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

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：全球与局部信号布朗大学杰西卡·怀特赛德，EAR-1147402罗杰·萨蒙斯，麻省理工学院，EAR-1147685本文旨在通过比较来自大洋中部和更受限的海洋裂谷盆地的脂类生物标记物和大量碳同位素记录，确定三叠纪末期大灭绝期间环境扰动的性质。这次大灭绝发生在2.015亿年前，是地球历史上五大大灭绝之一，与二氧化碳的多次大规模增加和全球变暖有关，与中大西洋岩浆省玄武岩的喷发脉冲有关。PIS研究将首次详细研究大洋中部的记录(加拿大夏洛特女王群岛的泛海玄武岩高原)，并将其与英国受限海洋盆地的浅水部分的记录进行对比，这些记录一直主导着大灭绝的讨论。这项拟议的分析对于理解地球历史上的这一独特时刻以及通过弥补缺乏利用分类学和环境诊断化合物来检验关于环境变化和灭绝机制的特定假说的研究的缺乏，对于了解地球历史上这一独特的时刻以及揭开灭绝事件的具体因果机制至关重要。为了支持来自代表性不足群体的新兴科学家，这项提议将支持来自第50学区(包括夏洛特女王群岛)的一名高中暑期实习生协助实验室工作和磨练地质技能。此外，PI将共同领导第50学区十年级学生的暑期实地考察活动，我们的发现将被纳入二年级、四年级、七年级和十年级的科学课程和教育计划，向数百名主要属于海达族(65%)和其他第一民族部落的学生展示科学，这些学生在科学界的代表性很低。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PI机构当地学校的K-12教育推广计划，多名本科生和研究生参与其中。

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 our 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.