九连山伞花木群落结构特征分析

根据16个样方共1600m2面积调查统计,九连山伞花木(Eurycorymbus cavaleriei)群落共有维管束植物53科82属104种,区系地理成分以热带、泛热带分布的热带性成分为主,占总属数的70.73%。群落最小面积为1600m2。物种多样性Shannon-Wiener指数为5.28,均匀度为88.3%。高位芽植物占总数的86.5%,以中型叶、草质叶、单叶和全缘叶占优势。该群落与中亚热带常绿阔叶林有显著区别,属于从中亚热带向南亚热带常绿阔叶林过渡的类型。群落垂直结构层次明显,可分为乔木层、灌木层和草本层,并有非常丰富的层间植物。从群落物种重要值以及主要种群的年龄结构来看,物种重要值都较低,伞花木的重要值只有24.48,优势种不是很明显,反映本群落正处于激烈的竞争演替中。建议采取人为干扰措施,改善林内光照条件等,提高伞花木林下更新能力和竞争力,稳定伞花木在群落中建群种的地位。

Analysis of Structure Characteristics of Eurycorymbus cavaleriei Community in Jiulian Mountain

According to the survey which has 16 plots of 1 600 m2 area on the Eurycorymbus cavaleriei community in Jiangxi Jiulianshan National Nature Reserve,the results were as follows:there were 104 species vascular plants belong to 82 genera and 53 families.The analysis of the floristic geographical elements indicates that the percentage of tropical and pan-tropical elements is high,accounting for 70.73% of the total genera.The smallest area of communities was 1 600m2.The Shannon-Wiener's index of species diversit...