
TY  - JOUR
A1  - Kafka, Victor 
A1  - Gauthier, Sylvie 
A1  - Bergeron, Yves 
T1  - Fire impacts and crowning in the boreal forest: study of a large wildfire in western Quebec
JF  - International Journal of Wildland Fire
JO  - Int. J. Wildland Fire
Y1  - 2001
VL  - 10
IS  - 2
SP  - 119
EP  - 127
KW  - Black spruce, Canada, disturbance, firebehaviour, geographic information systems, GIS, jack pine, log&#8211;linearmodel, stepwise logistic regression.
UR  - https://doi.org/10.1071/WF01012 
N2  - Within the context of studying the ecological impacts of wildland fires in the boreal forest, a spatial analysis of a major wildfire was conducted. The fire covered nearly 500 km 2 in the north-western part of Quebec&#8217;s boreal forest in the summer of 1995. The spatial distribution of different fire impacts on the forest canopy was obtained using timber damage assessment maps. Fire impacts varied throughout the burned area, ranging from areas where trees had completely burned crowns (43%) to remaining patches of trees with green foliage (3%). The effects of local stand and site factors on crown fire, as assessed by the fire impacts, were evaluated using geographic information systems. Despite the large extent and high intensity of the wildfire created by extreme fire weather conditions, stepwise logistic regression and analysis by log&#8211;linear models indicated that variations in surface material, stand composition, and estimated stand age played a role in the presence or absence of crowning at the stand level. However, it appears that height and density of stand, as well as topography, did not have a significant influence. Our study presents the variability of fire impacts and its implications, and it provides a better understanding of the relationships between landscape components and fire crowning. R&#233;sum&#233;.Dans le cadre de l&#8217;&#233;tude de la dynamique de la for&amp;ecircumflex;t bor&#233;ale, une analyse d&#8217;un grand incendie a &#233;t&#233; r&#233;alis&#233;e. &Agrave; la fin de l&#8217;&#233;t&#233; 1995, cet incendie a couvert un territoire de pr&#232;s de 500 km 2 dans la partie nord-ouest de la for&amp;ecircumflex;t bor&#233;ale qu&#233;b&#233;coise. La distribution spatiale des impacts du feu sur la voute foresti&#232;re a &#233;t&#233; obtenue &agrave; partir de cartes d&#8217;&#233;valuation des dommages aux for&amp;ecircumflex;ts caus&#233;s par le feu. Dans la zone br&amp;ucircumflex;l&#233;e, la gamme des impacts de l&#8217;incendie varie d&#8217;&#233;tendues o&ugrave; les arbres pr&#233;sentent des cimes compl&#232;tement br&amp;ucircumflex;l&#233;es (43%) &agrave; des secteurs o&ugrave; le feuillage des arbres est demeur&#233; vert (3%). L&#8217;effet de facteurs biotiques et abiotiques sur l&#8217;occurrence d&#8217;un feu de cime a &#233;t&#233; &#233;tabli &agrave; l&#8217;aide d&#8217;un syst&#232;me d&#8217;information g&#233;ographique. Une r&#233;gression logistique pas &agrave; pas et une analyse de mod&#232;les log-lin&#233;aires ont r&#233;v&#233;l&#233; que certaines modalit&#233;s des d&#233;p&#244;ts de surface, de la composition et de l&#8217;&acirc;ge du peuplement ont jou&#233; un r&#244;le important dans l&#8217;occurrence d&#8217;un feu de cime au niveau du peuplement. Par contre, il semble que la hauteur et la densit&#233; du peuplement, ainsi que la topographie, n&#8217;aient pas eu d&#8217;effets significatifs. Notre &#233;tude met en lumi&#232;re la variabilit&#233; et l&#8217;importance des impacts d&#8217;un incendie, tout en permettant de mieux comprendre la relation entre les composantes du territoire et le comportement des incendies. 
ER  -

