滇西北光叶珙桐群落特征及种群更新研究

摘要

对滇西北光叶珙桐所处群落的群落结构、物种组成、区系特征、生活型谱及光叶珙桐的种群更新状况进行了研究。结果表明，(1)该地区光叶珙桐群落结构层次分明，乔木层盖度达40%~70%，优势种明显；(2)群落植物资源相对稀少，共有野生维管束植物60科100属114种；(3)群落种子植物区系构成中，以温带分布属为主，占总属数的52.17%；(4)光叶珙桐种群更新较差，主要由自身原因、生境原因、动物啃食及人为干扰共同作用所致。%The study mainly analyzed the structure characteristics,species composition,flora characteris-tics,life-form spectrum and species regeneration of Davidia involucrata var.vilmoriniana .The results showed that: (1)Layers of D.involucrata var.vilmoriniana community structure were distinct,cover-age rate of arborous layer was 40 %~70 %,The dominant species was significant. (2)The species re-sources of the community were relatively rare.There totally were 1 14 species of native vascular plants, belonged to 100 genera and 60 families. (3)The flora composition of angiosperm was mainly temperate distribution type that occupied 52.17 %.(4)The regeneration of D.involucrata var.vilmoriniana com-munity in this area was poor,mainly because of its own combination,habitat envrionment,gnawing by animals and disturbance from human being.