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

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。

The communities where Paeonia suffrutl'cosa var. spontanea grows were classified into 10 types of vegetation, reprensenting 10 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 Paeont'a suffrUticosa var.spontanea lthe 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 PaeonI7a suffruticosa var. spontanea population areclump.