@article{f30f98efef1b4702a405837771a4aa01,
title = "Organic Matter Chemistry Drives Carbon Dioxide Production of Peatlands",
abstract = "Peatlands play a critical role in the global carbon (C) cycle, encompassing ∼30% of the 1,500 Pg of C stored in soils worldwide. However, this C is vulnerable to climate and land-use change. Ecosystem models predict the impact of perturbation on C fluxes based on soil C pools, yet responses could vary markedly depending on soil organic matter (SOM) chemistry. Here, we show that one SOM functional group responds strongly to environmental factors and predicts the risk of carbon dioxide (CO2) release from peatlands. The molecular composition of SOM in 125 peatlands differed markedly at the global scale due to variation in temperature, land-use, vegetation, and nutrient status. Despite this variation, incubation of peat from a subset of 11 sites revealed that O-alkyl C (i.e., carbohydrates) was the strongest predictor of aerobic CO2 production. This explicit link provides a simple parameter that can improve models of peatland CO2 fluxes.",
author = "Normand, {A. E.} and Turner, {B. L.} and Lamit, {L. J.} and Smith, {A. N.} and B. Baiser and Clark, {M. W.} and C. Hazlett and Kane, {E. S.} and E. Lilleskov and Long, {J. R.} and Grover, {S. P.} and Reddy, {K. R.}",
note = "Funding Information: The authors are grateful for the peat samples contributed by Nate Basiliko, A. Cheesman, C. Richardson, M.M Svenning, A.S. Enriquez, B. Clarkson, C.W. Schadt, C. Hazard, I. Dickie, E.S. Tuittila, J.A. Farmer, T. Larmola, J.M. McLaughlin, R.K. Kolka, L.I. Harris, L. Bragazza, M. Wang, T.R. Moore, P.Q. Thu, R. Andersen, C. McCalley, L. Tedersoo, R. Varner, C.C. Trettin, M.R. Turetsky, M.P. Waldrop, M. Warren, X. Chen, J.B. Yavitt, Z. Wang, J.A. Hribljan, J. Jauhiainen, M. K{\"o}n{\"o}nen, J. Rutherford, T. Ontl, A. Kohlenberg, and S. Juutinen. The authors thank Z. Siders, J. Rocca, K. Curtis, J. Hu, F. Ordonez, J. Chanton, L. Theobald, R. Schwartz, A. Bales, C. Bach, T. Behrmann, S. Harttung, E. Hodges, J. Zwart, K. Griffith, K. Beesley, S. Kelso, and L. Potvin for technical assistance. This material is based upon work supported by the National Science Foundation (NSF) Graduate Research Fellowship under Grant No. (GMO2432) including research travel supported by NSF Graduate Research Opportunities Worldwide and NSF Graduate Research Internship Program. A portion of this work was performed in the McKnight Brain Institute at the National High Magnetic Field Laboratory's AMRIS Facility, which is supported by National Science Foundation Cooperative Agreement No. DMR‐1157490 and the State of Florida. Any opinion, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of NSF. The authors declare no competing financial interests. Publisher Copyright: {\textcopyright} 2021. American Geophysical Union. All Rights Reserved.",
year = "2021",
month = sep,
day = "20",
doi = "10.1029/2021GL093392",
language = "English (US)",
volume = "48",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "18",
}