【摘要】 针对贺兰山蒙古扁桃种群分布特点,选择3个典型生境下的种群作为研究对象,以现地实测数据为基础,采用统计学方法对其种群结构和空间分布特征进行了研究,以期为该区域的生物多样性保护和资源合理开发利用提供依据。结果表明:生境异质性会对植物个体生长和种群特征产生直接的影响,处于干旱阳坡种群的密度较大,但是灌丛高和冠幅平均直径较小;位于干河床种群的密度最小,但灌丛高和冠幅平均直径较大。所调查样地内均有蒙古扁桃的实生苗存在,种群更新良好并处于稳定状态。贺兰山蒙古扁桃种群在生境适宜的小尺度范围内呈集群分布,且以幼苗和幼树为主,随着空间尺度的放大,种群呈明显的随机分布特征。更多还原

【Abstract】 Based on an investigation into the Prunus mongolica communities distributed in the Helan Mountains of China. There is great significance to master the Prunus mongolica population structures and distribution patterns for the biodiversity conservation and the resource protection and reasonable development in the nature reserve. Three representative samples were set up in different habitats and the population structures and distribution patterns were discussed by using statistical methods. The results showed that the growth of individual plant and population density and spatial structures were distinctly different under the different habitat conditions. There were mang seedling within the scope of invenstigation which indicating the Prunus mongolica population had a better renewal and in a stable state. In addition,we also found that under suitable growth environment and population were dominated by young trees,the population displayed an aggregated distribution pattern. And a random distribution pattern was observed with spatial criterion increasing.更多还原