DOI: 10.1016/j.foreco.2014.06.005
Scopus记录号: 2-s2.0-84903648247
论文题名: Severity of an uncharacteristically large wildfire, the Rim Fire, in forests with relatively restored frequent fire regimes
作者: Lydersen J.M. ; North M.P. ; Collins B.M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 328 起始页码: 326
结束页码: 334
语种: 英语
英文关键词: Fire severity
; Forest resilience
; Frequent fire regime
; Interacting fires
; Mixed conifer forest
; Rim fire
Scopus关键词: Decision trees
; Forestry
; Fuels
; Meteorology
; Restoration
; Extreme weather conditions
; Fire regimes
; Fire severity
; Forest resilience
; High-severity fires
; Mixed-conifer forests
; Old-growth forest
; Yosemite National Park
; Fires
; climate conditions
; data set
; forest ecosystem
; index method
; old-growth forest
; restoration ecology
; topography
; vegetation cover
; wildfire
; Decision Making
; Forest Fires
; Fuels
; Meteorology
; Restoration
; California
; United States
; Yosemite National Park
英文摘要: The 2013 Rim Fire, originating on Forest Service land, burned into old-growth forests within Yosemite National Park with relatively restored frequent-fire regimes (≥2 predominantly low and moderate severity burns within the last 35. years). Forest structure and fuels data were collected in the field 3-4. years before the fire, providing a rare chance to use pre-existing plot data to analyze fire effects. We used regression tree and random forests analysis to examine the influence of forest structure, fuel, fire history, topographic and weather conditions on observed fire severity in the Rim Fire, as estimated from an initial fire severity assessment based on the relative differenced normalized burn ratio (RdNBR). Plots that burned on days with strong plume activity experienced moderate- to high-severity fire effects regardless of forest conditions, fire history or topography. Fire severity was also highly negatively associated with elevation, with lower severity observed in plots over 1700. m. Burning index (a composite index of fire weather), time since the last fire, and shrub cover had strong positive associations with fire severity. Plots that had experienced fire within the last 14. years burned mainly at low severity in the Rim Fire, while plots that exceeded that time since last fire tended to burn at moderate or high severity. This effect of time since last fire was even more pronounced on days when the burning index was high. Our results suggest that wildfire burning under extreme weather conditions, as is often the case with fires that escape initial attack, can produce large areas of high-severity fire even in fuels-reduced forests with restored fire regimes. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65850
Appears in Collections: 影响、适应和脆弱性
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作者单位: USDA Forest Service, Pacific Southwest Research Station, 1731 Research Park Dr., Davis, CA 95618, United States; John Muir Institute, University of California, One Shields Ave., Davis 95616, United States; Center for Fire Research and Outreach, University of California, Berkeley, Mulford Hall, Berkeley, CA 94720, United States
Recommended Citation:
Lydersen J.M.,North M.P.,Collins B.M.. Severity of an uncharacteristically large wildfire, the Rim Fire, in forests with relatively restored frequent fire regimes[J]. Forest Ecology and Management,2014-01-01,328