L'effet du patron de répartition des coupes et des variables du milieu sur les pertes par chablis dans les lisières : cas de la pessière à mousses de l'Est
|Abstract:||Mosaic cut is one of the patterns used in Québec forest management to reduce the impacts of clearcutting and to increase the retention of mature forest. However, the global effect of mosaic cut pattern on windthrow losses has yet to be gauged. The aim of this research is to define the impact of the dispersion cut pattern on winthrow losses and to identify the variables that have an incidence on winthrow within forest edges. The study area was 150 km north of lac Saint-Jean (Québec, Canada) in even aged black spruce forest. Windthrow was inventoried in edges of conventionnal cut and in edges of mosaic cut with experimental plots of 10 meters large and 50 meters long. A cartographic survey was also conducted. Thus, windthrow photo interpretation in edges was done using 1: 10 000 scaled photos. After the analyses, spacing, height, edge type, species composition and diameter turned out to explain significantly windthrow at the edge scale. Photo interpretation data allowed the estimation of windthrow losses for each cut pattern. Within 30 meters inside the edges, losses are 10% more important on the conventional cut pattern. Consequences for management are then discussed.|
|Document Type:||Mémoire de maîtrise|
|Open Access Date:||13 April 2018|
|Collection:||Thèses et mémoires|
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