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A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland

文献类型：期刊论文

作者Zhou, Jian2,4; Chen, Shiping1; Yan, Liming2,4; Wang, Jing2,4; Jiang, Ming2,4; Liang, Junyi3; Zhang, Xuanze4,5; Xia, Jianyang2,4
刊名JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
出版日期2021-05-01
卷号126期号:5页码:14
ISSN号2169-8953
关键词heterotrophic respiration nonlinear process rain pulse effect soil carbon cycle model soil microbial model soil moisture
DOI10.1029/2020JG006120
通讯作者Zhang, Xuanze(xuanzezhang@igsnrr.ac.cn) ; Xia, Jianyang(jyxia@des.ecnu.cn)
英文摘要As a critical process in regulating terrestrial feedback to climate change, soil heterotrophic respiration is commonly simulated with the first-order kinetics in current Earth system models. Compared with the first-order kinetic models, explicit microbial models are expected to better simulate nonlinear carbon (C)-cycle phenomena, such as the pulse dynamics of soil heterotrophic respiration driven by dry-rewetting cycles in grasslands. However, these two types of models (i.e., linear conventional and nonlinear microbial models) have never been compared based on in situ observations of soil heterotrophic respiration in the semi-arid grassland, which is significantly affected by the dry-rewetting events. Here, based on the field data of soil heterotrophic respiration in a semi-arid grassland in northern China, we first showed that the shift from a conventional linear model to a nonlinear microbial model did not substantially improve the simulation of soil heterotrophic respiration. Then, we quantified the contributions of different moisture-response functions to the uncertainty in simulating the soil C dynamics. The results showed that the selection of moisture-response functions combined with parameterization in the soil C models dominated the modeled uncertainties in soil heterotrophic respiration. These findings suggest that both the conventional linear model and nonlinear microbial model can simulate well the pulse dynamic of soil heterotrophic respiration in grasslands with an improved parameterization of water regulation on soil carbon decomposition. This study also calls for more observations of nonlinear C phenomena for reducing the simulation uncertainty on soil C cycling in Earth system models.
WOS关键词EARTH SYSTEM ; QUANTIFYING UNCERTAINTIES ; CARBON RESPONSES ; ECOSYSTEM MODEL ; ELEVATED CO2 ; GLOBAL-MODEL ; MOISTURE ; NITROGEN ; DECOMPOSITION ; TEMPERATURE
资助项目National Key Research and Development Program of China[2017YFA0604603] ; National Natural Science Foundation of China[31800400] ; National Natural Science Foundation of China[41630528] ; Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China[161016]
WOS研究方向Environmental Sciences & Ecology ; Geology
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000655232300022
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China ; Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/163957]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Xuanze; Xia, Jianyang
作者单位1.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
2.East China Normal Univ, Res Ctr Global Change & Ecol Forecasting, Sch Ecol & Environm Sci, Shanghai, Peoples R China
3.China Agr Univ, Coll Grassland Sci & Technol, Dept Grassland Resource & Ecol, Beijing, Peoples R China
4.East China Normal Univ, Sch Ecol & Environm Sci, State Key Lab Estuarine & Coastal Res, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Jian,Chen, Shiping,Yan, Liming,et al. A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2021,126(5):14.
APA Zhou, Jian.,Chen, Shiping.,Yan, Liming.,Wang, Jing.,Jiang, Ming.,...&Xia, Jianyang.(2021).A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,126(5),14.
MLA Zhou, Jian,et al."A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126.5(2021):14.

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来源：地理科学与资源研究所

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