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

doi:10.1029/2020JG006120

	A Comparison of Linear Conventional and Nonlinear Microbial Models for Simulating Pulse Dynamics of Soil Heterotrophic Respiration in a Semi-Arid Grassland
	Zhou, Jian 1; Chen, Shiping2 ; Yan, Liming 1; Wang, Jing 1; Jiang, Ming 1; Liang, Junyi 3; Zhang, Xuanze 4; Xia, Jianyang 1
	2021
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
卷号	126 期号:5
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.
关键词	heterotrophic respiration nonlinear process rain pulse effect soil carbon cycle model soil microbial model soil moisture
学科领域	Environmental Sciences ; Geosciences, Multidisciplinary
DOI	10.1029/2020JG006120
收录类别	SCI
语种	英语
WOS关键词	EARTH SYSTEM ; QUANTIFYING UNCERTAINTIES ; CARBON RESPONSES ; ECOSYSTEM MODEL ; ELEVATED CO2 ; GLOBAL-MODEL ; MOISTURE ; NITROGEN ; DECOMPOSITION ; TEMPERATURE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000655232300022
出版者	AMER GEOPHYSICAL UNION
文献子类	Article
出版地	WASHINGTON
EISSN	2169-8961
资助机构	National Key Research and Development Program of China [2017YFA0604603] ; National Natural Science Foundation of China [31800400, 41630528] ; Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China [161016]
作者邮箱	xuanzezhang@igsnrr.ac.cn ; jyxia@des.ecnu.cn
引用统计	被引频次：6[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/2S10CLM1/26781
专题	植被与环境变化国家重点实验室
作者单位	1.East China Normal Univ, Sch Ecol & Environm Sci, State Key Lab Estuarine & Coastal Res, Zhejiang Tiantong Forest Ecosyst Natl Observat &, Shanghai, Peoples R China 2.East China Normal Univ, Res Ctr Global Change & Ecol Forecasting, Sch Ecol & Environm Sci, Shanghai, Peoples R China 3.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China 4.China Agr Univ, Coll Grassland Sci & Technol, Dept Grassland Resource & Ecol, Beijing, 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).
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).
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).

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