Patterns and environmental controls of soil organic carbon density in Chinese shrublands

doi:10.1016/j.geoderma.2019.114161

	Patterns and environmental controls of soil organic carbon density in Chinese shrublands
	Ge, Jielin ; Xu, Wenting ; Liu, Qing 1,2; Tang, Zhiyao 3,4; Xie, Zongqiang5
	2020
发表期刊	GEODERMA
ISSN	0016-7061
卷号	363
摘要	The soils of shrublands are important for organic carbon storage in terrestrial ecosystems, but geographical patterns and environmental controls of soil organic carbon (SOC) remain largely understudied compared to other terrestrial ecosystems, leaving a significant gap in our understanding of terrestrial ecosystem carbon budgets. Here, we quantified SOC density (SOCD) and its potential determinants based on a comprehensive dataset with a consistent stratified random sampling of extensive soil profiles down to the parent material or to one meter depth across 1211 sites across China. Our up-to-date estimate of SOCD in Chinese shrublands is an average of 8.36 kg m(-2), and ca. 43% of SOC is stored in the upper 20 cm relative to the one meter top soil, which is higher than estimates for shrublands globally. We also observed that SOCD was positively related to shrubland biomass and more so with belowground biomass. Furthermore, SOCD was positively related to mean annual precipitation (MAP), soil total nitrogen (N), phosphorus (P), clay and silt percent, but decreased with increasing mean annual temperature (MAT). Dark felty soils stored the highest SOCD and frigid desert soils stored the lowest. Soil total nitrogen (N), MAP, soil type, MAT, and belowground biomass, soil clay, and pH were the best predictors of total SOCD in Chinese shrublands. We concluded that Chinese shrubland soils store the lowest density of organic carbon so far recorded compared to forests and grasslands, and that the vertical distribution of SOC in Chinese shrublands was much shallower. While both climate (in particular MAP) and soil total N exerted dominant control over geographical patterns of SOCD across Chinese shrublands, soil type also played a significant role. Our study also emphasizes this key role of edaphic variables in determining the SOCD of shrublands and that they should be better incorporated into large-scale assessments of SOC dynamics. Our study extends existing work conducted in forest and grasslands and provides the most up-to-date knowledge on benchmark values for SOCD in Chinese shrublands, with important implications for predicting the fate of C stored in shrubland soils in response to climate change.
关键词	Carbon sequestration Geographical pattern Climate-vegetation-soil relationship Soil carbon storage
学科领域	Soil Science
DOI	10.1016/j.geoderma.2019.114161
收录类别	SCI
语种	英语
WOS关键词	TERRESTRIAL ECOSYSTEMS ; PRECIPITATION GRADIENT ; FOREST SOILS ; STORAGE ; STOCKS ; CLIMATE ; POOLS ; SEQUESTRATION ; VARIABILITY ; DRIVERS
WOS研究方向	Agriculture
WOS记录号	WOS:000515198500024
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	1872-6259
资助机构	Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050300] ; National Key Research and Development Program of China [2019YFD1100403] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31600360] ; Special Program for Basic Work of Science and technology of China [2015FY1103002-2]
作者邮箱	gejielin@ibcas.ac.cn ; zytang@urban.pku.edu.cn ; xie@ibcas.ac.cn
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21895
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat Biodivers Conservat Key Lab Sichuan, Chengdu 610041, Peoples R China 4.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Beijing 100871, Peoples R China 5.Peking Univ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ge, Jielin,Xu, Wenting,Liu, Qing,et al. Patterns and environmental controls of soil organic carbon density in Chinese shrublands[J]. GEODERMA,2020,363.
APA	Ge, Jielin,Xu, Wenting,Liu, Qing,Tang, Zhiyao,&Xie, Zongqiang.(2020).Patterns and environmental controls of soil organic carbon density in Chinese shrublands.GEODERMA,363.
MLA	Ge, Jielin,et al."Patterns and environmental controls of soil organic carbon density in Chinese shrublands".GEODERMA 363(2020).

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