DOI: 10.1016/j.foreco.2013.11.004
Scopus记录号: 2-s2.0-84888396025
论文题名: Growth releases across a natural canopy gap-forest gradient in old-growth forests
作者: Stan A.B. ; Daniels L.D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 313 起始页码: 98
结束页码: 103
语种: 英语
英文关键词: Forest management
; Natural canopy gaps
; Pacific silver fir
; Radial growth
; Western hemlock
; Western redcedar
Scopus关键词: Silver
; Canopy gaps
; Radial growth
; Silver fir
; Western hemlock
; Western redcedar
; Forestry
; deciduous forest
; forest canopy
; forest management
; gap dynamics
; growth rate
; light availability
; old-growth forest
; transect
; Abies Amabilis
; British Columbia
; Forest Management
; Thuja Plicata
; Tsuga Heterophylla
; British Columbia
; Canada
; Abies
; Abies amabilis
; Conium
; Thuja
; Thuja plicata
; Tsuga
; Tsuga heterophylla
英文摘要: Canopy gaps created by the death of one to a few trees can exert a dominant influence on forest structure and composition by affecting the growth of nearby trees. Previous research in old-growth forests of coastal British Columbia, Canada indicated that most western redcedar (Thuja plicata Donn ex D. Don), western hemlock (Tsuga heterophylla (Raf.) Sarg.), and Pacific silver fir (Abies amabilis Dougl. ex J. Forbes) growing around, or within, 20 natural canopy gaps of known timing of origin experienced a release (i.e., abrupt increase in radial growth) following gap formation. In that study, tree diameter, growth rate prior to a release, species identity, and interactions between some of these variables influenced the duration and magnitude of releases. In this study, we use trees growing along north-south transects that extend through the 20 gaps and into the adjacent forest to clarify the influence of two additional variables on growth releases: tree distance from the gap center and tree north-south position relative to the gap center. For all trees, predicted duration and magnitude of releases showed a decreasing trend with increasing distance from the gap center. Interestingly, the effect of distance on predicted duration of releases was greater for trees north versus south of the gap center, suggesting a response to additional light availability north of the gap center. These findings, combined with those from our previous study, indicate a strong influence of canopy gaps on growth releases of nearby trees of varying sizes and species in our study area, even trees that extend into the surrounding forest matrix. Our results can help inform ecologically sustainable forest management approaches, including variable retention approaches that aim to emulate the fine-scale, low-intensity disturbances that dominate the wetter forests of coastal British Columbia. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66166
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Geography, University of British Columbia, 1984 West Mall, Vancouver, BC V6T 1Z2, Canada; Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Department of Geography, Planning and Recreation, Northern Arizona University, PO Box 15016, Flagstaff, AZ 86011, United States
Recommended Citation:
Stan A.B.,Daniels L.D.. Growth releases across a natural canopy gap-forest gradient in old-growth forests[J]. Forest Ecology and Management,2014-01-01,313