globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004233
Scopus记录号: 2-s2.0-85041025013
论文题名:
Large-Scale Distribution of Molecular Components in Chinese Grassland Soils: The Influence of Input and Decomposition Processes
作者: Dai G.; Ma T.; Zhu S.; Liu Z.; Chen D.; Bai Y.; Chen L.; He J.-S.; Zhu J.; Zhang Y.; Lü X.; Wang X.; Han X.; Feng X.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:1
起始页码: 239
结束页码: 255
语种: 英语
英文关键词: aliphatic lipid ; biomarker ; carbohydrate ; Inner Mongolia ; Qinghai-Tibetan Plateau ; soil organic carbon
Scopus关键词: aliphatic hydrocarbon ; belowground biomass ; biomarker ; carbohydrate ; carbon sequestration ; chemical composition ; decomposition ; grassland soil ; lipid ; molecular analysis ; organic carbon ; soil carbon ; soil organic matter ; spatial distribution ; China ; Nei Monggol ; Qinghai-Xizang Plateau
英文摘要: Chinese grasslands hold a third of the national soil organic carbon (OC) stocks but remain poorly investigated in terms of soil molecular components and their distribution patterns. Such information is important for understanding mechanisms governing grassland soil OC dynamics and its response to global changes. Here employing solvent-extractable compounds as a group of widely used biomarkers, we present a large-scale study on the distribution of different soil OC components (including plant- and microbial-derived carbohydrates and aliphatic and cyclic lipids) in the surface soils of Chinese grasslands, spanning from temperate grasslands in the arid/semiarid regions to alpine grasslands on the Qinghai-Tibetan Plateau. We show that alpine grassland soils are more enriched with carbohydrates and plant-derived compounds relative to the temperate counterparts due to temperature-inhibited decomposition. While plant belowground biomass plays a key role in explaining the spatial variation of compounds in the alpine grasslands, climatic variables do in the temperate region. In particular, aliphatic lipids accumulate with increasing mean annual temperature in the temperate grasslands due to a preferential decay of labile soil OC, whereas they decrease in the alpine grasslands owing to dilution by an enhanced plant input of nonlipid components. Collectively, these results demonstrate different mechanisms governing the distribution of solvent-extractable compounds in grassland soils, with climate-mediated decomposition processes dominating in the temperate grasslands and plant inputs being more important in the alpine region. In the context of climate change, alterations to soil OC input and decomposition processes may have varied impacts on soil carbon cycling in these two regions. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114812
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China; Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, China; Department of Ecology, College of Urban and Environmental Sciences, Peking University, Beijing, China; Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China

Recommended Citation:
Dai G.,Ma T.,Zhu S.,et al. Large-Scale Distribution of Molecular Components in Chinese Grassland Soils: The Influence of Input and Decomposition Processes[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(1)
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