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Distribution and Preservation of Root- and Shoot-Derived Carbon Components in Soils Across the Chinese-Mongolian Grasslands
Ma, Tian1; Dai, Guohua; Zhu, Shanshan1; Chen, Dima; Chen, Litong2; Lu, Xiaotao3; Wang, Xiaobo3; Zhu, Juntao4; Zhang, Yangjian1,4; Ma, Wenhong5; He, Jin-Sheng; Bai, Yongfei1; Han, Xingguo1; Feng, Xiaojuan1
AbstractThe 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.
Keywordalpine grasslands temperate grasslands cutin suberin root carbon incorporation efficiency
Subject AreaEnvironmental Sciences ; Geosciences, Multidisciplinary
Indexed BySCI
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS IDWOS:000460859100015
Publication PlaceWASHINGTON
Funding OrganizationChinese National Key Development Program for Basic Research [2016YFC0500701, 2015CB954201] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41422304, 31370491, 41503073] ; International Partnership Program of Chinese Academy of Sciences [151111KYSB20160014] ; National Thousand Young Talents recruiting plan of China
Corresponding Author Emailxfeng@ibcas.ac.cn
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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.
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