珍稀濒危植物中甸刺玫种群结构与空间分布格局研究

为了揭示中甸刺玫Rosa praelucens的种群特征，在香格里拉中甸刺玫分布区域设置10个样方，编制中甸刺玫的静态生命表、存活曲线、χ2值、连接系数(AC)、种间共同出现百分率(PC)等指标对中甸刺玫种群结构进行分析；采用Cassie指标(CA)、丛生指标( I )、负二项式分布参数 (K)、聚块性指数(PAI)等聚集强度指数分析种群分布格局。结果表明：(1)中甸刺玫种群属于衰退型，年幼树种较少，老年的个体所占比例较大，种群更新慢；(2)按照Deevey的分类，中甸刺玫的存活曲线属于III型；(3)进行χ2检验，发现中甸刺玫群落中各物种间的独立性比较大；(4)中甸刺玫种群分布格局基本遵循聚集分布的格局。

Population Structure and Spatial Distribution Pattern of Endangered Species Rosa praelucens

In order to reveal population characteristics of Rosa praelucens, 10 sample plots were set in its distribution area in Shangri-La, and life table, survival curve, χ2, AC, PC of R. praelucens were compiled to analyze the population structure of R. praelucens. CA, I, K, PAI and other aggregation intensity indexes were used to analyze the population distribution pattern so as to provide theoretical basis for population protection of R. praelucens in Shangri-La. Results showed that: (1)R. praelucens belonged to the recession, with few young trees, large proportion of elderly individuals, and slow population renewal. (2)According to Deevey classification, the survival curve of R. praelucens belonged to Deevey III. (3) Through χ2 test, it was found that the independence of individual species in R. praelucens community was relatively large. (4) The distribution pattern of R. praelucens population basically followed the pattern of aggregation distribution.