Two new gallotannins, pistafolins A (1) and B (2), were isolated from the leaf extract of Pistacia weinmannifolia. Their structures were determined by spectral methods.
为探明清香木群落中物种种间关系及生态种组构成,在对其进行群落生态学样方调查的基础上,使用方差比率(VR)法进行多物种间关联性测定与检验,运用积矩相关(Pearson)与秩相关(Spearman)对物种多度数据进行相关性分析。结果显示,(1)清香木...为探明清香木群落中物种种间关系及生态种组构成,在对其进行群落生态学样方调查的基础上,使用方差比率(VR)法进行多物种间关联性测定与检验,运用积矩相关(Pearson)与秩相关(Spearman)对物种多度数据进行相关性分析。结果显示,(1)清香木群落处于植被演替早期阶段;(2)清香木与群落内多数物种形成显著正联结,种间协变测定的结果分析与此相符;(3)星座图呈现3个组团,据此将清香木群落中的优势种划分成3个生态种组并命名为共有种组(Mutual species group)、边缘种组(Marginal species group)和特征种组(Characteristic species group)。展开更多
文摘Two new gallotannins, pistafolins A (1) and B (2), were isolated from the leaf extract of Pistacia weinmannifolia. Their structures were determined by spectral methods.
文摘为探明清香木群落中物种种间关系及生态种组构成,在对其进行群落生态学样方调查的基础上,使用方差比率(VR)法进行多物种间关联性测定与检验,运用积矩相关(Pearson)与秩相关(Spearman)对物种多度数据进行相关性分析。结果显示,(1)清香木群落处于植被演替早期阶段;(2)清香木与群落内多数物种形成显著正联结,种间协变测定的结果分析与此相符;(3)星座图呈现3个组团,据此将清香木群落中的优势种划分成3个生态种组并命名为共有种组(Mutual species group)、边缘种组(Marginal species group)和特征种组(Characteristic species group)。