Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands

doi:10.1029/2020GB006559

	Climate Change Dominated Long-Term Soil Carbon Losses of Inner Mongolian Grasslands
	Xin, Xiaoping 1; Jin, Dongyan 1,2; Ge, Yong 3; Wang, Jianghao 3; Chen, Jiquan 4; Qi, Jiaguo 4; Chu, Housen 5; Shao, Changliang 1; Murray, Philip J.6; Zhao, Ruixue 2
刊名	GLOBAL BIOGEOCHEMICAL CYCLES
	2020-10-01
卷号	34 期号:10 页码:16
关键词	soil organic carbon resampling climatic change livestock grazing temperate steppe Inner Mongolia Plateau
ISSN号	0886-6236
DOI	10.1029/2020GB006559
通讯作者	Tang, Huajun(tanghuajun@caas.cn)
英文摘要	Soil 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.
资助项目	National 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]
WOS关键词	ORGANIC-CARBON ; TEMPERATURE SENSITIVITY ; TERRESTRIAL ECOSYSTEMS ; STORAGE ; DYNAMICS ; MATTER ; STOCKS ; CHINA ; SEQUESTRATION ; NITROGEN
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000586572100010
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/156639]
专题	中国科学院地理科学与资源研究所
通讯作者	Tang, Huajun
作者单位	1.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
推荐引用方式 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.