CGRG Bibliography of Canadian Geomorphology
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Author : Carcaillet, C.; Fréchette, B.; Capece, L.; Richard, P.J.H.; and Bergeron, Y.
Date : 2000.
Title : Changes of fire regime since 10000 years in the eastern Canada: a climatic then a vegetation forcing.
Publication : Workshop on Disturbance Dynamics in Boreal Forest. Kuhmo, Findland, August 21-25, 2000.
Issue :
Page(s) : 63.
Abstract
Two independent charcoal analyses exhibit significant changes of fire regime, at about 7500 and 2500 cal. yrs ago. The first reconstruction has been deduced from charcoal-influx anomalies from sites taken in a charcoal database. The study is based on 30 lakes encompassing the entire area from the northern forest-limit south to the mixed deciduous-dominated cold-temperate forests. Mapping of charcoal anomalies over, millennium by millennium, illustrates the spatio-temporal trends in fire status. Such a broad scale of analysis reveals the relationship between fire incidence and climate throughout the Holocene independent of regional vegetation pattern, microclimate, topography, or local fires set by Native Americans. The second approach is based on a high-resolution analysis of five laminated lakes allowing to detail the fire frequency in the boreal forest distributed along a vegetation gradient between latitudes 50-46°N. Differences in pattern of charcoal series evidence that vegetation zonation also contribute to the fire variability. Further, spectral analyses of high-resolution charcoal series covering the last 2000 years suggest that the local fire regime is controlled by local non-periodic processes while the regional spectrum exhibits a periodic phenomenon probably caused by climate.
Bibliography of Canadian Geomorphology