【摘要】 应用主成分分析技术,并结合小兴安岭南坡原始林中植物种的生态特性,对该区的植物生态种组进行划分。乔木树种分成6个生态种组,即椴树生态种组;枫桦生态种组;柞树生态种组;落叶松云冷杉生态种组;水曲柳生态种组和毛赤杨生态种组。灌木分成3个生态种组,即榛子生态种组;胡枝子生态种组和柳叶绣线菊生态种组。草本植物被划分成6个生态种组,即酢酱草生态种组;毛缘苔草生态种组;单花鸢尾生态种组;羊胡子苔草生态种组;猴腿蹄盖蕨生态种组和小叶樟生态种组。 这些生态种组之间的关系十分密切。乔木树种的生态种组,灌木生态种组以及草木植物生态种组之间是相互作用和相互依赖的。植物生态种组分类研究,是森林群落分类和森林立地分类的基础。更多还原

【Abstract】 By the technique of principal component analysis (PCA) combined with ecological characteristics of each plant species in the virgin forests on the south slope of Xiaoxingan Mountains,plant ecological species groups (ESG) were divided. Tree species were divided to 6 ecological species groups, i, e., Tilia ESG;Betula costata ESG;Quercus mongolica.ESG;Shrubs were divided to 3 ecological species groups, i. e., Corylus mondshurica ESG;Lespedeza bicola ESG;Spiraea salicifolia ESG;Herbaceous were divided to 6 ecological species groups, i. e., Oxalis ESG;Carex campycorhina ESG;Iris uniflora ESG:Athyrium multidentatum ESG; Deycuxia angustifolia ESG;The relationships among ecological species groups are very closed.Ecological species groups of trees, shrubs and herbaceous are inter-effect and inter-dependent. The classification study of plant species gtoups in the base of forest community classifications and that of forest site classifications.更多还原