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Impact of tree diversity and environmental conditions on the survival of shrub species in a forest biodiversity experiment in subtropical China

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Journal of Plant Ecology 2017年第1期10卷 179-189页

作者： Bo Yang Ying Li Bingyang Ding Sabine Both Alexandra Erfmeier Werner Härdtle Keping Ma Bernhard Schmid Thomas Scholten Gunnar Seidler Goddert von Oheimb Xuefei Yang Helge Bruelheide Institute of Biology/Geobotany and Botanical Garden Martin Luther University Halle-WittenbergAm Kirchtor 106120 HalleGermany Key Laboratory of Speciality Plant Resources of Jiangxi Province Jingdezhen University838 Cidu AvenueJingdezhenJiangxi 333000China Faculty of Sustainability Institute of EcologyLeuphana University LüneburgScharnhorststr 121335 LüneburgGermany College of Life and Environmental Sciences Wenzhou UniversityWenzhouZhejiang 325035China Institute of Biological and Environmental Sciences University of Aberdeen23 St Machar DriveAberdeen AB243UUUK Institute for Ecosystem Research GeobotanyKiel UniversityOlshausenstr 7524118 KielGermany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences20 NanxincunXiangshanBeijing 100093China Institute of Evolutionary Biology and Environmental Studies University of ZürichWinterthurerstr 1908057 ZürichSwitzerland Department of Geosciences Chair of Soil Science and GeomorphologyEberhard Karls University TübingenRümelinstraße19-23D-72070 TübingenGermany Technische Universität Dresden Institute of General Ecology and Environmental ProtectionPienner Straße 701737 TharandtGermany Key Laboratory of Biodiversity and Biogeography Kunming Institute of BotanyCAS KunmingKunming 650201China

Aims Although shrubs are an important component of forests,their role has not yet been considered in forest biodiversity *** the biodiversity-ecosystem functioning(BEF)experiment with subtropical tree species in south-east China(BEF-China),we factorially combined tree with shrub species-diversity ***,we tested the hypotheses that shrub survival differs between the 10 planted shrub species,with lower survival rates of late-than early-successional species and is affected by environmental conditions,such as topography and top soil characteristics,as well as by biotic factors,represented by tree,shrub and herb layer *** We analyzed the survival of 42000 shrub individuals in 105 plots varying in tree and shrub species richness of the BEF-China project four years after *** survival was analyzed with generalized linear mixed effects models at the level of individuals and with variance partitioning at the plot *** intercept and random slope models of different explanatory variables were compared with respect to the Bayesian Information Criterion(BIC).Important Findings Survival rates differed largely between the 10 shrub species,ranging from 26%to 91%for Ardisia crenata and Distylium buxifolium,*** of species identity,single abiotic factors explained up to 5%of species survival,with a negative effect of altitude and slope inclination and a positive effect of the topsoil carbon to nitrogen ratio,which pointed to drought as the major cause of shrub *** contrast,neither tree nor shrub richness affected shrub survival at this early stage of the *** the biotic predictors,only herb layer species richness and cover of the dominant fern species(Dicranopteris pedata)affected shrub ***,our models that included all variables could explain about 65%in shrub survival,with environmental variables being most influential,followed by shrub species identity,while tree speci

关键词： BEF-China biodiversity-ecosystem functioning experiment forest herb layer plant survival shrub species richness

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