RUI: Pattern of Extinction and Replacement at the Lower- Middle Cambrian Boundary Event in the Great Basin, Western U.S.

RUI：美国西部大盆地中下寒武统边界事件的灭绝和更替模式

• 批准号: 9218892
• 负责人: Linda McCollum
• 金额: $ 4.93万
• 依托单位: Eastern Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218892&HistoricalAwards=false
• 关键词: RUI; Pattern; Extinction; Replacement; Lower

Extinction, which may be the ultimate fate of all species, has always held a special interest for geologists and biologists, and even legislators (e.g., Endangered Species Act). Extinction events, when a number of species become extinct over a geologically short period time, have always had historical significance to Earth scientists and evolutionary biologists, as they are conveniently used to divide up geologic time. In this project, PI and students will examine in detail one of the earliest extinction events, at the Lower-Middle Cambrian boundary, and help answer questions such as how sudden the event really was, what percentage of the fauna went extinct, and whether species began to decline in numbers prior to their extinction. The paleoenvironment in which these early taxa lived will also be reconstructed from the type of rock that now entombs them.

灭绝可能是所有物种的最终命运，一直受到地质学家和生物学家甚至立法者（例如《濒危物种法》）的特别关注。 灭绝事件，即许多物种在短时间内灭绝，对地球科学家和进化生物学家来说一直具有历史意义，因为它们可以方便地用来划分地质时间。 在这个项目中，PI和学生将详细研究寒武纪中下寒武纪边界最早的灭绝事件之一，并帮助回答诸如该事件到底有多突然、动物群灭绝的百分比以及物种是否灭绝等问题。在灭绝之前数量就开始下降。 这些早期类群生活的古环境也将从现在埋藏它们的岩石类型中重建。