缙云山常绿阔叶林固定样方的植物群落特征

THE PROPERTIES OF PLANT COMMUNITY OF THE FIXED PLOT OF THE EVERGREEN BROAD-LEAVED FOREST IN SANCTUARY OF JINYUN MOUNTAIN

研究了四川重庆缙云山自然保护区常绿阔叶林定位站固定样方的环境条件,植物种类组成,群落结构特征和种群分布格局.固定样方在1ha绝对保护的样地内.面积500m^2.海拔820m,砂岩,黄壤,典型中亚热带气候.500m^2样方内有维管植物57种46属24科.木本37种,草本14种,藤本6种.植物属的分布区类型主要是热带性质,占总分布型的61.36%;种的分布型主要集中在热带亚洲和中国特有类型,均占38.60%.群落层次清楚,银叶木荷为建群种,小叶栲和白毛新木姜子为第二亚层优势种.

In this paper, the authors briefly introduce the environment condition, the composition of plant categories, the structural characteristics of plant community and the population distribution pattern in the fixed quadrat of evergreen broad-leaved forest in Jinyun Mountain. The fixed quadrat is 500 m2 within the sample plot with the area of 1 ha proteced absolutedly. It is 820 m above the sea level with sands tone and yellow earth, and with typical climate of intermediate subtropical monsoon. In the quadrat of 500 m2 there are 57 species, 40 genera and 24 families of vascula plaantsj 37 species of woody plant; 14 species of herb and 6 species of vine. It is shown that 27 genera (61. 36 %) are of tropical distributions 10 genera (22. 73 %) of temperate distribution. For the species. 22 species (38. 6 %) are of tropic-Asia distribution and China endemic distribution, 11 species (19. 3 %) are of East-Asia distribution. The plant community are divided obviously into three layers of tree, shrub and herb. The constructive Specis is Sdtima argealea, and the dominate species of the second layer are Casianopsis carlesu, var. sfaailosa and Neotitsea auraia vat. ylouou.