摘要
鹤山龙口村边次生常绿阔叶林属季风常绿阔叶林类型， 其种类组成复杂多样而富于热带性， 据１２００ ｍ２ 的样方统计， 有维管束植物６２ 种， 分属于３２ 科、５４ 属， 其中， 属热带分布的有３２ 种， 属热带－ 亚热带分布的有２１ 种， 属亚热带分布的只有７ 种， 其余２ 种为世界分布。本群落的外貌终年常绿， 层次结构复杂而不明显， 样地内高于１－５ｍ 的立木有５２ 种１８５７ 株， 灌木层种类和株数尚多， １００ ｍ２ 内有１８５株， 草本层以乔灌木幼苗为主， 草本植物较少。群落组成结构与地带性常绿阔叶林相似， 乔、灌、草各层的物种多样性指数在４ 左右， 群落均匀度为０－７ ～０－９ ， 生态优势度为０－０７ ～０－１０ ， 但群落明显具有次生性， 大部分优势种群呈集群分布。若能减少人为干扰破坏， 本群落将向地带性典型植被类型演替。
The secondary monsoon evergreen broad-leaf forest at a village of Longkou Town, Heshan City, Guangdong, located at the south edge of sub-tropical zone, is a community of Helicia cochinchinensis, Endospermum chinense, Machilus chinensis and Gironniera subaequalis. A 1 200 m 2 plot of the community consists of 32 families, 54 genera and 62 species, of which 32 species are tropical elements, 21 pan-tropical and 7 sub-tropical, and the others are extensive species. An evergreen appearance and complicated vertical structure are found in the community. There are 1 857 tree individuals which are over 1 5 m in height in the plot, and 185 shrub individuals in the 100 m 2 plot. Most herb species are offspring of trees and shrubs, the true grasses are few. The organization structure of the community is similar to that of the zonal vegetation. The Shannon-Winner index is about 4, the community evenniss 0 7～0 9 and Simpson ecological dominance 0 07～0 10. Most of the dominant population of the community are of clump distribution. The community would evolve toward the climax vegetation with human disturbance reducing.
出处
《热带地理》
北大核心
1999年第4期312-317,共6页
Tropical Geography
关键词
常绿阔叶林
次生林
群落分析
鹤山龙口村
Evergreen broad-leaf forest
Secondary forest
Community analysis
