摘要
南岳的包石栎锐齿槲栎林是一种尚未报道的类型 ,即包石栎 +锐齿槲栎 +甜槠 -箬竹 -求米草群丛。群落内有植物 63科、1 0 2属、1 2 9种 ,属的区系成分可划分为 1 3种分布区类型 ,以温带性质成分为主 ;种可划分为 1 7个种分布式样 ,以华夏、东亚、中国—日本、华东—华中、中国—喜马拉雅和华中—华南—西南 6种类型为主。木本和草本植物各占 65 .1 2 %和 3 4.88% ,常绿和落叶成分各占 1 9.3 8%和占 45 .74%。群落可划分为乔木、灌木、草本 3层 ,在更新演替过程中仍将保持常绿落叶阔叶混交林性质 ,但优势种、亚优势种可能会被其他种取代。群落物种多样性Simpson指数值与东南亚、南美和西非比较接近 ,而Shannon Weaver和α 指数值与山地季雨林水平接近。几何级数分布、分割线段模型适于拟合乔木层 ,分割线段中的多度—频度和对数正态模型适于拟合草本层 ,对数级数分布模型适于拟合任何层次。
The paper studies the forest community which is not reported and is named the association of Lithocarpus cleistocarpus+Quercus aliena var.acuteserrata+Castanopsis eyeri-Indocalamu stessellatus-Oplismenus undulatifolius in Nanyue of Hunan Province. There are 129 species,102 genera and 63 families of vascular plant in the community. According to the distribution of genera of vascular plant in the community,we can divide them into 13 areal-types,of which North Temperate,Pantropics and East Asia are major elements and occupy 22.73%,21.59% and 17.05% of total respectively,those temperature feature is a dominant position but the next tropical one. The species can be divided into 17 distrobutional patterns,of which Cathaysian,East Asia,Sino-Japan,East China-Central China,Sino-Himalayan and Central China-South China-Southwest China are the most and occupy 23.62%,15.75%,14.96%,10.24%,8.66% and 8.66% of total respectively,East China-Central China and Central China-South China-Southwest China mainly affect the floristic formation of the community. The plants of wood and herb in the community occupy 65.12% and 34.88% of total respectively,the evergreen and deciduous elements in the wood plant occupy 19.38% and 45.74% of total respectively. The community can be divided into 3 layers of arbor,shrub and herb. It still keep the character of the evergreen deciduous broad-leved mixed forest,but its dominant and subdominant species in the community will probably replaced by Neolitsea aurata var.paraciclata,Camellia caudata,Lindera reflexa,Cyclobalanopsis multinervis,Carpinus viminea and Lithocarpus henryi. It studies the plant species diversity of the community by using the formulae of richness,dominance,variety,evenness and regarding the important value,individuals or fresh weight and dominance or coverage as the measurement degree. The results show that the values of the species diversity used different measurement degree in the same layer of community are different and those of the different formulae used same measurement degree are different too,and that the level of the species diversity of the community approaches the level of southeastern Asia,southern America and western Africa by using the index of Simpson but those between the seasonal rain forest and Savanna by using the index of Shannon-Weaver. It studies the relationships between numbers of plant species and its and its individuals of the community by using the Geometric series distributional model,Broken-stick model,Log series distributional model and Lognormal distributional model. The results show that the models of Geometric series Distribution and Broken-stick are suitable for imitating the arbor layer of the distribution pattern of the plant species relative abundance of the community,the models of Abundance-frequency in Broken-stick and Lognormal distribution suited for imitating the herb layer,and Log series distributional model suited for imiataing any layer.
出处
《广西植物》
CAS
CSCD
北大核心
2004年第3期224-231,共8页
Guihaia
基金
湖南省科技厅资助项目 (0 1 95 3 12 4 )
关键词
湖南
物种多样性
优势种
森林群落
包石栎锐齿槲栎林
Lithocarpus cleistocarpus+Quercus aliena var.acuteserrata forest
floristic characteristics
plant species diversity
distribution pattern of plant species relative abundance
Nanyue(Hunan)
