DOI: 10.1016/j.foreco.2016.09.010
Scopus记录号: 2-s2.0-84988000721
论文题名: Variability in vegetation and surface fuels across mixed-conifer-dominated landscapes with over 40 years of natural fire
作者: Collins B.M. ; Lydersen J.M. ; Fry D.L. ; Wilkin K. ; Moody T. ; Stephens S.L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 381 起始页码: 74
结束页码: 83
语种: 英语
英文关键词: Fire regime
; Forest restoration
; Heterogeneity
; Managed fire
; Reference conditions
Scopus关键词: Conservation
; Fires
; Fuels
; Repair
; Restoration
; Vegetation
; Fire regimes
; Forest restoration
; Heterogeneity
; Historical reconstruction
; Reference condition
; Restoration programs
; Statistical relationship
; Vegetation structure
; Forestry
; basal area
; coniferous forest
; environmental restoration
; fire history
; forest fire
; forest management
; heterogeneity
; landscape ecology
; measurement method
; mixed forest
; vegetation structure
; California
; Sierra Nevada [California]
; United States
; Coniferophyta
英文摘要: Studies of historical fire and vegetation conditions in dry conifer forests have demonstrated a high degree of heterogeneity across landscapes. However, there is a limit to the amount of inference that can be drawn from historical fire reconstructions. Contemporary “reference” landscapes may be able to provide information that is not available from historical reconstructions. In this study, we characterized variability in vegetation structure and composition across two Sierra Nevada landscapes with long-established fire restoration programs. We used tree, shrub, and surface fuel data from 117 initial plots, 86 of which were re-measured 8–12 years later, to identify the mechanisms driving variability in vegetation and fuel conditions. Our analyses identified nine distinct vegetation groups, with mean live tree basal area and density ranging from 0.3 to 72.7 m2 ha−1 and 2.5 to 620 trees ha−1 for individual groups. For all plots combined, mean live tree basal area and density was 28.4 m2 ha−1 and 215 trees ha−1, but standard deviations (SD) were 29.1 m2 ha−1 and 182 trees ha−1, respectively. These ranges and SDs demonstrate considerable variability in vegetation structure, which was partially related to site productivity and previous fire severity. Fine surface fuel loads were generally low (overall mean, 16.1 Mg ha−1), but also exhibited high variability (SD, 12.6 Mg ha−1). Surprisingly, surface fuel loads based on initial measurement and change between measurements were not related to fire characteristics. The only statistical relationship found was that surface fuel loads were associated with forest structure and composition. These results capture a contemporary ‘natural’ range of variability and can be used to guide landscape-level restoration efforts. More specifically, these results can help identify distinct targets for variable forest structures across landscapes. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64672
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, Davis, CA, United States; Center for Fire Research and Outreach, University of California, Berkeley, CA, United States; Ecosystem Sciences Division, Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, United States; California Department of Forestry and Fire Protection, Fire and Resource Assessment Program, Sacramento, CA, United States
Recommended Citation:
Collins B.M.,Lydersen J.M.,Fry D.L.,et al. Variability in vegetation and surface fuels across mixed-conifer-dominated landscapes with over 40 years of natural fire[J]. Forest Ecology and Management,2016-01-01,381