DOI: 10.1016/j.foreco.2012.09.022
Scopus记录号: 2-s2.0-84867345032
论文题名: Post-fire regeneration across a fire severity gradient in the southern Cascades
作者: Crotteau J.S. ; Morgan Varner J. ; Ritchie M.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 287 起始页码: 103
结束页码: 112
语种: 英语
英文关键词: Lassen National Forest
; Regeneration
; Seedlings
; Storrie Fire
; Vegetation dynamics
Scopus关键词: Abies spp
; Abiotic factors
; Burn Severity
; California , USA
; Conifer seedlings
; Conifer species
; Fire exclusion
; Fire severity
; Forest type
; Land managers
; National forests
; Post-fire
; Post-fire regenerations
; Regeneration
; Seedlings
; Stratified sampling design
; Tree diversity
; Tree regeneration
; Tree seedlings
; Vegetation dynamics
; Western United States
; Dynamics
; Fires
; Vegetation
; Reforestation
; coniferous tree
; fire behavior
; homogeneity
; overstory
; physiological response
; regeneration
; seedling
; seedling establishment
; shrub
; species diversity
; species evenness
; vegetation cover
; vegetation dynamics
; wildfire
; Forest Fires
; Forestry
; Plants
; Reforestation
; Seedlings
; USA
; California
; Cascade Range
; Lassen National Forest
; United States
; Abies
; Ceanothus
; Coniferophyta
英文摘要: Large scale, high-severity fires are increasing in the western United States. Despite this trend, there have been few studies investigating post-fire tree regeneration. We established a study in the footprint of the 2000 Storrie Fire, a 23,000. ha wildfire that occurred in northern California, USA. We used a stratified sampling design to quantify post-fire vegetation dynamics across four levels of burn severity and three forest types on the Lassen National Forest nine and ten years following fire. Within each sampled stand, we recorded tree seedlings, forest overstory, shrub cover, and abiotic factors hypothesized to influence growth and establishment.Median conifer seedling densities varied substantially by burn severity: 1918 seedlings ha-1 in the Unchanged units; 4838 seedlings ha-1 in the Low-severity units; 6484 seedlings ha-1 in the Medium-severity units; and 710 seedlings ha-1 in the High-severity units. Increased burn severity was associated with greater shrub coverage: shrub cover in High-severity burns was more than three times those of lower burn severities. We calculated Shannon's Species Diversity (H') and Pielou's Evenness (EH) indices to examine woody shrub and tree diversity. Abies spp. were by far the most abundant regenerating conifer species, which may be a concern for land managers; shrub cover after High-severity burns was dominated by Ceanothus spp. Although fir regeneration was prolific, the Storrie Fire generated diverse vegetative responses, potentially aiding in the reintroduction of the diverse landscape mosaic homogenized by a century of landscape-scale fire exclusion. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66879
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forestry and Wildland Resources, Humboldt State University, 1 Harpst Street, Arcata, CA 95521, United States; USDA, Forest Service Pacific Southwest Research Station, 3644 Avtech Parkway, Redding, CA 96002, United States
Recommended Citation:
Crotteau J.S.,Morgan Varner J.,Ritchie M.W.. Post-fire regeneration across a fire severity gradient in the southern Cascades[J]. Forest Ecology and Management,2013-01-01,287