湘西洛塔喀斯特森林木本植物群落学特征研究

STUDIES ON THE TREE SPECIES COMMUNITY CHARACTERISTICS OF LUOTA REGION IN WESTERN HUNAN PROVINCE

对湘西洛塔喀斯特森林木本植物群落的外貌、个体大小、垂直结构、水平分布和群落演替关系等进行了调查研究 结果表明 :喀斯特森林木本植物群落的外貌由青冈栎、石栎、头状四照花、五裂槭等中、小高位芽植物决定 ,其结构一般分为乔木层、灌木层和草本层 ,优势种有青冈栎、石栎、头状四照花和五裂槭 ;组成该群落的木本植物有 36种 ;个体高度呈金字塔增长趋势 ,径级结构也有类似结果 ;在水平分布上 ,优势种为集群分布 。

In this paper ,the appearance ,the individual height ,volume, vertical structure, horizontal dispersion and succession of karst forest community of Luota region in western Hunan province are studied.The results are showed as follows: the appearance of Luota karst forest community is characterized by the middle and low phaneropytes such as Cyclobalanopsis glauca,Lithocarpus glaber ,et al. The structure of the community is generally composed of tree layer, shrub layer and herb layer. The dominants are Cyclobalanopsis glauca, Lithocarpus glaber,Dendrobenthamia capitata ,et al. There are 36 tree, shrub and vine species in this community. The individual height is increased as pyramid, the volume has the same results. On the horizontal pattern, the dispersion of the dominant is dumped, but the dispersion of common species is random.