DOI: 10.1016/j.foreco.2013.07.057
Scopus记录号: 2-s2.0-84883031015
论文题名: Influence of competition and age on tree growth in structurally complex old-growth forests in northern Minnesota, USA
作者: Aakala T. ; Fraver S. ; D'Amato A.W. ; Palik B.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 308 起始页码: 128
结束页码: 135
语种: 英语
英文关键词: Forest dynamics
; Mixed effects model
; Multiplicatively weighted Voronoi diagram
; Natural forest
; Pinus resinosa
; Pinus strobus
Scopus关键词: Forest dynamics
; Mixed effects models
; Natural forests
; Pinus resinosa
; Pinus strobus
; Weighted voronoi diagram
; Computational geometry
; Graphic methods
; Population statistics
; Resins
; Forestry
; age class
; coniferous forest
; ecological modeling
; forest dynamics
; forest ecosystem
; growth rate
; interspecific competition
; old-growth forest
; plant community
; stand structure
; Computation
; Forests
; Geometry
; Pinus Resinosa
; Pinus Strobus
; Minnesota
; United States
英文摘要: Factors influencing tree growth in structurally complex forests remain poorly understood. Here we assessed the influence of competition on Pinus resinosa (n= 224) and Pinus strobus (n= 90) growth in four old-growth stands in Minnesota, using mixed effects models. A subset of trees, with accurate age estimates, was used to further test the influence of tree age. Our analyses included the weighted Voronoi diagram (WVD) as a novel competition index, representing a detailed description of the spatial structure of a tree's neighborhood.Competition was variably expressed depending on stand developmental history and tree species. For P. resinosa in single-cohort stands, and P. strobus in multi-cohort stands, tree size relative to the population mean size best predicted tree growth. In contrast, for P. resinosa in multi-cohort stands, the spatial configuration of competitors became important, as shown by the superior performance of the WVD index. Surprisingly, while tree age had a negative influence on growth, it did not influence the intensity of competition.Our results highlight the importance of considering stand developmental history and tree age in analyses of tree growth and competition, and the potential for improving assessments of competition in complex stands, using detailed quantification of neighborhood structure. © 2013 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66368
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Resources, University of Minnesota, 115 Green Hall, 1530 Cleveland Ave N, St. Paul, MN 55108, United States; Northern Research Station, US Forest Service, 1831 Hwy 169 East, Grand Rapids, MN 55744, United States
Recommended Citation:
Aakala T.,Fraver S.,D'Amato A.W.,et al. Influence of competition and age on tree growth in structurally complex old-growth forests in northern Minnesota, USA[J]. Forest Ecology and Management,2013-01-01,308