Articles | Volume 23, issue 4
https://doi.org/10.5194/bg-23-1403-2026
https://doi.org/10.5194/bg-23-1403-2026
Research article
 | 
23 Feb 2026
Research article |  | 23 Feb 2026

Long-term effects of drainage and rewetting on the degradation and preservation of peat organic matter in sub-tropical climate

Guy Sapir, Alon Angert, Yoav Oved Rosenberg, and Rotem Golan

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Cited articles

Aboussou, A.: New Rock-Eval method for Pyritic and Organic Sulphur quantification: Application to study Organic Matter preservation in Jurassic sediments, Doctoral dissertation, Sorbonne Université, NNT: 2018SORUS529, 2018. 
Angert, A., Yakir, D., Rodeghiero, M., Preisler, Y., Davidson, E. A., and Weiner, T.: Using O2 to study the relationships between soil CO2 efflux and soil respiration, Biogeosciences, 12, 2089–2099, https://doi.org/10.5194/bg-12-2089-2015, 2015. 
Bader, C., Müller, M., Schulin, R., and Leifeld, J.: Peat decomposability in managed organic soils in relation to land use, organic matter composition and temperature, Biogeosciences, 15, 703–719, https://doi.org/10.5194/bg-15-703-2018, 2018. 
Barré, P., Eglin, T., Christensen, B. T., Ciais, P., Houot, S., Kätterer, T., van Oort, F., Peylin, P., Poulton, P. R., Romanenkov, V., and Chenu, C.: Quantifying and isolating stable soil organic carbon using long-term bare fallow experiments, Biogeosciences, 7, 3839–3850, https://doi.org/10.5194/bg-7-3839-2010, 2010. 
Barré, P., Plante, A. F., Cécillon, L., Lutfalla, S., Baudin, F., Bernard, S., Christensen, B. T., Eglin, T., Fernandez, J. M., Houot, S., Kätterer, T., Le Guillou, C., Macdonald, A., van Oort, F., and Chenu, C.: The energetic and chemical signatures of persistent soil organic matter, Biogeochemistry, 130, 1, https://doi.org/10.1007/s10533-016-0246-0, 2016. 
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Peatland drainage causes over 3.5 % of global anthropogenic GHG emissions, with ~75 % from warm climates. This study examines a drained and partially rewetted warm-climate wetland. Over 66 years, drainage caused ~70 % loss of soil organic matter and substantial CO2 emissions. Rewetting, initiating ~30 years ago, helped preserve organic matter. Yet, long-term data and modeling shows a limited window for its effectiveness, highlighting the need to prioritize sites based on time since drainage.
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