The effect of long-term water level drawdown on the vegetation composition and CO2 fluxes of a boreal peatland in central Finland

Authors: Faubert, Patrick
Advisor: Rochefort, Line; Vasander, Harri
Abstract: This study is providing a better understanding of the potential implications of the global climatic warming on Sphagnum dominated peatlands. The drainage of a part of the peatland began 55 years ago. Vegetation composition of the drained and natural areas was compared along six transects and analysed by ordination techniques. CO2 fluxes were measured during the growing season on one transect of the drained area and inferred by modelling. In response to drainage, vegetation composition changed and it was not related to a natural mire margin-mire expanse gradient. In the wetter part of the transect (far from the drainage ditch), gross photosynthesis and total respiration decreased. There was also slightly less CO2 sequestration than in the drier part. This study suggests for Sphagnum dominated peatlands that the effect of climate change might be reduced by a change of vegetation communities.
Document Type: Mémoire de maîtrise
Issue Date: 2004
Open Access Date: 11 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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