Planktic Evolution, Carbon Fluxes, and Ecologic Recovery from the Cretaceous-Paleogene Mass Extinction

浮游进化、碳通量和白垩纪-古近纪大规模灭绝的生态恢复

• 批准号: 9814790
• 负责人: Steven D'Hondt
• 金额: $ 22万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2004-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814790&HistoricalAwards=false
• 关键词: Planktic; Evolution; Carbon; Fluxes; Ecologic

9814790D'HondtThe Cretaceous/Paleogene (K/Pg) mass extinction was the youngest of the five largest known extinction events. Because it occurred only 65 million years ago, records of this event are much more common and generally much less altered than records of the other four great mass extinctions. Consequently, the K/Pg event provides an unparalleled opportunity for documenting how global ecosystems recovered from one of the most biologically devastating catastrophes ever identified. We propose to take advantage of that opportunity by using K/Pg geochemical and paleontologic records to test fundamental hypotheses of marine biological recovery from mass extinctions. In particular, we propose to test (1) whether the geologic record supports the hypothesis that planktic evolution was a necessary precondition for the recovery of organic fluxes to deep water (or vice versa), and (2) whether post-extinction records of marine plankton are consistent with a low-productivity Strangelove-ocean model or an altered-ecosystem normal-productivity model of ecologic recovery from the K/Pg mass extinction.

9814790d'hondtthe the白垩纪/古生元（K/PG）质量灭绝是五个已知灭绝事件中最小的一个。 由于它仅在6500万年前发生，因此该事件的记录比其他四个巨大灭绝的记录更为普遍，而且通常更改的记录要少得多。因此，K/PG事件提供了一个无与伦比的机会，可以记录如何从有史以来最毁灭性的灾难之一中恢复的全球生态系统。 我们建议通过使用K/PG地球化学和古生物学记录来利用这一机会来检验大量灭绝的海洋生物恢复的基本假设。 特别是，我们建议测试（1）地质记录是否支持浮游物质进化是恢复有机通量到深水（或反之亦然）的必要前提，以及（2）海洋后期的爆发记录是否浮游生物与低生产率的strangelove-opean模型或从k/pg质量灭绝的生态恢复的变化生态系统的正常生产率模型一致。