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Relative effects of different leaf attributes on sapling growth in tropical dry forest

Journal of Plant Ecology 2014年第6期7卷 544-558页

作者： Ravi K.Chaturvedi A.S.Raghubanshi J.S.Singh Institute of Environment and Sustainable Development Banaras Hindu UniversityVaranasi 221005India Ecosystems Analysis laboratory Department of BotanyBanaras Hindu UniversityVaranasi 221005India

Aims Soil moisture content(SMC)influences establishment,survival and development of plant species and is considered as the most important limiting factor in tropical dry forest(TDF).In this study we attempt to establish the relationship between leaf attributes and of tree saplings in TDF and address the following questions:(i)how are the functional attributes of dominant tree saplings of TDF affected by seasonal changes in SMC at different habitats?,(ii)what is the relationship of functional attributes with each other?,(iii)how are the functional attributes and their plasticity affected by habitat con-ditions?and(iv)can the functional attributes in single or in com-bination predict the growth rate of tree saplings of TDF?The study was conducted on four sites(Hathinala,Gaighat,Harnakachar and Ranitali,listed in order of decreasing SMC)within the tropical dry deciduous forest in northern *** We analysed eight leaf attributes,specific leaf area(SLA);leaf dry matter content(LDMC);leaf nitrogen concentration(leaf N);leaf phosphorus concentration(leaf P);chlorophyll concentration(Chl);mass-based photosynthetic rate(Amass);mass-based stomatal con-ductance(Gsmass);intrinsic water use efficiency(WUEi)and three growth attributes,relative diameter increment(RDI);relative height increment(RHI);relative growth rate(RGR)of the 10 dominant tree saplings(viz.,Acacia catechu,Anogeissus latifolia,Boswellia serrata,Buchanania lanzan,Diospyros melanoxylon,Hardwickia binata,Lagerstroemia parviflora,Lannea coromandelica,Shorea robusta and Terminalia tomentosa)of a TDF and observed the effects of site,season and species for a period of 2 *** were selected in gradients of ***-wise multiple regression was performed to predict RDI,RHI and RGR from mean values of SMC and leaf *** Findings All the 11 attributes were interrelated and differed significantly among the 10 *** response varied across sites and *** the SMC g

关键词： tropical dry forest soil moisture content deciduousness tree saplings leaf attributes relative growth rate

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