DOI: 10.1016/j.foreco.2016.04.047
Scopus记录号: 2-s2.0-84966443154
论文题名: Response of sugar maple (Acer saccharum, Marsh.) tree crown structure to competition in pure versus mixed stands
作者: Olivier M.-D. ; Robert S. ; Fournier R.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 374 起始页码: 20
结束页码: 32
语种: 英语
英文关键词: Alpha shape
; Competition index
; Convex hull
; Crown plasticity
; Crown volume
; Structure-environment loop
Scopus关键词: Ecology
; Plasticity
; Seebeck effect
; Surveying instruments
; Wetlands
; Alpha-shapes
; Competition index
; Competitive pressure
; Convex hull
; Crown volume
; Developmental stage
; Surrounding environment
; Terrestrial laser scanning
; Forestry
; canopy architecture
; community composition
; competition (ecology)
; deciduous tree
; developmental stage
; environmental response
; index method
; mixed forest
; numerical method
; shape analysis
; volume
; Acer
; Acer saccharum
英文摘要: Characterizing tree crown structure and quantifying its relationships with the surrounding environment is of critical importance in forest ecology and management. These relationships depend heavily on species plasticity and local competition for light. It is however difficult to study forest canopies due to their inaccessibility and complexity. The objective of this study was thus to use terrestrial laser scanning (TLS) data to overcome the limits of traditional canopy studies and to quantify the differences in sugar maple (Acer saccharum, Marsh.) tree crowns between stands with different composition and developmental stage. A total of 72 sugar maple trees and their immediate surroundings were scanned using a TLS. We developed eight crown structure metrics and three competition indices using TLS data. We found that competitive pressure is higher in pure stands, when compared to mixed ones. Sugar maple crowns were bigger, less dense, and more sinuous and open in mixed stands. Moreover, differences between trees were generally more pronounced for trees in mature stands. Finally, TLS competition indices are better predictors of crown metric variability than stand type, highlighting the potential of TLS data to quantify tree competition and space occupancy. Our competition indices are good proxies of the canopy structure and thus seem promising to predict tree growth. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64856
Appears in Collections: 影响、适应和脆弱性
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作者单位: Chaire de recherche sur la forêt habitée, Département de biologie, chimie et géographie, Université du Québec à Rimouski (UQAR), 300 allée des Ursulines, Rimouski, QC, Canada; Centre d'Applications et de Recherches en Télédétection (CARTEL), Département de géomatique appliquée, Université de Sherbrooke, 2500, boul. de l'université, Sherbrooke, QC, Canada
Recommended Citation:
Olivier M.-D.,Robert S.,Fournier R.A.. Response of sugar maple (Acer saccharum, Marsh.) tree crown structure to competition in pure versus mixed stands[J]. Forest Ecology and Management,2016-01-01,374