广东南澳岛马尾松林的群落结构

THE STRUCTURE OF PINUS MASSONIANA COMMUNITY ON NAN'AO ISLAND, GUANGDONG

摘要:

1996年调查了广东南澳岛马尾松群落的种类组成、群落的水平结构和垂直结构、群落的组织水平结构。南澳岛马尾松群落的组成种类数量为28－32种，群落高度为7－10m，可分为乔木层、灌木层和草水层3个层次，乔木层的平均个体密度为17－32株m^-2，群落的Shannon－Weiner多样性指数为1．715－3．269，均匀度0．439－0．818，生态优势度为0．223－0．102。马尾松群落是海岛植被破坏后形成的先锋群落，但山于海岛环境的特殊性，不宜大面积发展马尾松林，可通过间种台湾相思等阔叶树种进行林分改造。

Abstract:

The community structure including species composition, horizontal structure and vertical structure, and the organization structure of Pinus massoniana community on Nan' ao Island were investigated in 1996. The results showed that the community was composed of 28-32 species in 3 plots, and could be divided into 2 tree layers, a brushwood layer and a herb layer. The average individual density of tree layer in 3 plots of the community was 1.7- 3.2 individuals m^-2, and the Shannon-Weiner index of diversity was 1 .715 - 3.269. The ecological dominance of the community was 0.223 - 0.102, and the evenness index being 0.439 - 0.818. Pinus massoniana community is a pioneer community on disturbed island which can be developed into coniferous-broadleaf mixed forest.