与三叠纪-侏罗纪边界大规模灭绝相关的突然生产力崩溃。

Sudden productivity collapse associated with the Triassic-Jurassic boundary mass extinction.

作者信息

Ward P D, Haggart J W, Carter E S, Wilbur D, Tipper H W, Evans T

机构信息

Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, USA.

出版信息

Science. 2001 May 11;292(5519):1148-51. doi: 10.1126/science.1058574.

DOI:10.1126/science.1058574

PMID:11349146

Abstract

The end-Triassic mass extinction is one of the five most catastrophic in Phanerozoic Earth history. Here we report carbon isotope evidence of a pronounced productivity collapse at the boundary, coincident with a sudden extinction among marine plankton, from stratigraphic sections on the Queen Charlotte Islands, British Columbia, Canada. This signal is similar to (though smaller than) the carbon isotope excursions associated with the Permian-Triassic and Cretaceous-Tertiary events.

摘要

三叠纪末大灭绝是显生宙地球历史上五次最具灾难性的事件之一。在此，我们报告了来自加拿大不列颠哥伦比亚省夏洛特皇后群岛地层剖面的碳同位素证据，表明在该边界处生产力出现显著崩溃，同时海洋浮游生物突然灭绝。这一信号与二叠纪 - 三叠纪和白垩纪 - 古近纪事件相关的碳同位素偏移相似（尽管幅度较小）。