic Province basalts. PIs' study will be the first to examine in detail a mid-ocean record (Panthalassic basaltic plateau of the Queen Charlotte Islands, Canada) and contrast that with records from shallower sections in restricted marine basins in the United Kingdom that have dominated the discussions of the mass extinction. This proposed analysis is of critical importance for understanding this singular moment in Earth history, as well as unraveling the specific cause and effect mechanisms of extinction events in general, by remedying the dearth of studies that utilize taxonomically and environmentally diagnostic compounds that can test specific hypotheses regarding environmental change and extinction mechanisms. In an effort to support emerging scientists from underrepresented groups, this proposal will support one high school summer intern from School District 50 (encompassing the Queen Charlotte archipelago) to assist with lab work and hone geologic skills. Furthermore, PIs will co-lead a summer field trip for tenth grade students of School District 50, and their discoveries will be incorporated into the science curricula and educational programs for 2nd, 4th, 7th, and 10th grades, exposing science to hundreds of students belonging predominantly (65%) to the Haida Nation and other First Nations tribes, highly underrepresented groups in the sciences. New research will be incorporated into the curricula of Brown University and MIT and will be incorporated into K-12 educational outreach programs at schools local to PI institutions, in which multiple undergraduate and graduate students participate.

合作研究：使用分子化石研究三叠纪末期大灭绝期间的环境扰动：全球信号与本地信号杰西卡·怀特塞德，布朗大学，麻省理工学院，本研究旨在通过比较三叠纪中期以来的脂类生物标志物和碳同位素记录，确定三叠纪末期生物大灭绝的环境扰动性质。海洋和更有限的海洋裂谷盆地。这次灭绝发生在2.015亿年前，是地球历史上的“五大”大规模灭绝之一，与二氧化碳的多次大规模增加和全球变暖有关，这些都与大量的中大西洋岩浆区玄武岩的喷发脉冲有关。PI的研究将是第一个详细检查海洋中部记录（加拿大夏洛特女王群岛的Panthalassic玄武岩高原）的研究，并将其与英国限制海洋盆地中较浅部分的记录进行对比，这些记录主导了大规模灭绝的讨论。这项拟议的分析对于理解地球历史上的这一独特时刻至关重要，并通过弥补利用分类学和环境诊断化合物的研究的缺乏来揭示灭绝事件的具体因果机制，这些化合物可以测试有关环境变化和灭绝机制的特定假设。 为了支持来自代表性不足群体的新兴科学家，该提案将支持50学区（包括夏洛特女王群岛）的一名高中暑期实习生，以协助实验室工作和磨练地质技能。此外，PI将共同领导一个夏季实地考察的学区50的十年级学生，他们的发现将被纳入科学课程和教育计划的第二，第四，第七和第十年级，暴露科学数百名学生主要属于（65%）海达民族和其他第一民族部落，在科学中代表性极低的群体。新的研究将被纳入布朗大学和麻省理工学院的课程，并将被纳入当地学校的K-12教育推广计划PI机构，其中多名本科生和研究生参与。