globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13752
论文题名:
Faster turnover of new soil carbon inputs under increased atmospheric CO2
作者: van Groenigen K.J.; Osenberg C.W.; Terrer C.; Carrillo Y.; Dijkstra F.A.; Heath J.; Nie M.; Pendall E.; Phillips R.P.; Hungate B.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:10
起始页码: 4420
结束页码: 4429
语种: 英语
英文关键词: isotopes ; meta-analysis ; respiration ; roots ; soil carbon ; turnover
英文摘要: Rising levels of atmospheric CO2 frequently stimulate plant inputs to soil, but the consequences of these changes for soil carbon (C) dynamics are poorly understood. Plant-derived inputs can accumulate in the soil and become part of the soil C pool (“new soil C”), or accelerate losses of pre-existing (“old”) soil C. The dynamics of the new and old pools will likely differ and alter the long-term fate of soil C, but these separate pools, which can be distinguished through isotopic labeling, have not been considered in past syntheses. Using meta-analysis, we found that while elevated CO2 (ranging from 550 to 800 parts per million by volume) stimulates the accumulation of new soil C in the short term (<1 year), these effects do not persist in the longer term (1–4 years). Elevated CO2 does not affect the decomposition or the size of the old soil C pool over either temporal scale. Our results are inconsistent with predictions of conventional soil C models and suggest that elevated CO2 might increase turnover rates of new soil C. Because increased turnover rates of new soil C limit the potential for additional soil C sequestration, the capacity of land ecosystems to slow the rise in atmospheric CO2 concentrations may be smaller than previously assumed. © 2017 John Wiley & Sons Ltd
资助项目: This work was supported by the U.S. Department of Energy (DOE), Office of Science, Biological and Environmental Research Program, under Award Number DE-SC-0010632. R.P.P. was supported by the U.S. Department of Agriculture NRI CSREES Program and by DOEs Terrestrial Ecosystem Science Program in the Climate and Environmental Sciences Division.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60794
Appears in Collections:影响、适应和脆弱性

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作者单位: Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, United States; Odum School of Ecology, University of Georgia, Athens, GA, United States; AXA Chair Programme in Biosphere and Climate Impacts, Department of Life Sciences, Imperial College London, Ascot, United Kingdom; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia; Centre for Carbon, Water and Food, School of Life and Environmental Sciences, The University of Sydney, Eveleigh, NSW, Australia; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Ministry of Education Key Lab for Biodiversity Science and Ecological Engineering, The Institute of Biodiversity Science, Fudan University, Shanghai, China; Department of Biology, Indiana University, Bloomington, IN, United States

Recommended Citation:
van Groenigen K.J.,Osenberg C.W.,Terrer C.,et al. Faster turnover of new soil carbon inputs under increased atmospheric CO2[J]. Global Change Biology,2017-01-01,23(10)
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