Flux de carbone à l'échelle de l'écosystème avant et après scarifiage au sein d'un parterre de coupe en forêt boréale dans l'est du Canada

Authors: Giasson, Marc-André
Advisor: Margolis, HankCoursolle, Carole
Abstract: CO2 fluxes between the atmosphere and a recently-harvested site located in Québec’s boreal forest, Fluxnet-Canada Research Network’s HBS00 site, were studied using the eddy covariance technique for one year before application of a scarification treatment and one year after treatment. Carbon emissions were greater after scarification, rising from 111 to 175 g m-2 year-1, because of the destruction of part of the living aboveground vegetation on the site. Ecosystem respiration rates showed little variation between years. Carbon fluxes were also influenced by environmental conditions. Analysis of the residuals of the light response curves indicated that before scarification soil water content was, after light, the factor having the most influence on carbon fluxes. Following scarification, water vapor pressure deficit was the second most important factor.
Document Type: Mémoire de maîtrise
Issue Date: 2005
Open Access Date: 11 April 2018
Permalink: http://hdl.handle.net/20.500.11794/18086
Grantor: Université Laval
Collection:Thèses et mémoires

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