DOI: 10.1016/j.foreco.2014.03.051
Scopus记录号: 2-s2.0-84899104984
论文题名: Branch models for white spruce (Picea glauca (Moench) Voss) in naturally regenerated stands
作者: Sattler D.F. ; Comeau P.G. ; Achim A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 325 起始页码: 74
结束页码: 89
语种: 英语
英文关键词: Branch characteristics
; Generalized mixed models
; Naturally regenerated stands
; White spruce
Scopus关键词: Ecology
; Forestry
; Branch characteristics
; Branching characteristics
; Canadian boreal forest
; Diameter-at-breast heights
; Mixed models
; Significant variables
; Stand-level variables
; White spruce
; Reforestation
; boreal forest
; deciduous forest
; forestry modeling
; growth rate
; light availability
; regeneration
; stand structure
; yield response
; Ecology
; Forests
; Picea Engelmannii
; Reforestation
; Canada
英文摘要: To describe the branching characteristics of white spruce trees (. Picea glauca [Moench] Voss) in naturally regenerated, pure and mixed-species stands of the Canadian boreal forest, predictive models were developed for: (1) the number of branches (≥5. mm diameter), (2) maximum branch diameter, (3) the diameter of all other branches, and (4) the angle of branch insertion (≥5. mm diameter). An additional set of equations were developed for models (1) and (4) for branches ≥12.5. mm in diameter in order to evaluate the factors affecting the recovery of No 1 grade cut lumber. Tree and stand-level variables common to distance independent growth and yield simulators were tested in the models and a generalized hierarchical mixed-effect approach was used to estimate the parameters. Estimates for the branch characteristic were obtained for 1. m sections of the live crown since distinct branch whorls were unidentifiable. The relative or absolute depth into the crown (m) were significant variables in all the models, reflecting the importance of branch age and diminishing light levels with increasing crown depth. Increasing social position within a stand, measured by the basal area of larger trees (Bal), was positively related to an increase in the number of branches ≥5. mm per section but did not significantly influence the number of branches ≥12.5. mm, which was more strongly related to crown length and tree slenderness (ratio of height to diameter at breast height). Crown length was a significant variable affecting maximum branch diameters, whereas tree slenderness was important for the diameter of all other branches. The rank of a branch relative to the largest branch within a 1. m stem section was related to the diameter of smaller branches, angle of insertion for branches ≥5. mm as well as branches ≥12.5. mm. No species composition or explicit stand-level variables (other than Bal) were significant in any of the models. Within many of the models, the presence of tree-level variables which are known to be sensitive to changes in competition and tree social status suggest that branch characteristics for white spruce within pure and mixed-species stands of the boreal forest are affected by local changes in light availability. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65929
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Renewable Resources, University of Alberta, 751 General Services Building, Edmonton, AB T6G 2H1, Canada; Department of Forest Resources Management, University of Alberta, 751 General Services Building, Edmonton, AB T6G 2H14, Canada; Département des sciences du bois et de la forêt, Faculté de foresterie, de géographie et de géomatique, Université Laval, 2425, rue de la Terrasse, Pavillon Gene-H.-Kruger, Québec, QC G1V 0A6, Canada
Recommended Citation:
Sattler D.F.,Comeau P.G.,Achim A.. Branch models for white spruce (Picea glauca (Moench) Voss) in naturally regenerated stands[J]. Forest Ecology and Management,2014-01-01,325