湖南省南岳原生性森林群落研究Ⅰ.甜槠林

为更好地了解南岳原生性森林群落，开展生物多样性研究，对南岳原生性森林群落甜槠林进行了调查研究，南岳自然森林植被计7个植被型21个群系，甜槠林是南岳原生性森林群落之一，可命名为甜槠－花竹＋云和新木姜子－淡竹叶＋莎草群丛，是一种尚未报道过的群落类型；群落属的区系成分主要是是泛热带和北温带两种分布区类型，而种的区系成分主要以华夏、东亚和华东－华中3种分布式样为主；群落木本植物占绝对多数；群落明显分为乔木、灌木和草本3个层次；甜槠林在长期演替过程中虽然能够保持常绿阔叶林的性质，但其优质种槠可能被云和新木姜子、黄丹木姜子等取代，并提出了一种新方法即综合值方法来确定群落更新树种的作用与重要性。

Original Forest Community in Nanyue of Hunan Province Ⅰ.Castanopsis eyeri Forest

To study the original forest community and biodiversity in Nanyue,investigations were carried out on Castanopsic eyeri forest,an original forest community.The results show that natural forest vegetation in Nanyue can be divided into 7 vegetation types and 21 formations.Castanopsis eyeri forest,one of the original forest communities in Nanyue and a community type noe reported,can be named. Association of Castanopsis eyeri-phyllostuchys nidnlaria+ Neolitsea aurata var. paraciculata-Lophatherum gracile + Cyperus rotundus.The floristic elements of genera in the community are mainly compossed of Pan-tropic and North Temperate,but those of species are mainly composed of Cathaysian,East Asia and East China-Central China.The wood plants constitutes the majority in the community which has 3 layers,ie,arbor,shrub and herb.Castnopsis eyeri forest still keeps the characteristics of evergreen board-leaved forest in the years of evolution,but its dominant species Castanopsis eyeri has been replaced by Neolistea nurata var. paraciculata and Listea elongata.The method of using comprehensive value (CVi) to confirm the action and importance of the regenerational species of commnity is put forward.