DOI: 10.1016/j.foreco.2014.12.028
Scopus记录号: 2-s2.0-84921320517
论文题名: The effects of topographic variation and the fire regime on coarse woody debris: Insights from a large wildfire
作者: Bassett M. ; Chia E.K. ; Leonard S.W.J. ; Nimmo D.G. ; Holland G.J. ; Ritchie E.G. ; Clarke M.F. ; Bennett A.F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 340 起始页码: 126
结束页码: 134
语种: 英语
英文关键词: Fire interval
; Fire severity
; Log
; Snag
; Time since fire
; Topography
Scopus关键词: Debris
; Ecology
; Ecosystems
; Forestry
; Landforms
; Topography
; Fire intervals
; Fire prone ecosystems
; Fire severity
; Log
; Snag
; South-eastern Australia
; Terrestrial ecosystems
; Topographic positions
; Fires
; climate change
; coarse woody debris
; forest fire
; gully
; habitat management
; habitat quality
; habitat structure
; prescribed burning
; snag
; terrestrial ecosystem
; topographic effect
; wildfire
; Australia
; Ecosystems
; Forest Fires
; Logs
; Australia
英文摘要: Coarse woody debris (CWD) is a common structural component of terrestrial ecosystems, and provides important habitat for biota. Fires modify the distribution of CWD, both spatially and temporally. Changes in fire regimes, such as those arising from prescribed burning and changing climatic conditions, make it critical to understand the response of this resource to fire. We created a conceptual model of the effects of fire on logs and dead trees in topographically diverse forests in which trees often survive severe fire. We then surveyed paired sites, in a damp gully and adjacent drier slope, ~3.5. years after a large wildfire in south-eastern Australia. Sites were stratified by fire severity (unburnt, understorey burnt and severely burnt), and fire history (burnt ≤3. years or ≥20. years prior to the wildfire). Both components of the fire regime influenced CWD availability in gullies. Severe wildfire and fire history ≤3. years reduced the volume of small logs (10-30. cm diameter) in gullies, while severe wildfire increased the number of large dead trees in gullies. CWD on slopes was not affected by fire severity or history at ~3.5. years post-fire. Log volumes on slopes may recover more quickly after wildfire through rapid collapse of branches and trees. Gullies generally supported more logs than slopes, but longer inter-fire intervals in gullies may allow fuel loads to accumulate and lead to comparatively larger fire impacts. Given that fire severity and fire interval are predicted to change in many fire-prone ecosystems in coming decades, this study highlights the importance of understanding the interacting effects of multiple components of the fire regime with landscape structure. In particular, variation in fire interval and fire severity in relation to topographic position will influence the pattern of accumulation of coarse woody debris across the landscape, and therefore the structure and quality of habitats for biota. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65552
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Life and Environmental Sciences and Centre for Integrative Ecology, Deakin University, Burwood, VIC, Australia; Department of Ecology, Environment and Evolution, La Trobe UniversityVIC, Australia; Department of Ecology, Environment and Evolution, La Trobe UniversityVIC, Australia
Recommended Citation:
Bassett M.,Chia E.K.,Leonard S.W.J.,et al. The effects of topographic variation and the fire regime on coarse woody debris: Insights from a large wildfire[J]. Forest Ecology and Management,2015-01-01,340