DOI: 10.1016/j.foreco.2015.03.011
Scopus记录号: 2-s2.0-84925278966
论文题名: Lengthening the historical records of fire history over large areas of boreal forest in eastern Canada using empirical relationships
作者: Irulappa Pillai Vijayakumar D.B. ; Raulier F. ; Bernier P.Y. ; Gauthier S. ; Bergeron Y. ; Pothier D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 347 起始页码: 30
结束页码: 39
语种: 英语
英文关键词: Boreal forest
; Decadal burn rate
; Fire history
; Random forests
; Succession
; Time since last fire
Scopus关键词: Cells
; Cytology
; Decision trees
; Boreal forests
; Burn rates
; Fire history
; Random forests
; Succession
; Fires
; biophysics
; boreal forest
; empirical analysis
; fire history
; forest inventory
; forest management
; historical record
; spatiotemporal analysis
; strategic approach
; succession
; Canada
英文摘要: Fire plays an important role for boreal forest succession, and time since last fire (TSLF) is therefore seen as a useful covariate to devise forest management strategies, but TSLF information is currently either spatially or temporarily limited. We therefore developed a TSLF map for an extensive region in eastern Canada (217,000km2) by generalizing the empirical relationships that exist between regional historical records of fire (1880-2000) with forest inventory data and biophysical variables. Two random forest models were used to predict TSLF at the scale of 2-km2 cells. These cells were first classified into TSLF≤120years and >120years and TSLF was then estimated by decade for cells classified as younger than 120years. Overall, both models showed a substantial agreement at the scale of both the study area and landscape units, but the accuracy remained fairly low at the scale of individual cells. Results show that the decades between 1920 and 1940 were characterized by widespread fire activity covering approximately 28% of the study region. Studies have reported a doubling of the burn rate from 1970 to 2000, but our longer-term analysis suggests that the 1970-2000 burn rate (4.3% decade-1) is lower than the one detected between 1920 and 1940 (16.4% decade-1) and provides a relevant context for interpreting the recent increases in area burned observed since 1970. These results highlight the importance of lengthening the historical records of fire history maps in order to provide a better perspective of the actual changes of fire regime. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65462
Appears in Collections: 影响、适应和脆弱性
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作者单位: Centre d'Étude de la Forêt, Faculté de foresterie, de géographie et de géomatique, Université Laval, 2405 rue de la Terrasse, Québec, QC, Canada; Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., P.O. Box 10380, Station Sainte-Foy, Québec, QC, Canada; Centre d'Étude de la Forêt, NSERC-UQAT-UQAM Industrial Chair in Sustainable Forest Management, Université du Québec en Abitibi-Témiscamingue, 445 boul. de l'Université, Rouyn-Noranda, QC, Canada
Recommended Citation:
Irulappa Pillai Vijayakumar D.B.,Raulier F.,Bernier P.Y.,et al. Lengthening the historical records of fire history over large areas of boreal forest in eastern Canada using empirical relationships[J]. Forest Ecology and Management,2015-01-01,347