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Agriculture facilitated permanent human occupation of the Tibetan Plateau after 3600 B.P.
Colonizing the roof of the world
Humans only settled permanently on the Tibetan plateau about 3600 years ago. Chen et al. examined archaeological crop remains unearthed in northeastern Tibet, which elucidate the timing of agricultural settlement. Although much earlier traces of humans in Tibet have been dated to 20,000 years ago, year-round presence at the highest altitudes appears to have been impossible until the advent of suitable crops, such as barley. Surprisingly, these prehistoric farming communities expanded onto the plateau at the same time as climate was cooling.
Science, this issue p. 248
Abstract
Our understanding of when and how humans adapted to living on the Tibetan Plateau at altitudes above 2000 to 3000 meters has been constrained by a paucity of archaeological data. Here we report data sets from the northeastern Tibetan Plateau indicating that the first villages were established only by 5200 calendar years before the present (cal yr B.P.). Using these data, we tested the hypothesis that a novel agropastoral economy facilitated year-round living at higher altitudes since 3600 cal yr B.P. This successful subsistence strategy facilitated the adaptation of farmers-herders to the challenges of global temperature decline during the late Holocene.
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Published In
Science
Volume 347 | Issue 6219
16 January 2015
16 January 2015
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Copyright © 2015, American Association for the Advancement of Science.
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Submission history
Received: 24 July 2014
Accepted: 5 November 2014
Published in print: 16 January 2015
Acknowledgments
This research was funded by the project Strategic Priority Research Program–Climate Change: Carbon Budget and Relevant Issues of the Chinese Academy of Sciences (grant no. XDA05130601), the National Natural Science Foundation of China (grant nos. 41271218 and 41021091), the 111 Program (grant no. B06026) of the Chinese State Administration of Foreign Experts Affairs, and the European Research Council research project Food Globalisation in Prehistory (grant no. 249642). We thank O. Bar-Yosef for helpful comments. The biological and archaeological materials used in this paper are housed in the Key Laboratory of Western China’s Environmental Systems (Ministry of Education), Lanzhou University. Data are available in the supplementary materials.
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