:湖南省南岳原生性森林群落的研究-Ⅲ长叶石栎林(1湖南环境生物学院,湖南衡阳421005)(2南岳树木园,湖南衡阳421100)摘要湖南省南岳原生性森林群落长叶石栎林是一种尚未报道过的群落新类型,即长叶石栎+多脉青冈-尾叶山茶-求米草群丛(AssociationofLithocarpushenryi+Cyclobalanopsismultinervis-Camelliacaudata-Oplismenusundulatifolius),属于典型的常绿落叶阔叶林。该群落属的区系成分主要是北温带和泛热带2种分布区类型,其中温带性质成分占主体;而种的区系成分主要是华夏、东亚、华东-华中3种分布式样,具有华东－华中区系的过渡交替色彩。群落可以明显分为乔木层、灌木层和草本层,其中乔木层又可分为2个亚层,该群落能稳定相当一段时间，更新演替过程中虽然会保持常绿落叶阔叶林性质,但其优势种可能被尾叶山茶、多脉青冈等树种取代。该群落物种多样性水平接近季雨林与稀树草原之间的水平;Shannon-Weaver、Brillouin和McIntosh等3个多样性指数及其对应的均匀度指数可能适合研究群落物种多样性;在研究群落物种多样性时必须要多用一些公式进行测定才可能避免出现错误的结果。不同的物种相对多度分布格局模型在拟合群落不同层次时其结果并不一致。关键词长叶石栎林;原生性森林群落;新类型;区系特点;层次结构;更新演替;物种多样性;物种相对多度分布格局;南岳:Q948.15文献标识码:ASTUDYONORIGINALFORESTCOMMUNITYINNANYUEOFHUNANPROVINCE-Ⅲ.LITHOCARPUSHENRYIFORESTZuo激afu1,ZhuXun1,TianWeizheng1,PengDaiwen1,LiMinghong2(1HunanEnvironment-BiologicalPolytechnic,Hengyang421005Hunan)(2NanyueArboretum,Hengyang421100Hunan)Abstract：AccordingtotheinvestigationandresearchoftheLithocarpushenryiforestinNanyue,Hunanprovince,thiscommunityisanewtypethatithasn’tbeenreported,itcanbecalledAssociationofLithocarpushenryi+Cyclobalanopsismultinervis-Camelliacaudata-Oplismenusundulatifoliusanditisbelongedtotheevergreeanddeciduousbroad-leavedmixedforest.Thereare73species,64generaand44familiestobelongtothevascularplantinthecommunity.Thetemperateelementsofthefloristicgenerainthecommunityoccupies53.45%ofthetotal,butthetropicalone46.55%.ThefloristicelementsofspeciesinthecommunityaremainlyCathaysian,EastAsiaandEastChina-CentralChinawhichoccupy25.35%,22.53%and12.68%ofthetotalrespectively.IthasveryobviousthatitcrossbetweenthefloisticelementsofEastChinaandCentralChinaofthespeciesofthecommunity.The---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---woodplantsinthecommunityoccupy80.39%ofthetotal,buttheherb19.61%.Thecommunitycanbedividedthearborlayerthatitcanbedivided2sublayer,shrublayerandherblayer.Itstillkeeptheevergreenanddeciduousbroad-leavedmixedforest,butitsdominantspeciesi.e.LithocarpushenryiwillprobablyreplacedbyCamelliacaudataorCyclobalanopsismultivervisandsoon.Theresultsshowthattheplantspeciesdiversityofthecommunityishigher,andthatitsvalueapproachesthespeciesdiversitybetweenSeasonalrainforestandSavannas,andthattheindicesofShannon-Weaver,Brillouin,McIntoshandtheirEvennesscanbesuitedforstudyingtheplantspeciesdiversityofthecommunity,andthatthevalueshavenottheobviouslawbyusingdifferdntmeasurementdegreetocalculatetheindicesofspeciesdiversity.WechoosetheGeometricseriesdistribution,Broken-stick,LogseriesdistributionandLognormaldistributiontostudythedistributionalpatternofspeciesrelativeabundanceofthecommunity,theresultsshowthattheGeometricseriesdistributionalmodelissuitableforimitatingthearborandherblayer,butisn’ttheshrublayer,andthatBroken-stickmodelisonlysuitableforimitatingthearborlayer,andthatAbundance-FrequencymodelofBroken-stickissuitableforimitatingtheherblayer,andthatLogse...