凤阳山自然保护区麂角杜鹃种群结构与分布  

The population structure and distribution of Rhododendron latoucheae in Fengyangshan Nature Reserve

作　　者：高俊香[1] 梅盛龙 鲁小珍[1] 李美琴 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037 [2]浙江凤阳山-百山祖国家级自然保护区凤阳山管理处,323700

出　　处：《南京林业大学学报（自然科学版）》2009年第2期35-38,共4页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家林业局长江三角洲城市森林生态系统定位研究(2001-5)

摘　　要：采用样方法,在凤阳山自然保护区海拔约1400 m的核心区共设置25个样地,对麂角杜鹃的种群结构和分布格局进行了研究。结果表明:麂角杜鹃种群在各个年龄级的分布极不均匀,其中以4级幼树所占比例最大,其次是3级幼苗,因此,种群的年龄结构为增长型。麂角杜鹃种群在整个群落中的分布格局为集群分布,这主要与物种亲代种子的散布习性有关。其分布格局动态,从幼苗到大树均为集群分布,从幼苗到幼树,种群的聚集程度降低,种群有扩散的趋势;而从中树到大树,种群的聚集程度增大,种群表现为聚集。总体来看,该种群由幼苗到大树呈现扩散的趋势。这种分布格局变化与麂角杜鹃生物学和生态学特性密切相关。Using the plotting method, 25 plots were established in the core area which is about 1 400 meters above sea level in Fengyangshan Nature Reserve. The population structure and distribution pattern of Rhododendron latoucheae were studied. The results showed that the distribution of the R. latoucheae population in every age class was very uneven, the proportion of the forth-class young tree was the largest, the third-class seedlings took second place. So the age structure of the population was growing. The distribution pattern of R. latoucheae population in the whole community was clumped. It was mainly related to the parental habits for seed distributing. The dynamic distribution pattern from seed- lings to big trees were all clumped. The intensity of the population was reduced and the population had the trend of diffusion from seedlings to young trees. But from medium-sized trees to big trees, the intensity of the population increased and the population clumped. Overall, from seedlings to big trees, the population showed the trend of diffusion. It was related to their biological and ecological characteristics.

关 键 词：凤阳山自然保护区 麂角杜鹃 种群结构 分布格局 

分 类 号：S718[农业科学—林学]