Faster turnover of new soil carbon inputs under increased atmospheric CO 2
Abstract
Abstract Rising levels of atmospheric CO 2 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 CO 2 (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 CO 2 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 CO 2 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 slowmore »
- Authors:
-
[1];
[7];
- Geography, College of Life and Environmental Sciences University of Exeter Exeter UK, Center for Ecosystem Science and Society Northern Arizona University Flagstaff AZ USA
- Odum School of Ecology University of Georgia Athens GA USA
- AXA Chair Programme in Biosphere and Climate Impacts Department of Life Sciences Imperial College London Ascot UK
- 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 UK
- 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 USA
- Geography, College of Life and Environmental Sciences University of Exeter Exeter UK
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1389141
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Global Change Biology
- Additional Journal Information:
- Journal Name: Global Change Biology Journal Volume: 23 Journal Issue: 10; Journal ID: ISSN 1354-1013
- Publisher:
- Wiley-Blackwell
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
van Groenigen, Kees Jan, Osenberg, Craig W., Terrer, César, Carrillo, Yolima, Dijkstra, Feike A., Heath, James, Nie, Ming, Pendall, Elise, Phillips, Richard P., and Hungate, Bruce A. Faster turnover of new soil carbon inputs under increased atmospheric CO 2. United Kingdom: N. p., 2017.
Web. doi:10.1111/gcb.13752.
van Groenigen, Kees Jan, Osenberg, Craig W., Terrer, César, Carrillo, Yolima, Dijkstra, Feike A., Heath, James, Nie, Ming, Pendall, Elise, Phillips, Richard P., & Hungate, Bruce A. Faster turnover of new soil carbon inputs under increased atmospheric CO 2. United Kingdom. https://doi.org/10.1111/gcb.13752
van Groenigen, Kees Jan, Osenberg, Craig W., Terrer, César, Carrillo, Yolima, Dijkstra, Feike A., Heath, James, Nie, Ming, Pendall, Elise, Phillips, Richard P., and Hungate, Bruce A. Fri .
"Faster turnover of new soil carbon inputs under increased atmospheric CO 2". United Kingdom. https://doi.org/10.1111/gcb.13752.
@article{osti_1389141,
title = {Faster turnover of new soil carbon inputs under increased atmospheric CO 2},
author = {van Groenigen, Kees Jan and Osenberg, Craig W. and Terrer, César and Carrillo, Yolima and Dijkstra, Feike A. and Heath, James and Nie, Ming and Pendall, Elise and Phillips, Richard P. and Hungate, Bruce A.},
abstractNote = {Abstract Rising levels of atmospheric CO 2 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 CO 2 (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 CO 2 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 CO 2 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 CO 2 concentrations may be smaller than previously assumed.},
doi = {10.1111/gcb.13752},
journal = {Global Change Biology},
number = 10,
volume = 23,
place = {United Kingdom},
year = {Fri Jun 02 00:00:00 EDT 2017},
month = {Fri Jun 02 00:00:00 EDT 2017}
}
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