科尔沁沙地丘间地植被演变的研究

INTERDUNE SUCCESSION IN THE KERQIN SANDY REGION

主要研究了科尔沁沙地丘间地植被的发生和演变规律及不同发育时间群落种类组成动态特征。结果表明 :丘间地植被发育很快 ,在围封条件下 ,30年内经历了一年生草本阶段、多年生草本阶段和灌丛阶段。在组成结构上 ,物种多样性指数和均匀度呈上升趋势 ,而生态优势度下降 ,表明其相对稳定的特征。

From a study on the occurrence and successional characteristics of vegetation on bare land in interdunal areas in the Kerqin sandy region we note that: 1) The succession rate of interdune vegetation is very fast. 2) The annual herb, perennial herb and shrub stages are completed in 30 years. 3) Shannon Wiener diversity and evenness increased with time through succession, though the community dominance index decreased. The influence of pasturing on the vegetation was also analyzed and is discussed.