Past, current, and future fire frequencies in Quebec's commercial forests: implications for the cumulative effects of harvesting and fire on age-class structure and natural disturbance-based management

被引:134
作者
Bergeron, Yves
Cyr, Dominic
Drever, C. Ronnie
Flannigan, Mike
Gauthier, Sylvie
Kneeshaw, Daniel
Lauzon, Eve
Leduc, Alain
Le Goff, Heloise
Lesieur, Daniel
Logan, Kimberley
机构
[1] Univ Quebec, Chair Ind, CRSNG, UQAT,UQAM Amenagement Forestier Durable, Rouyn Noranda, PQ J9X 5E4, Canada
[2] Univ Quebec, Ctr Etude Foret, Montreal, PQ H3C 3P8, Canada
[3] Canadian Forest Serv, Nat Resources Canada, Great Lakes Forestry Ctr, Sault Ste Marie, ON P6A 2E5, Canada
[4] Canadian Forest Serv, Nat Resources Canada, Laurentian Forestry Ctr, Ste Foy, PQ G1V 4C7, Canada
关键词
D O I
10.1139/X06-177
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
The past decade has seen an increasing interest in forest management based on historical or natural disturbance dynamics. The rationale is that management that favours landscape compositions and stand structures similar to those found historically should also maintain biodiversity and essential ecological functions. In fire-dominated landscapes, this approach is feasible only if current and future fire frequencies are sufficiently low compared with the preindustrial fire frequency, so a substitution of fire by forest management can occur without elevating the overall frequency of disturbance. We address this question by comparing current and simulated future fire frequency based on 2 x CO2 and 3 x CO2 scenarios to historical reconstructions of fire frequency in the commercial forests of Quebec. For most regions, current and simulated future fire frequencies are lower than the historical fire frequency, suggesting that forest management could potentially be used to maintain or recreate the age-class distribution of fire-dominated preindustrial landscapes. Current even-aged management, however, tends to reduce forest variability by, for example, truncating the natural age-class distribution and eliminating mature and old-growth forests from the landscape. Therefore, in the context of sustainable forest management, silvicultural techniques that retain a spectrum of forest compositions and structures at different scales are necessary to maintain this variability and thereby allow a substitution of fire by harvesting.
引用
收藏
页码:2737 / 2744
页数:8
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