Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands

doi:10.1029/2018JG004915

IMR OpenIR

	Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands
	Ma, Tian 1,2; Dai, Guohua 1; Zhu, Shanshan 1,2; Chen, Dima 1; Chen, Litong 3; Lu, Xiaotao 4; Wang, Xiaobo 4; Zhu, Juntao 5; Zhang, Yangjian 2,5; Ma, Wenhong 6; He, Jin-Sheng 7,8; Bai, Yongfei 1,2; Han, Xingguo 1,2; Feng, Xiaojuan 1,2
通讯作者	Feng, Xiaojuan(xfeng@ibcas.ac.cn)
	2019-02-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	124 期号:2 页码:420-431
摘要	The relative contribution of roots versus shoots to soil organic carbon (SOC) is a long-debated topic related to soil carbon formation and dynamics. However, the variation of root- and shoot-derived carbon in natural soils remains poorly constrained due to limited tools to separate them. Here we overcome the difficulty by analyzing biomarkers for root (suberin) and shoot (cutin) in grassland soils spanning >7,000km on the Qinghai-Tibetan and Mongolian Plateaus. Coupled with a comprehensive list of climatic, edaphic, and vegetation variables, we assess their inputs, distribution, and preservation patterns. We find that while suberin was a root-specific tracer, cutin biomarkers that occurred only in trace amount in roots also had a minor but nonnegligible contribution from belowground sources due to the massive root mass in the alpine grasslands. Both components had higher SOC-normalized concentrations in the alpine than temperate grasslands, along with a higher preservation percentage against net primary productivity and a lower degradation parameter, suggesting a better preservation of these plant-derived lipid components in the alpine region. Moreover, while cutin and suberin abundances were affected by plant inputs and other SOC constituents, the root mass normalized incorporation efficiency of suberin was only positively correlated to SOC in both regions with a steeper slope in the alpine grasslands and also negatively correlated to root mass in the alpine soils. These results imply that root carbon incorporation is sensitive to environmental variations in the cold region, suggesting potentially more dynamic alterations to root carbon sequestration with environmental changes.
关键词	alpine grasslands temperate grasslands cutin suberin root carbon incorporation efficiency
资助者	Chinese National Key Development Program for Basic Research ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; National Thousand Young Talents recruiting plan of China
DOI	10.1029/2018JG004915
收录类别	SCI
语种	英语
资助项目	Chinese National Key Development Program for Basic Research[2016YFC0500701] ; Chinese National Key Development Program for Basic Research[2015CB954201] ; National Natural Science Foundation of China[41422304] ; National Natural Science Foundation of China[31370491] ; National Natural Science Foundation of China[41503073] ; International Partnership Program of Chinese Academy of Sciences[151111KYSB20160014] ; National Thousand Young Talents recruiting plan of China
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000460859100015
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/132322
专题	中国科学院金属研究所
通讯作者	Feng, Xiaojuan
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China 3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Qinghai, Peoples R China 4.Chinese Acad Sci, Inst Appl Ecol, Shenyang, Liaoning, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China 6.Inner Mongolia Univ, Sch Ecol & Environm, Hohhot, Peoples R China 7.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing, Peoples R China 8.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland & Agroecosyst, Lanzhou, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Ma, Tian,Dai, Guohua,Zhu, Shanshan,et al. Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(2):420-431.
APA	Ma, Tian.,Dai, Guohua.,Zhu, Shanshan.,Chen, Dima.,Chen, Litong.,...&Feng, Xiaojuan.(2019).Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(2),420-431.
MLA	Ma, Tian,et al."Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.2(2019):420-431.