Articles | Volume 8, issue 2
https://doi.org/10.5194/soil-8-687-2022
https://doi.org/10.5194/soil-8-687-2022
Original research article
 | 
28 Oct 2022
Original research article |  | 28 Oct 2022

Biotic factors dominantly determine soil inorganic carbon stock across Tibetan alpine grasslands

Junxiao Pan, Jinsong Wang, Dashuan Tian, Ruiyang Zhang, Yang Li, Lei Song, Jiaming Yang, Chunxue Wei, and Shuli Niu

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We found that climatic, edaphic, plant and microbial variables jointly affect soil inorganic carbon (SIC) stock in Tibetan grasslands, and biotic factors have a larger contribution than abiotic factors to the variation in SIC stock. The effects of microbial and plant variables on SIC stock weakened with soil depth, while the effects of edaphic variables strengthened. The contrasting responses and drivers of SIC stock highlight differential mechanisms underlying SIC preservation with soil depth.