DOI: 10.1016/j.foreco.2015.07.014
Scopus记录号: 2-s2.0-84945476909
论文题名: The effect of species, size, failure mode, and fire-scarring on tree stability
作者: Cannon J.B. ; Barrett M.E. ; Peterson C.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 356 起始页码: 196
结束页码: 203
语种: 英语
英文关键词: Disturbance interactions
; Fire scar
; Tree stability
; Wind resistance
; Wood strength
Scopus关键词: Bridge cables
; Fire resistance
; Fires
; Hardwoods
; Sensitivity analysis
; Stability
; Surveys
; Fire scars
; Interspecific differences
; Liriodendron tulipifera
; Predictor variables
; Sensitive parameter
; Tree stability
; Wind resistance
; Wood strength
; Forestry
; coniferous tree
; deciduous tree
; disturbance
; fire
; interspecific variation
; piedmont
; range size
; sensitivity analysis
; size
; survey method
; wind forcing
; Georgia
; United States
; Coniferophyta
; Liriodendron tulipifera
; Pinus taeda
英文摘要: Understanding of wind disturbance remains predominantly at a phenomenological rather than a mechanistic or predictive level. Although wind-damage surveys in forests have identified broad trends among species, sizes, and stand structures, most of these variables are unavoidably confounded in descriptive studies. To provide improved insights into the impacts of wind on forests, static winching studies allow direct measurement of wind resistance with minimal confounding of potentially influential tree features. Here we report results from a static winching study of loblolly pine (. Pinus taeda) and tulip poplar (. Liriodendron tulipifera) on the Georgia Piedmont. This study is one of only a few that directly compares tree stability (and by extension, windfirmness) between two species across a wide size range, and is apparently only the second to directly compare a conifer to a hardwood species. Because previous fires scarred some of the trees, we opportunistically recorded fire scar presence and size along with the primary predictor variables of tree size and species. Because the calculation of critical turning moment - an indication of tree stability - relies on several field measurements that are often estimated, we included a sensitivity analysis to determine the most sensitive parameters in the calculation of critical turning moment. Our analysis of critical turning moments of winched trees revealed that tree stability increased with tree size. Surprisingly, critical turning moment did not differ between species. Moreover, fire scars were associated with a non-significant trend toward reduced tree stability, a trend that may have been significant with a larger sample size. These findings suggest that interspecific differences in tree damage documented by post-event damage surveys may be due more to variation in wind load among trees, than to innate interspecific differences in tree windfirmness. © 2015 Elsevier B.V.. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65302
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Plant Biology, University of Georgia, Athens, GA, United States; Odum School of Ecology, University of Georgia, Athens, GA, United States
Recommended Citation:
Cannon J.B.,Barrett M.E.,Peterson C.J.. The effect of species, size, failure mode, and fire-scarring on tree stability[J]. Forest Ecology and Management,2015-01-01,356