The timing and effect of the earliest human arrivals in North America

doi:10.1038/s41586-020-2491-6

GSTDTAP > 地球科学

DOI	10.1038/s41586-020-2491-6
	The timing and effect of the earliest human arrivals in North America
	Lorena Becerra-Valdivia; Thomas Higham
	2020-07-22
发表期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
文章类型	Article;Early Access
语种	英语
国家	England; Australia
英文关键词	The peopling of the Americas marks a major expansion of humans across the planet. However, questions regarding the timing and mechanisms of this dispersal remain, and the previously accepted model (termed ' Clovis-first' )-suggesting that the first inhabitants of the Americas were linked with the Clovis tradition, a complex marked by distinctive fluted lithic points(1)-has been effectively refuted. Here we analyse chronometric data from 42 North American and Beringian archaeological sites using a Bayesian age modelling approach, and use the resulting chronological framework to elucidate spatiotemporal patterns of human dispersal. We then integrate these patterns with the available genetic and climatic evidence. The data obtained show that humans were probably present before, during and immediately after the Last Glacial Maximum (about 26.5-19 thousand years ago)(2,3)but that more widespread occupation began during a period of abrupt warming, Greenland Interstadial 1 (about 14.7-12.9 thousand years beforead 2000)(4). We also identify the near-synchronous commencement of Beringian, Clovis and Western Stemmed cultural traditions, and an overlap of each with the last dates for the appearance of 18 now-extinct faunal genera. Our analysis suggests that the widespread expansion of humans through North America was a key factor in the extinction of large terrestrial mammals. A Bayesian age model suggests that human dispersal to the Americas probably began before the Last Glacial Maximum, overlapping with the last dates of appearance for several faunal genera.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000551401000003
WOS关键词	CORDILLERAN ICE-SHEET ; RADIOCARBON CALIBRATION ; FREE CORRIDOR ; CORE RECORDS ; PLEISTOCENE ; AGE ; CLIMATE ; CLOVIS ; MARGIN ; COLONIZATION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/286767
专题	地球科学资源环境科学
推荐引用方式 GB/T 7714	Lorena Becerra-Valdivia,Thomas Higham. The timing and effect of the earliest human arrivals in North America[J]. NATURE,2020.
APA	Lorena Becerra-Valdivia,&Thomas Higham.(2020).The timing and effect of the earliest human arrivals in North America.NATURE.
MLA	Lorena Becerra-Valdivia,et al."The timing and effect of the earliest human arrivals in North America".NATURE (2020).