Synchronous extinction of North America's Pleistocene mammals

被引：106

作者：

Faith, J. Tyler ^{[1
]}

Surovell, Todd A. ^{[2
]}

机构：

[1] George Washington Univ, Dept Anthropol, Ctr Adv Study Human Paleobiol, Hominid Paleobiol Doctoral Program, Washington, DC 20052 USA

[2] Univ Wyoming, Dept Anthropol, Laramie, WY 82071 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2009年 / 106卷 / 49期

关键词：

climate change; extraterrestrial impact; overkill; Quaternary extinctions; radiocarbon dates; CLOVIS; CHRONOLOGY; AGE;

D O I：

10.1073/pnas.0908153106

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The late Pleistocene witnessed the extinction of 35 genera of North American mammals. The last appearance dates of 16 of these genera securely fall between 12,000 and 10,000 radiocarbon years ago (approximate to 13,800-11,400 calendar years B. P.), although whether the absence of fossil occurrences for the remaining 19 genera from this time interval is the result of sampling error or temporally staggered extinctions is unclear. Analysis of the chronology of extinctions suggests that sampling error can explain the absence of terminal Pleistocene last appearance dates for the remaining 19 genera. The extinction chronology of North American Pleistocene mammals therefore can be characterized as a synchronous event that took place 12,000-10,000 radiocarbon years B. P. Results favor an extinction mechanism that is capable of wiping out up to 35 genera across a continent in a geologic instant.

引用

页码：20641 / 20645

页数：5

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