COM.on C.A.3:e8/72-76     Online published on May 17, 2009.
doi:10.4236/coca.2009.31008
FOCUS
Discussion on the Reported Time for Modern Humans Conquered the Americas

YANG Jingmin, ZHU Dongchen

MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433 China


ABSTRACT: The time for modern human entered the Americas was estimated by various fields including archaeology, geography, paleo-ecology, and molecular genetics. Here some simple analyses were performed on the time reported by many papers in these fields, indicating that there have been two waves for the peopling of the Americas, approximately 35,500-22,000 and 18,000-13,000 years ago. The early migrants to Siberia diffused to the Bering area which was above the sea level at that time, and expanded into the Americas subsequently. During 22,000 through 18,000 years ago, the Last Glacial Maximum stopped the early migrant into the Americas until its end stimulated the migrants entered the Americas rapidly for the second wave 18,000 to 13,000 years ago.

Key words: American Indians; Immigration; Last Glacial Maximum; Molecular genetics

Recieved: Apr.16, 2009   Accepted: May. 15,2009  Corresponding: yangjm210@gmail.com


《现代人类学通讯》第三卷e8篇 第72-76页  2009年5月17日网上发行

动态评论

人类征服美洲时间的多角度探讨

杨敬敏, 朱东臣

复旦大学现代人类学教育部重点实验室,上海 200433

 

 

摘要:本文综合考古学、地理学、古生态学、分子遗传学等方面的研究成果对人类最早进入美洲的时间进行探讨,并通过对文献中提及的迁移时间进行简单的统计分析。我们认为早期人类在征服美洲时有经历了两次高峰期,一次是在3.55到2.2万年前,另一次是在1.8到1.3万年前。人类在进入西伯利亚后,继续扩张进入当时曾是陆地的白令地区,在白令地区发展壮大并进入美洲大陆;但在2.2到1.8万年前,由于最后一次盛冰期的到来,人类向美洲的迁移受到影响。随着盛冰期的结束,白令地区通向美洲大陆的通道重新打通,大约1.8到1.3万年前,人类再次快速向美洲扩张。

关键词美洲印第安人;迁徙;盛冰期;分子遗传学

收稿日期:2009年4月16日  修回日期:2009年5月15日 联系人:杨敬敏 yangjm210@gmail.com


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