DOI: 10.1016/j.foreco.2015.03.019
Scopus记录号: 2-s2.0-84928019920
论文题名: Mechanical abrasion, and not competition for light, is the dominant canopy interaction in a temperate mixed forest
作者: Hajek P. ; Seidel D. ; Leuschner C.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 348 起始页码: 108
结束页码: 116
语种: 英语
英文关键词: Branch morphology
; Canopy space exploration
; Crown shyness
; Interspecific competition
; Laser scanning
; Mechanical interaction
Scopus关键词: Abrasion
; Dynamics
; Mechanisms
; Space research
; Crown shyness
; Inter-specific competitions
; Laser scanning
; Mechanical interactions
; Space explorations
; Forestry
; abrasion
; canopy gap
; forest management
; interspecific competition
; light availability
; mixed forest
; old-growth forest
; Competition
; Forest Canopy
; Lasers
; Scanning
; Carpinus
; Carpinus betulus
; Fagus
; Fagus sylvatica
; Fraxinus
; Fraxinus excelsior
; Tilia
; Tilia cordata
英文摘要: Competition for canopy space is a key process in forest dynamics, but the underlying mechanisms are not well understood in old-growth forests.We combined laser-based canopy structural analysis and length-increment measurements of canopy branches for studying lateral and vertical crown expansion in four temperate broad-leaved tree species (Fagus sylvatica, Fraxinus excelsior, Carpinus betulus, Tilia cordata) in an old-growth temperate mixed forest. Using a 30. m-tall mobile canopy lift for accessing the canopy contact zone between different pairs of species, we were able to analyse the growth dynamics of more than 230 branches in their dependence on local light availability and neighbour species identity. The minimum distance between neighbouring crowns (crown shyness) was also determined for different species pairs.Contrary to expectation, lateral branch increment in the contact zone was not dependent on light availability for three species; a positive relationship existed only for Fraxinus. More than 50 percent of the lateral branches of Fagus, Carpinus and Tilia were broken due to mechanical abrasion at least once within the last six years prior to our measurements (2006-2011). Only the thicker more robust branches of Fraxinus showed minor damages. Mechanical interaction in allospecific neighbourhood was highly asymmetric for the species combinations Fraxinus-Tilia, Fraxinus-Carpinus, Fagus-Tilia, and partly asymmetric in the pair Fraxinus-Fagus (lower damage in the respective first species). Crown shyness was highest in the Fagus-Fraxinus neighbourhood (average minimum distance: 1.0 m), intermediate in Carpinus-Fagus pairs (0.6 m), and low in Fagus-Fagus (0.2 m) and Fagus-Tilia pairs (0 m; direct contact).We conclude that the dynamics of lateral canopy expansion in this mixed forest are mainly determined by mechanical interactions and not by competition for light. Interactions were in many cases asymmetric and depended on the species. This has important implications for forest dynamics modelling and forest management in mixed stands. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65429
Appears in Collections: 影响、适应和脆弱性
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作者单位: Plant Ecology and Ecosystems Research, Albrecht von Haller Institute for Plant Sciences, University of Göttingen, Untere Karspüle 2, Göttingen, Germany; Department of Forest Ecosystems and Society, College of Forestry, Oregon State University, Corvallis, OR, United States
Recommended Citation:
Hajek P.,Seidel D.,Leuschner C.. Mechanical abrasion, and not competition for light, is the dominant canopy interaction in a temperate mixed forest[J]. Forest Ecology and Management,2015-01-01,348