福建中亚热带常绿阔叶林种类组成的空间分布

STUDY ON THE SPATIAL DISTRIBUTION OF FLORISTIC COMPOSITION IN THE MIDDLE SUBTROPICAL EVERGREEN BROAD-LEAVED FOREST IN FUJIAN PROVINCE

首次对福建中亚热带常绿阔叶林物种种类组成进行区域分布和垂直分布的研究 ,结果表明 :① 6个区域和 6个海拔梯度群落的植物类型中 ,物种数基本上是双子叶植物 >单子叶植物 >蕨类植物 >裸子植物 ;②各区域群落植物存在不同比例的共有种、偏宜种和特征种 ,群落各层次结构的物种及其数量差异很大 ,群落与群落之间的物种相似性存在一定规律性 ;③各海拔梯度由于生态因子的差异 ,物种在海拔梯度和层次结构上的分布产生明显差异 。

This paper first dealt with horizontal and vertical distribution of the fioristic composition in the middle subtropical evergreen broad-leaved forest, Fujian province. The results show that:①the species number of dicotyledon is the first, monocotyledon the second, pteridophyte the third, gymnosperm the least in the commtunities of six areas and six elevation grades;②in the communities of six areas there are different proportions of constant, selective and exclusive plants, and that the species and its number of the community hierarchical strtcctures are different from each other, and that there are some regulations of species similarity between two of the 6 communities; ③because of the differences of the ecological factors, there are notable differences for species in the cormnunities and their hierarchical structures in the six elevati on grades, and that the species similarity between two of the 6 communities descends as elevation grades ascends.