气候变化领域集成服务门户(CCPortal): Tree species mixture effects on stem growth vary with stand density – An analysis based on individual tree responses

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DOI	10.1016/j.foreco.2020.118334
	Tree species mixture effects on stem growth vary with stand density – An analysis based on individual tree responses
	Brunner A.; Forrester D.I.
发表日期	2020
ISSN	0378-1127
卷号	473
英文摘要	Overyielding in mixed species stands is expected to vary with stand density, but only a few studies have quantified this. We used individual-tree growth data from permanent sample plots on 83 sites in Switzerland representing a three-species mixture between Norway spruce, Silver fir, and European beech. Basal area growth models for all three species indicated significant interactions between a competition index (CIs) and species composition in the neighborhood. The spatially-explicit CIs indicates stand density within a 10-m radius neighborhood, and the contribution of individual species to the CIs indicates the species composition. Given the rich vertical stand structure in the sample plots, which were often managed by single-tree selection cutting, it is not surprising that interactions between CIs and species proportion varied with relative tree height. We used the individual tree growth models to simulate stand growth with and without species composition effects. A sample plot with its real stand structure in terms of tree size and position was homogenized in terms of species composition at the tree level. By varying the stand density of this plot, we demonstrate how overyielding increases with stand density. In the given mixture, it is mostly beech contributing to the observed overyielding in dense mixed stands. Stand density therefore needs to be considered more explicitly when studying growth and yield of mixed species stands. © 2020 The Author(s)
英文关键词	Mixed species forests; Productivity; Stand density
语种	英语
scopus关键词	Composition effects; Mixtures; Structure (composition); Trees (mathematics); Basal area growth; Competition index; Individual tree growth models; Mixed-species stands; Permanent sample plots; Single-tree selection cutting; Spatially explicit; Species composition; Forestry; coniferous tree; deciduous tree; individual-based model; mixed forest; stand structure; stem; tree; yield; Cutting; Fagus Sylvatica; Forestry; Growth; Mixtures; Models; Stand Density; Tree Dimensions; Switzerland; Abies; Fagus; Fagus sylvatica; Picea abies
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155123
作者单位	Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Norway; Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zürcherstrasse 111, Birmensdorf, 8903, Switzerland
推荐引用方式 GB/T 7714	Brunner A.,Forrester D.I.. Tree species mixture effects on stem growth vary with stand density – An analysis based on individual tree responses[J],2020,473.
APA	Brunner A.,&Forrester D.I..(2020).Tree species mixture effects on stem growth vary with stand density – An analysis based on individual tree responses.Forest Ecology and Management,473.
MLA	Brunner A.,et al."Tree species mixture effects on stem growth vary with stand density – An analysis based on individual tree responses".Forest Ecology and Management 473(2020).