白水江国家级自然保护区野生资源植物的垂直分异研究

Vertical Differentiation of Wild Plants in Baishuijiang National Nature Reserve

基于先期建成的种子植物数据库,分析了白水江国家级自然保护区野生资源植物的物种丰富度、资源结构及性状特点沿海拔梯度的分异规律.结果表明:(1)根据资源植物物种数量和种数增减速率,全区可划分为4段:速增较丰富带、稳定丰富带、速减较丰富带和速减贫乏带;(2)根据各100 m海拔段之间植物资源结构的相似性进行聚类分析,结果显示药用植物种数的变化是形成一级分聚的主导因子;(3)随着海拔梯度的上升,资源植物的区系成分、性状特征表现出相对应的垂直分异规律.

Based on the established data banks of seed plants ,the paper explores the differentiation patterns of wild resource plants in species abundance,resource structure and trait with elevation in Baishuijiang National Nature Reserve. The results show that （1） the reserve can be divided into four zones according to its species number and rates of species increase and decrease,and the zones are the zone with abundant spceies that tend to increase their number quickly,the zone with abundant species that tend to maintain stable in number ,the zone with abundant species that tend to decrease their number and the zone with the species that appear poor in abundance and decrease their number quickly; （2） The structures of plant resources at the elevation interval of 100 m are cluster processed to examine their similarities,and this shows that the species change of officinal plants is the dominant factor that leads to the first grade cluster; （3） With increased elevation above sea level, the flora components of the resource plants present corresponding vertical differentiation patterns.