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灭绝期间的环境扰动：全球与局部信号jessica Whiteside，布朗大学roger Summons，麻省理工学院，earr - 1147405摘要本研究旨在通过比较大洋中部和更受限制的海相裂谷盆地的脂质生物标志物和总体碳同位素记录，确定三叠纪末大灭绝期间环境扰动的性质。这次灭绝发生在20150万年前，是地球历史上“五大”物种大灭绝之一，与二氧化碳的多次大规模增加和全球变暖有关，这与大量中大西洋岩浆省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泛海相玄武岩高原）的研究，并将其与英国受限制的海洋盆地较浅部分的记录进行对比，这些记录主导了关于大灭绝的讨论。这一提出的分析对于理解地球历史上的这一特殊时刻至关重要，并且通过弥补利用分类学和环境诊断化合物来测试有关环境变化和灭绝机制的特定假设的研究缺乏，揭示灭绝事件的具体因果机制。为了支持来自代表性不足群体的新兴科学家，该提案将支持一名来自第50学区（包括夏洛特女王群岛）的高中暑期实习生协助实验室工作并磨练地质技能。此外，pi将共同领导第50学区10年级学生的暑期实地考察，我们的发现将被纳入2年级、4年级、7年级和10年级的科学课程和教育计划，向数百名学生展示科学，这些学生主要来自（65%）海达族和其他第一民族部落，这些群体在科学领域的代表性非常低。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机构所在学校的K-12教育推广计划，该计划将有多名本科生和研究生参与。

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.