Abstract
Often referred to as the “Third Pole”, the Tibetan Plateau combines high elevation, extreme cold temperatures, hyper-aridity, and low oxygen levels. The strategy that early populations adopted to adapt to the harsh environment of the Tibetan Plateau has always attracted much attention. However, relevant studies have predominantly focused on the relatively lower elevation northeastern part of the Tibetan Plateau (<3000 m a.s.l.), with limited study in areas of ultrahigh elevation (>3500 m a.s.l.). This paper employed the flotation method and charcoal analysis of survey profiles from thirteen archaeological sites in the ultrahigh-elevation region of the middle Yarlung Zangbo River basin on the southern Tibetan Plateau, and finds that ancient people have been active in this region since the last deglaciation. The primary fuel sources used by ancient populations were small trees such as sea buckthorn (Hippophae gyantsensis) and shrubs such as juniper (Juniperus). The widespread use of undesirable wood (dwarf thorny shrub) like Sophora moorcroftiana and Caragana, along with the phenomenon of many sites relying on a single taxon, reflects the prevalent issue of fuel scarcity in this ultrahigh-elevation region. This might have been a driving factor for the early adoption of animal dung as a primary fuel source by ancient populations on the southern Tibetan Plateau.
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