Wetlands Ecology and Management

, Volume 11, Issue 6, pp 419–432 | Cite as

Ecosystem-scale flux of CO2 from a restored vacuum harvested peatland

  • Richard M. Petrone
  • J.M. Waddington
  • Jonathan S. Price
Article

Abstract

At the ecosystem scale, the water and gasexchange processes are strongly coupled.Drainage and removal of a peatland'ssurface vegetation cover for peatharvesting alters its hydrology, and as adirect consequence the carbon budget.Previous studies have measuredpeatland-atmosphere carbon exchange usingthe chamber methodology. These studies haveindicated that the spatial and temporalvariability is large, suggesting the needfor continuous ecosystem-scalemeasurements. This paper presents ecosystemscale measurements of the atmosphericexchange of water and carbon dioxide(CO2) from a restored vacuum-harvestedpeatland in eastern Québec, Canada,using the eddy correlation measurementapproach.Results indicate that the adoptedrestoration practices reduce the loss ofwater from the peat. Evapotranspirationfrom the restored site was 20 and 25% lessthan that from an adjacent abandonedcomparison site in 2000 and 2001respectively. However, CO2 emissionsremain large during non-snow periods (478and 468 g C m-2 in 2000 and 2001,respectively). The blockage of drainageditches and the existence of a mulch coverat the site keep the moisture and thermalconditions more or less constant.Consequently, the CO2 flux, which ispredominantly soil respiration, is stronglycontrolled by peat temperaturefluctuations.

carbon dioxide eddy correlation evapotranspiration peatland restoration 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Richard M. Petrone
    • 1
  • J.M. Waddington
    • 2
  • Jonathan S. Price
    • 3
  1. 1.Department of Geography and Environmental StudiesWilfrid Laurier UniversityWaterlooCanada
  2. 2.School of Geography & GeologyMcMaster UniversityHamiltonCanada
  3. 3.Wetlands Research Centre and Department of GeographyUniversity of WaterlooCanada

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