DOI: 10.1016/j.foreco.2013.03.013
Scopus记录号: 2-s2.0-84876800614
论文题名: Dynamics of coarse woody debris following wildfire in a mountain hemlock (Tsuga mertensiana) forest
作者: Acker S.A. ; Kertis J. ; Bruner H. ; O'Connell K. ; Sexton J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 302 起始页码: 231
结束页码: 239
语种: 英语
英文关键词: CWD mass
; Fire severity
; Snag persistence
Scopus关键词: Coarse woody debris
; CWD mass
; Fire severity
; Mixed effects models
; Mountain hemlocks
; Optimal temperature
; Pacific Northwest
; Snag persistence
; Landforms
; Probability
; Reforestation
; Fires
; coarse woody debris
; coniferous forest
; coniferous tree
; elevation
; forest ecosystem
; fuelwood
; persistence
; probability
; regeneration
; snag
; wildfire
; Cascade Range
; Oregon
; Pacific Northwest
; United States
; Coniferophyta
; Conium
; Tsuga
; Tsuga mertensiana
英文摘要: Coarse woody debris (CWD, comprised of snags and downed logs) is an important component of the structure and function of forest ecosystems, one which both influences the availability of fuel for wildfires and can be a result of wildfires. We studied snag persistence, and changes in mass of CWD in 10. years following a 1996 wildfire in mountain hemlock (Tsuga mertensiana (Bong.) Carrière) forest in the Cascade Range of Oregon, comparing unburned areas to areas with varying fire severity. Though mountain hemlock forest is a dominant type at high elevations in the Pacific Northwest, previous studies have not addressed the species. From studies of other conifers in western North America, we hypothesized that probability of snag persistence would be >75% 5. years and <50% 10. years after fire, and would increase with tree size. We modeled snag persistence on characteristics of the snags and the plots on which they occurred, using generalized mixed effects models. Probability of snag persistence was >75% 5. years after fire and increased with increasing tree diameter, as predicted. However, probability of persistence was >50% 10. years after fire. The cold climate, with a brief interval of optimal temperatures for decay organisms, probably contributed to prolonged snag persistence. Although probability of snag persistence remained high, estimated mass of snags declined and estimated mass of logs increased. Both breakage of snags and decreasing wood density due to advancing decay contributed to the decrease in estimated snag mass. Due to the nearly complete transformation of live trees to snags and the paucity of tree regeneration, we expect that patches of high fire severity will be effective barriers to the spread of crown fires for decades. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66541
Appears in Collections: 影响、适应和脆弱性
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作者单位: Olympic National Park, 600 E. Park Avenue, Port Angeles, WA 98362, United States; Siuslaw National Forest, 4077 SW Research Way, Corvallis, OR 97339, United States; Oregon State University, Corvallis, OR 97331, United States; Dynamac Corporation, USEPA Contractor Western Ecology Division, 200 SW35th Street, Corvallis, OR 97333, United States
Recommended Citation:
Acker S.A.,Kertis J.,Bruner H.,et al. Dynamics of coarse woody debris following wildfire in a mountain hemlock (Tsuga mertensiana) forest[J]. Forest Ecology and Management,2013-01-01,302