ArticleAoB PLANTS2026
Precipitation and plant cover promote soil organic carbon accumulation in the northeastern Qinghai-Tibet Plateau.
Article in AoB PLANTS, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
As a core region for global high-altitude carbon cycling, the Qinghai-Tibet Plateau is a key region influencing the regulation of the global terrestrial carbon balance. However, the mechanisms controlling the accumulation of soil organic carbon (SOC) in this fragile ecosystem remain unclear. We surveyed 98 sample sites in the northeastern Qinghai-Tibet Plateau and analysed the data using Bayesian statistical methods. The 0-20 cm SOC storage in the Qinghai region is ∼0.37 Pg. Horizontally, SOC exhibited a decreasing trend from east to west, while vertically, it decreased with increasing soil depth, with a reduction of 24.28%. The result showed that plant cover and mean annual precipitation (MAP) were the dominant positive drivers of SOC accumulation in both soil layers (the 95% credible interval did not overlap with zero). Notably, plant cover and mean annual temperature had stronger effects on SOC in the surface layer. The Bayesian structural equation model indicated that plant cover, MAP, Shannon diversity index, and the litter
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