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Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands
Xin, Xiaoping1; Jin, Dongyan1,2; Ge, Yong3; Wang, Jianghao3; Chen, Jiquan4; Qi, Jiaguo4; Chu, Housen5; Shao, Changliang1; Murray, Philip J.6; Zhao, Ruixue2; Qin, Qi1; Tang, Huajun1
2020-10-01
Source PublicationGLOBAL BIOGEOCHEMICAL CYCLES
ISSN0886-6236
Volume34Issue:10Pages:16
Corresponding AuthorTang, Huajun(tanghuajun@caas.cn)
AbstractSoil organic carbon (SOC) is the most critical component of global carbon cycle in grassland ecosystems. There has been growing interest in understanding SOC dynamics and driving forces of grassland biomes at various temporal and spatial scales. Up to now, estimates of long-term and large-scale changes in SOC of grassland biomes have been mostly based on modeling approaches and manipulative experiments, rather than direct measurements. During 2007-2011, we repeated 141 soil profiles of the sampling in 1963-1964 (up to 1-m depth) to quantify the long-term changes of SOC storage in the major grassland types of Inner Mongolia in order to tease apart the relative contributions of climate change and grazing. We found that SOC decreased in all soil types, except in the eolian sandy soils, from 1963 to 2007, with an average reduction rate of 1.8 kg C m(-2) (similar to 22.9% or 0.52% year(-1)) in the grassland biome of Inner Mongolia. We quantitatively clustered the soils into four groups using principal component analysis (PCA) and detected clear spatial dependency of the changes on climate and grazing. The climate change was responsible for 15.3-34.9% of the total SOC variations, whereas grazing intensity accounted for <9.5% of the changes. Our findings indicated that climate change, rather than grazing, was the primary forcing for the changes in SOC of Inner Mongolia grasslands. We presume that other driving forces, such as changes in nongrazing-resultant wind erosion and atmospheric nitrogen deposition, might have played a role albeit their effects need to be further examined.
Keywordsoil organic carbon resampling climatic change livestock grazing temperate steppe Inner Mongolia Plateau
DOI10.1029/2020GB006559
WOS KeywordORGANIC-CARBON ; TEMPERATURE SENSITIVITY ; TERRESTRIAL ECOSYSTEMS ; STORAGE ; DYNAMICS ; MATTER ; STOCKS ; CHINA ; SEQUESTRATION ; NITROGEN
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0500600] ; National Key Research and Development Program of China[2017YFE0104500] ; National Natural Science Foundation of China[41771205] ; Earmarked Fund for China Agriculture Research System[CARS-34] ; Dynamics of Coupled Natural and Human Systems (CNH) Program of the NSF[1313761]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Earmarked Fund for China Agriculture Research System ; Dynamics of Coupled Natural and Human Systems (CNH) Program of the NSF
WOS Research AreaEnvironmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS IDWOS:000586572100010
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/156640
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTang, Huajun
Affiliation1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Informat, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China
4.Michigan State Univ, Dept Geog Environm & Spatial Sci, Ctr Global Change & Environm Observat, E Lansing, MI 48824 USA
5.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA USA
6.Rothamsted Res, Sustainable Soils & Grassland Syst Dept, Okehampton, England
Recommended Citation
GB/T 7714
Xin, Xiaoping,Jin, Dongyan,Ge, Yong,et al. Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2020,34(10):16.
APA Xin, Xiaoping.,Jin, Dongyan.,Ge, Yong.,Wang, Jianghao.,Chen, Jiquan.,...&Tang, Huajun.(2020).Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands.GLOBAL BIOGEOCHEMICAL CYCLES,34(10),16.
MLA Xin, Xiaoping,et al."Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands".GLOBAL BIOGEOCHEMICAL CYCLES 34.10(2020):16.
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