globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13074
论文题名:
Application of a two-pool model to soil carbon dynamics under elevated CO2
作者: Van Groenigen K.J.; Xia J.; Osenberg C.W.; Luo Y.; Hungate B.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期:12
起始页码: 4293
结束页码: 4297
语种: 英语
英文关键词: Carbon cycle ; Data assimilation ; Data-model fusion ; Priming ; Soil carbon model
Scopus关键词: carbon cycle ; carbon dioxide ; data processing ; soil carbon ; two-dimensional modeling ; carbon dioxide ; soil ; atmosphere ; carbon cycle ; chemistry ; climate change ; soil ; theoretical model ; Atmosphere ; Carbon Cycle ; Carbon Dioxide ; Climate Change ; Models, Theoretical ; Soil
英文摘要: Elevated atmospheric CO2 concentrations increase plant productivity and affect soil microbial communities, with possible consequences for the turnover rate of soil carbon (C) pools and feedbacks to the atmosphere. In a previous analysis (Van Groenigen et al., 2014), we used experimental data to inform a one-pool model and showed that elevated CO2 increases the decomposition rate of soil organic C, negating the storage potential of soil. However, a two-pool soil model can potentially explain patterns of soil C dynamics without invoking effects of CO2 on decomposition rates. To address this issue, we refit our data to a two-pool soil C model. We found that CO2 enrichment increases decomposition rates of both fast and slow C pools. In addition, elevated CO2 decreased the carbon use efficiency of soil microbes (CUE), thereby further reducing soil C storage. These findings are consistent with numerous empirical studies and corroborate the results from our previous analysis. To facilitate understanding of C dynamics, we suggest that empirical and theoretical studies incorporate multiple soil C pools with potentially variable decomposition rates. © 2015 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61652
Appears in Collections:影响、适应和脆弱性

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作者单位: Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States; Department of Botany and Microbiology, University of Oklahoma, Norman, OK, United States; Tiantong National Forest Ecosystem Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China; Odum School of Ecology, University of Georgia, Athens, GA, United States; Center for Earth System Sciences, Tsinghua University, Beijing, China; Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, United States

Recommended Citation:
Van Groenigen K.J.,Xia J.,Osenberg C.W.,et al. Application of a two-pool model to soil carbon dynamics under elevated CO2[J]. Global Change Biology,2015-01-01,21(12)
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