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February 25, 2026BiogeosciencesOpen Access

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

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Authors

GSGuy SapirAAAlon AngertYRYoav Oved Rosenberg

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Overview

Examines the impact of drainage and rewetting on organic matter preservation in peatlands, highlighting implications for carbon emissions.

Key Points

  • The aim is to assess the long-term effects of drainage and rewetting on soil organic matter (SOM) in peatlands.
  • Historical analysis of peatland degradation and restoration.
  • Excavation of five sediment cores from cropland over a former marsh.
  • Characterization of soil profiles with Rock-Eval® thermal analysis and aerobic respiration experiments.
  • Modeling SOM decomposition and integrating with historic data.
  • Mean SOM content in the top meter decreased from 68±4% to 21±2% over 66 years.
  • Rewetted and pristine peat had a mean SOM of 33±2% and 64±2%, respectively.
  • Lower CO2 emissions were found in rewetted areas, with reductions of 60%-85% compared to drained sections.
  • Approximately 13%-21% of SOM remains as resistant organic matter in degraded peat.

Cite This Study

Sapir et al. (2026) studied this question.

synapsesocial.com/papers/699e920af5123be5ed04ffe6https://doi.org/10.5194/bg-23-1403-2026
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Long-term Effects of Drainage and Rewetting on the Degradation and Preservation of Peat Organic Matter in Warm Climate2025
  2. 2Organic Carbon Degradation and Preservation in a Drained and Reflooded Peat Soil 2024
  3. 3Profile Differentiation of Soil Properties and Soil Organic Matter Quality as a Result of Soil Degradation in Drained Peatlands of the Temperate Zone2026
  4. 4From Drainage to Rewetting—Soil Transformations in European Agricultural Peatlands: A Review2026 · 4 citations
  5. 5Mineral stabilization slows losses of peatland carbon following long-term drainage for agriculture2026