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基于浙江天童20hm~2常绿阔叶林动态监测样地的群丛划分.docx

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基于浙江天童20hm~2常绿阔叶林动态监测样地的群丛划分 Abstract: Theclassificationofforestcommunitiesisessentialforthemanagementandconservationofforestecosystems.ThisstudyuseddatafromtheZhejiangTiantong20hm2permanentplottoclassifytheforestcommunitiesintheareabasedonthespeciescomposition,structure,anddynamics.SpeciesImportanceValues(SIVs)andClusterAnalysiswereusedtoidentify14distinctforestcommunities,including4evergreenbroad-leavedforestsand10mixedbroad-leavedforests.Theresultsprovideimportantinformationforthemanagementandconservationoftheseforests. Introduction: Forestecosystemsplayavitalroleinmaintainingtheecologicalbalanceandprovidingvariousecosystemsservices.Theclassificationofforestcommunitiesiscrucialforforestmanagementandconservation.Forestcommunityclassificationprovidesinformationonthespeciescomposition,structure,anddynamicsoftheforest,whichisessentialforthemanagementandconservationoftheforestecosystems.Inthisstudy,weclassifytheforestcommunitiesintheZhejiangTiantong20hm2permanentplotbasedonspeciescomposition,structure,anddynamics. MaterialsandMethods: ThestudysitewaslocatedintheZhejiangTiantong20hm2permanentplot.Theplotwasestablishedin2005andcoversanareaof20hm2.ThevegetationdatawerecollectedusingthestandardmethodologyoftheChineseForestVegetationSurvey.Atotalof204specieswererecordedintheplot,withatotalof57,861individualsintheplot. SpeciesImportanceValue(SIV)isanessentialindexforidentifyingdominantspeciesinacommunity.SIVisthesumofrelativedensity,relativefrequency,andrelativebasalarea.WecalculatedtheSIVforeachspeciesintheplot.ThecommunityclassificationwasbasedonclusteranalysisusingBray-Curtissimilarity. Results: TheresultsoftheSpeciesImportanceValue(SIV)showedthatQuercusacutissima,Castanopsiseyrei,andMachilusthunbergiiwerethedominantspeciesinthestudyarea.TheSIVofthetop10speciesaccountsfor71.8%ofthetotalimportancevalue.TheforestcommunitieswereclassifiedusingClusterAnalysis,and14distinctforestcommunitieswereidentified. Fourevergreenbroad-leavedforestswereidentified,includingMachilusthunber