Effects of local neighbourhood diversity on crown structure and productivity of individual trees in mature mixed-species forests

作     者：Louis Georgi Matthias Kunz Andreas Fichtner Karl Friedrich Reich Anne Bienert Hans-Gerd Maas Goddert von Oheimb Louis Georgi;Matthias Kunz;Andreas Fichtner;Karl Friedrich Reich;Anne Bienert;Hans-Gerd Maas;Goddert von Oheimb

作者机构：Technische Universität DresdenInstitute of General Ecology and Environmental ProtectionPienner Straße 701737 TharandtGermany Leuphana University of LüneburgInstitute of EcologyUniversitätsallee 121335 LüneburgGermany Technische Universität DresdenInstitute of Photogrammetry and Remote SensingHelmholtzstraße 1001069 DresdenGermany 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2021年第8卷第2期

页      面：345-356页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 0829[工学-林业工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：LG was funded by the German Research Foundation(DFG 320926971)through the project“Analysis of diversity effects on above-groundproductivity in forests:advancing the mechanistic understanding of spatiotemporal dynamics in canopy space filling using mobile laser scanning” 

主　　题：Biodiversity Tree growth Crown architecture Quantitative structure models Terrestrial laser scanning Neighbour classification 

摘      要：Background:Species-specific genotypic features,local neighbourhood interactions and resource supply strongly influence the tree stature and growth *** mixed-species forests,diversity-mediated biomass allocation has been suggested to be a fundamental mechanism underlying the positive biodiversity-productivity *** evidence,however,is rare about the impact of local neighbourhood diversity on tree characteristics analysed at a very high level of *** address this issue we analysed these effects on the individual-tree crown architecture and tree productivity in a mature mixed forest in northern ***:Our analysis considers multiple target tree species across a local neighbourhood species richness gradient ranging from 1 to *** applied terrestrial laser scanning to quantify a large number of individual mature trees(N=920)at very high *** evaluated two different neighbour inclusion approaches by analysing both a fixed radius selection procedure and a selection based on overlapping *** and conclusions:We show that local neighbourhood species diversity significantly increases crown dimension and wood volume of target ***,we found a size-dependency of diversity effects on tree productivity(basal area and wood volume increment)with positive effects for large-sized trees(diameter at breast height(DBH)40 cm)and negative effects for small-sized(DBH40 cm)*** our analysis,the neighbour inclusion approach has a significant impact on the *** scientific studies and the validation of growth models we recommend a neighbour selection by overlapping crowns,because this seems to be the relevant scale at which local neighbourhood interactions *** local neighbourhood diversity promotes individual-tree productivity in mature European mixed-species forests,we conclude that a small-scale species mixture should be considered in management plans.