四川牡丹生境群落的数量分类与排序

根据四川牡丹野外样方调查数据,采用双向指示种分析(TWINSPAN)方法对四川牡丹生境群落进行数量分类,并采用典范对应分析(CCA)方法对四川牡丹分布区群落与环境因子的关系进行定量研究。结果表明:数量分类将四川牡丹生境群落24个样方划分为10个群丛;CCA样方和物种排序结果显示,四川牡丹生境群落分布格局是由坡度、海拔、土壤自然含水率等环境因子综合决定的。而四川牡丹生境群落类型在很大程度上由群落优势种的分布格局决定,揭示了四川牡丹群丛类型和物种分布格局随环境梯度变化的趋势。

Quantitative Classification and Ordination of Paeonia decomposita Habitat Communities

With the data from Paeonia decomposita filed survey, we studied quantitative classification of P.decomposita habitat communities by TWINSPAN , and analyzed the relationship between P.decomposita habitat communities and environmental factors by CCA .The 24 plots of P.decomposita habitat communities were classified into 10 types of plant association by quantitative classification .The result of CCA plots and species ordination showed the relationship between the distribution pattern of P.decomposita habitat communities and slope , altitude, and soil moisture.The types of P.decomposita habitat communities were determined by the distribution pattern of dominant species , showing the variation trend of P.decomposita habitat community types and species distribution with environmental gradient .