DOI: 10.1016/j.foreco.2016.09.047
Scopus记录号: 2-s2.0-84994045363
论文题名: Tree regeneration, understory development, and biomass dynamics following wildfire in a mountain hemlock (Tsuga mertensiana) forest
作者: Acker S.A. ; Kertis J.A. ; Pabst R.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 384 起始页码: 72
结束页码: 82
语种: 英语
英文关键词: CWD mass
; Fire severity
; Snag attrition
; Understory vegetation
Scopus关键词: Biomass
; Carbon
; Ecology
; Fires
; Forestry
; Landforms
; Plants (botany)
; Vegetation
; Coarse woody debris
; CWD mass
; Ecological characteristics
; Fire severity
; Forested landscapes
; Snag attrition
; Understory vegetation
; Vegetation composition
; Reforestation
; biomass
; coarse woody debris
; coniferous tree
; growth response
; herb
; montane forest
; recruitment (population dynamics)
; regeneration
; shrub
; snag
; tree
; understory
; wildfire
; Oregon
; Pacific Northwest
; United States
; Coniferophyta
; Tsuga mertensiana
英文摘要: Processes initiated by wildfire largely determine ecological characteristics of forested landscapes in subsequent decades, including vegetation composition, habitat quality, carbon balance, and probability of fire recurrence. Post-fire biomass dynamics have rarely been observed directly for high-elevation forests of the Pacific Northwest. We examined changes in total biomass and its components (attrition of coarse woody debris (CWD), growth of shrubs and herbaceous plants, and tree recruitment) over the first 15 years following wildfire in a mountain hemlock (Tsuga mertensiana) forest in Oregon, using permanent plots representing random samples of four levels of fire-severity, from unburned to >90% tree mortality. Understory vegetation was transformed by fire, inasmuch as only shrubs were detected in unburned plots, while burned plots also had significant amounts of graminoids and forbs. Conifer recruitment was sparse in plots with high fire-severity two years after fire, but was abundant after 15 years. Recruitment was predominantly mountain hemlock and most were seedlings <1 m tall. The breakage of snags and resulting increase in logs created microsites (north sides of logs) conducive to tree regeneration. Mass of understory vegetation and conifer regeneration was far outweighed by CWD. Toppling, fragmentation, and advancing decay of snags resulted in a decrease in snag mass and an increase in log mass. The loss of snag mass exceeded the increase in log mass, resulting in an overall decline. For some portions of the burned area, particularly areas of high fire-severity, it may be more than a century before the growth of live trees balances the loss of mass of CWD. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64572
Appears in Collections: 影响、适应和脆弱性
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作者单位: Willamette National Forest, 3106 Pierce Parkway Suite D, Springfield, OR, United States; Siuslaw National Forest, 3200 SW Jefferson Way, Corvallis, OR, United States; Oregon State University, 321 Richardson Hall, Corvallis, OR, United States
Recommended Citation:
Acker S.A.,Kertis J.A.,Pabst R.J.. Tree regeneration, understory development, and biomass dynamics following wildfire in a mountain hemlock (Tsuga mertensiana) forest[J]. Forest Ecology and Management,2017-01-01,384