DOI: 10.1016/j.foreco.2012.08.044
Scopus记录号: 2-s2.0-84867237559
论文题名: Landscape-scale effects of fire severity on mixed-conifer and red fir forest structure in Yosemite National Park
作者: Kane V.R. ; Lutz J.A. ; Roberts S.L. ; Smith D.F. ; McGaughey R.J. ; Povak N.A. ; Brooks M.L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 287 起始页码: 17
结束页码: 31
语种: 英语
英文关键词: Fire severity
; Forest structure
; Gaps
; LiDAR
; Relativized differenced Normalized Burn Ratio (RdNBR)
; Yosemite
Scopus关键词: Fire severity
; Forest structure
; Gaps
; Relativized differenced Normalized Burn Ratio (RdNBR)
; Yosemite
; Fires
; Optical radar
; Sugars
; Forestry
; canopy gap
; coniferous forest
; coniferous tree
; fire behavior
; forest management
; height
; keystone species
; Landsat
; landscape
; lidar
; mixed forest
; satellite data
; stand structure
; Abies Magnifica
; Forest Fires
; Pinus Lambertiana
; Pinus Ponderosa
; Softwoods
; Sugar
; USA
; California
; United States
; Yosemite National Park
; Abies
; Abies grandis
; Abies magnifica
; Coniferophyta
; Pinus lambertiana
; Pinus ponderosa
英文摘要: While fire shapes the structure of forests and acts as a keystone process, the details of how fire modifies forest structure have been difficult to evaluate because of the complexity of interactions between fires and forests. We studied this relationship across 69.2km2 of Yosemite National Park, USA, that was subject to 32 fires ≥40ha between 1984 and 2010. Forests types included ponderosa pine (Pinus ponderosa), white fir-sugar pine (Abies concolor/Pinus lambertiana), and red fir (Abies magnifica). We estimated and stratified burned area by fire severity using the Landsat-derived Relativized differenced Normalized Burn Ratio (RdNBR). Airborne LiDAR data, acquired in July 2010, measured the vertical and horizontal structure of canopy material and landscape patterning of canopy patches and gaps. Increasing fire severity changed structure at the scale of fire severity patches, the arrangement of canopy patches and gaps within fire severity patches, and vertically within tree clumps. Each forest type showed an individual trajectory of structural change with increasing fire severity. As a result, the relationship between estimates of fire severity such as RdNBR and actual changes appears to vary among forest types. We found three arrangements of canopy patches and gaps associated with different fire severities: canopy-gap arrangements in which gaps were enclosed in otherwise continuous canopy (typically unburned and low fire severities); patch-gap arrangements in which tree clumps and gaps alternated and neither dominated (typically moderate fire severity); and open-patch arrangements in which trees were scattered across open areas (typically high fire severity).Compared to stands outside fire perimeters, increasing fire severity generally resulted first in loss of canopy cover in lower height strata and increased number and size of gaps, then in loss of canopy cover in higher height strata, and eventually the transition to open areas with few or no trees. However, the estimated fire severities at which these transitions occurred differed for each forest type. Our work suggests that low severity fire in red fir forests and moderate severity fire in ponderosa pine and white fir-sugar pine forests would restore vertical and horizontal canopy structures believed to have been common prior to the start of widespread fire suppression in the early 1900s. The fusion of LiDAR and Landsat data identified post-fire structural conditions that would not be identified by Landsat alone, suggesting a broad applicability of combining Landsat and LiDAR data for landscape-scale structural analysis for fire management. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66876
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Environmental and Forest Sciences, University of Washington, Box 352100, Seattle, WA 98195, United States; College of the Environment, University of Washington, Box 352100, Seattle, WA 98195, United States; U.S. Geological Survey, Western Ecological Research Center, Yosemite Field Station, El Portal, CA 95318, United States; Yosemite National Park, P.O. Box 577, Yosemite, CA 95389, United States; USDA Forest Service, Pacific Northwest Research Station, University of Washington, Box 352100, Seattle, WA 98195, United States; USDA Forest Service, Pacific Northwest Research Station, Wenatchee Forestry Sciences Laboratory, 1133 N. Western Ave., Wenatchee, WA 98801, United States
Recommended Citation:
Kane V.R.,Lutz J.A.,Roberts S.L.,et al. Landscape-scale effects of fire severity on mixed-conifer and red fir forest structure in Yosemite National Park[J]. Forest Ecology and Management,2013-01-01,287