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Ice Age climate change did not pose significant challenges to first Americans, study suggests

Date:
April 14, 2010
Source:
Springer Science+Business Media
Summary:
Paleoindian groups occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups. Two researchers suggest otherwise in their review of climatic and environmental records from this time period in continental North America.
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Paleoindian groups -- the first people to enter and subsequently inhabit the American continent during the final glacial episodes of the Pleistocene period -- occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups.

David Meltzer from the Southern Methodist University in Dallas, USA, and Vance Holliday from the University of Arizona in Tucson, USA, suggest otherwise in their review of climatic and environmental records from this time period in continental North America, published in Springer's Journal of World Prehistory.

From their analysis, they conclude that on the Great Plains and in the Rocky Mountains, conditions were in reality less extreme and therefore may not have measurably added to the challenge routinely faced by Paleoindian groups, who during this interval, successfully dispersed across the diverse habitats of Late Glacial North America.

Meltzer and Holliday question whether the impact of cooling on Pleistocene North Americans was actually that pronounced or widespread and, if it was, whether it was similarly abrupt and severe, and in the same direction, across North America. Their comprehensive review of the climate and environment of North America during that time and its possible impact suggests that the Young Dryas age cooling was not as sudden, extensive, or severe as has previously been suggested and the notion that these conditions may have taken the Paleoindians by surprise is questionable.

The authors conclude: "All things considered, it is likely that across most of North America, south of the retreating ice sheets, Paleoindians were not constantly scrambling to keep up with Younger Dryas age climate changes. After all, adapting to changing climatic and environmental conditions was nothing new to them -- it was what they did."



Story Source:

The above post is reprinted from materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Journal Reference:

  1. Meltzer DJ, Holliday VT. Would North American Paleoindians have Noticed Younger Dryas Age Climate Changes? Journal of World Prehistory, 2010; 23 (1): 1 DOI: 10.1007/s10963-009-9032-4

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Springer Science+Business Media. "Ice Age climate change did not pose significant challenges to first Americans, study suggests." ScienceDaily. ScienceDaily, 14 April 2010. <www.sciencedaily.com/releases/2010/04/100412084527.htm>.
Springer Science+Business Media. (2010, April 14). Ice Age climate change did not pose significant challenges to first Americans, study suggests. ScienceDaily. Retrieved August 29, 2015 from www.sciencedaily.com/releases/2010/04/100412084527.htm
Springer Science+Business Media. "Ice Age climate change did not pose significant challenges to first Americans, study suggests." ScienceDaily. www.sciencedaily.com/releases/2010/04/100412084527.htm (accessed August 29, 2015).

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