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Carbon dioxide emissions in relation to water table in a restored fen

Published Article

United States

Publication date: July 13, 2023

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This study examines carbon dioxide emissions in a restored fen at Cold Spring, Minnesota, revealing how water table depth shapes peat CO₂ flux across the growing season. Findings highlight the role of hydrologic restoration in reducing emissions and improving carbon sequestration, offering guidance for peatland management and climate mitigation strategies.

Subject Tags

  • Carbon storage
  • Watersheds

Abstract

Many peatlands have been drained for anthropogenic purposes, and there is high interest in restoring them for their carbon storage ability and critical habitat. Peatlands hold a disproportionate amount of global soil carbon, making peatland restoration a promising approach for mitigating carbon emissions. In this study, site factors were investigated that affect peat carbon dioxide flux at Cold Spring fen in Minnesota, which is undergoing restoration. Peat carbon dioxide flux and water table depth were monitored throughout the growing season at two locations previously disturbed to different degrees by row-crop agriculture. Flux ranged from 0.55 to 12.71 µmol m−2 s−1 and was highest during peak growing season. Lower flux corresponded to elevated water table conditions. The more disturbed location often had lower flux, indicating success in hydrological restoration. The water table is an important factor in peatland restoration, and water table management should be considered to maximize carbon sequestration.

Citation

Wille, E. A., Lenhart, C. F., & Kolka, R. K. (2023). Carbon dioxide emissions in relation to water table in a restored fen. Agricultural & Environmental Letters, 8(2), e20112.

https://doi.org/10.1002/ael2.20112

TNC Authors