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Title: Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world

Abstract

In a 26-year soil warming experiment in a mid-latitude hardwood forest, we documented changes in soil carbon cycling to investigate the potential consequences for the climate system. We found that soil warming results in a four-phase pattern of soil organic matter decay and carbon dioxide fluxes to the atmosphere, with phases of substantial soil carbon loss alternating with phases of no detectable loss. Several factors combine to affect the timing, magnitude, and thermal acclimation of soil carbon loss. These include depletion of microbially accessible carbon pools, reductions in microbial biomass, a shift in microbial carbon use efficiency, and changes in microbial community composition. Our results support projections of a long-term, self-reinforcing carbon feedback from mid-latitude forests to the climate system as the world warms.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ; ORCiD logo; ORCiD logo;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1438093
Grant/Contract Number:  
award307557; DOE-DE-SC0070740; award307558; DOE DE-SC0016590
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 358 Journal Issue: 6359; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Melillo, J. M., Frey, S. D., DeAngelis, K. M., Werner, W. J., Bernard, M. J., Bowles, F. P., Pold, G., Knorr, M. A., and Grandy, A. S. Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world. United States: N. p., 2017. Web. doi:10.1126/science.aan2874.
Melillo, J. M., Frey, S. D., DeAngelis, K. M., Werner, W. J., Bernard, M. J., Bowles, F. P., Pold, G., Knorr, M. A., & Grandy, A. S. Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world. United States. doi:10.1126/science.aan2874.
Melillo, J. M., Frey, S. D., DeAngelis, K. M., Werner, W. J., Bernard, M. J., Bowles, F. P., Pold, G., Knorr, M. A., and Grandy, A. S. Thu . "Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world". United States. doi:10.1126/science.aan2874.
@article{osti_1438093,
title = {Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world},
author = {Melillo, J. M. and Frey, S. D. and DeAngelis, K. M. and Werner, W. J. and Bernard, M. J. and Bowles, F. P. and Pold, G. and Knorr, M. A. and Grandy, A. S.},
abstractNote = {In a 26-year soil warming experiment in a mid-latitude hardwood forest, we documented changes in soil carbon cycling to investigate the potential consequences for the climate system. We found that soil warming results in a four-phase pattern of soil organic matter decay and carbon dioxide fluxes to the atmosphere, with phases of substantial soil carbon loss alternating with phases of no detectable loss. Several factors combine to affect the timing, magnitude, and thermal acclimation of soil carbon loss. These include depletion of microbially accessible carbon pools, reductions in microbial biomass, a shift in microbial carbon use efficiency, and changes in microbial community composition. Our results support projections of a long-term, self-reinforcing carbon feedback from mid-latitude forests to the climate system as the world warms.},
doi = {10.1126/science.aan2874},
journal = {Science},
number = 6359,
volume = 358,
place = {United States},
year = {2017},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1126/science.aan2874

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Cited by: 52 works
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