濒危植物矮牡丹的分布格局及其生存群落的数量分析

THE DISTRIBUTION PATTERNS OF PAEONIA SUFFRUTICOSA VAR. SPONTANEA AND THE QUANTITY ANALYSIS OF THE COMMUNITIES WHERE IT GROWS

摘要: 对山西稷山马家沟、永济水峪口,陕西延安万花山、华阴二仙桥4个地区矮牡丹生存群落进行了分类和排序研究,TWINSPAN分类将矮牡丹生存群落分为10类,分类结果在DCA二维排序图上得到了有效的验证。说明矮牡丹适应能力较强,但除了在地带性顶级群落辽东栎林下矮牡丹能形成灌本层优势种外,在其它群落中,矮牡丹只属于群落的伴生成分;用Morisita指数法、负二项指数法和方差均值比法3种方法对矮牡丹种群进行了分布格局的判别,结果一致证明矮牡丹种群均呈集群分布格局。

Abstract: The communities where Paeonia suffruticosa var. spontanea grows were classified into 10 types of vegetation, reprensenting₁₀ associations,by TWINSPAN. The result of DCA proved that these ten types were rational. Among these 10 associations,Quercus liaotungensis forest is the most suitable habitat for Paeonia suffruticosa var.spontanea;the distribution patterns of Paeonia suffruticosa var. spontanea were studiedusing Morisita index,negative binomial index, variance/mean ratio. The results illustrated that the distribution patterns of Paeonia suffruticosa var. spontanea population are clump.