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

文献类型：期刊论文

作者Pan, Junxiao1; Wang, Jinsong1; Tian, Dashuan1; Zhang, Ruiyang1; Li, Yang1; Song, Lei1,2; Yang, Jiaming1; Wei, Chunxue1; Niu, Shuli1,2
刊名SOIL
出版日期2022-10-28
卷号8期号:2页码:687-698
ISSN号2199-3971
DOI10.5194/soil-8-687-2022
通讯作者Wang, Jinsong(wangjinsong@igsnrr.ac.cn) ; Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要The soil inorganic carbon (SIC) pool is a major component of soil carbon (C) pools, and clarifying the predictors of SIC stock is urgent for decreasing soil C losses and maintaining soil health and ecosystem functions. However, the drivers and their relative effects on the SIC stock at different soil depths remain largely unexplored. Here, we conducted a large-scale sampling to investigate the effects and relative contributions of abiotic (climate and soil) and biotic (plant and microbe) drivers on the SIC stock between topsoils (0-10 cm) and subsoils (20-30 cm) across Tibetan alpine grasslands. Results showed that the SIC stock had no significant differences between the topsoil and subsoil. The SIC stock showed a significant increase with altitude, pH and sand proportion, but declined with mean annual precipitation (MAP), plant aboveground biomass (PAB), plant coverage (PC), root biomass (RB), available nitrogen (AN), microbial biomass carbon (MBC), and bacterial abundance (BA) and fungal gene abundance (FA). For both soil layers, biotic factors had larger effects on the SIC stock than abiotic factors did. However, the relative importance of these determinants varied with soil depth, with the effects of plant and microbial variables on SIC stock weakening with soil depth, whereas the importance of climatic and edaphic variables increased with soil depth. Specifically, BA, FA and PC played dominant roles in regulating SIC stock in the topsoil, while soil pH contributed largely to the variation of SIC stock in the subsoil. Our findings highlight differential drivers over SIC stock with soil depth, which should be considered in biogeochemical models for better simulating and predicting SIC dynamics and its feedbacks to environmental changes.
WOS关键词NITROGEN DEPOSITION ; EXTRACTION METHOD ; ORGANIC-CARBON ; CLIMATE-CHANGE ; SEQUESTRATION ; DYNAMICS ; PLATEAU ; STABILIZATION ; ACIDIFICATION ; FUMIGATION
资助项目Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302] ; National Natural Science Foundation of China[31988102] ; National Natural Science Foundation of China[32101390] ; China National Postdoctoral Program for Innovative Talents[BX20200330]
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000876078300001
出版者COPERNICUS GESELLSCHAFT MBH
资助机构Second Tibetan Plateau Scientific Expedition and Research (STEP) program ; National Natural Science Foundation of China ; China National Postdoctoral Program for Innovative Talents
源URL[http://ir.igsnrr.ac.cn/handle/311030/186348]  
专题中国科学院地理科学与资源研究所
通讯作者Wang, Jinsong; Niu, Shuli
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Pan, Junxiao,Wang, Jinsong,Tian, Dashuan,et al. Biotic factors dominantly determine soil inorganic carbon stock across Tibetan alpine grasslands[J]. SOIL,2022,8(2):687-698.
APA Pan, Junxiao.,Wang, Jinsong.,Tian, Dashuan.,Zhang, Ruiyang.,Li, Yang.,...&Niu, Shuli.(2022).Biotic factors dominantly determine soil inorganic carbon stock across Tibetan alpine grasslands.SOIL,8(2),687-698.
MLA Pan, Junxiao,et al."Biotic factors dominantly determine soil inorganic carbon stock across Tibetan alpine grasslands".SOIL 8.2(2022):687-698.

入库方式： OAI收割

来源：地理科学与资源研究所

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