DOI: 10.1016/j.foreco.2013.08.055
Scopus记录号: 2-s2.0-84884386518
论文题名: Young jack pine and high severity fire combine to create potentially expansive areas of understocked forest
作者: Pinno B.D. ; Errington R.C. ; Thompson D.K.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 517
结束页码: 522
语种: 英语
英文关键词: Boreal forest
; Burn severity
; Composite burn index
; Differential normalised burn ratio
; Ecosystem resiliency
; Forest regeneration
Scopus关键词: Boreal forests
; Burn Severity
; Composite burn indices
; Differential normalised burn ratio
; Forest regeneration
; Ecosystems
; Reforestation
; Satellite imagery
; Fires
; boreal forest
; community composition
; coniferous tree
; ecosystem resilience
; forest ecosystem
; forest fire
; population density
; prediction
; reforestation
; regeneration
; Richardson number
; Alberta
; Canada
英文摘要: Jack pine is a fire adapted species considered to regenerate well after fires of all severities. The Richardson Fire was an extreme megafire event that burned 576,000. ha of jack pine dominated boreal forest in 2011 in northern Alberta, Canada. Initial scouting immediately after the fire identified a great deal of variability in jack pine regeneration seemingly related to fire severity and pre-fire stand composition. We sampled tree regeneration in 56 pure jack pine stands across the range of fire severity and pre-fire stand ages 1. year post-fire. We found that jack pine regeneration density was greater in older stands (>60 years old) compared to younger stands (<30. years old) and in moderate severity burns compared to high severity burns. In young stands with high severity burns, jack pine regeneration averaged only 1164 seedlings per hectare which is well below current stand densities indicating a potentially understocked future forest. At the landscape level, we extrapolated fire severity to the entire fire area using pre and post-fire satellite imagery and found that the area of young jack pine stands which had a high severity burn, and therefore likely low seedling regeneration, was greater than 130,000. ha with most of this area occurring in patches greater than 500. ha in size. Overall, our results suggest that young jack pine may not be as resilient to high severity fires as previously thought and that a large area of burned boreal forest may be at risk of conversion from a closed canopy forest to a more open canopy woodland ecosystem given the predicted changes in fire regime. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66321
Appears in Collections: 影响、适应和脆弱性
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作者单位: Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, Edmonton, Alberta, Canada
Recommended Citation:
Pinno B.D.,Errington R.C.,Thompson D.K.. Young jack pine and high severity fire combine to create potentially expansive areas of understocked forest[J]. Forest Ecology and Management,2013-01-01,310