结果表明北京市主要湿地的物种组成和群落结构存在很大的差异，湿地内主要物种的重要值有季节性的变化。
The result shown that there is a significant difference in the species composition and community structure in different wetlands. The important value of wetland plants reveals a seasonal variation.
植被基带群落中，在物种数量、区系成分和重要值方面，常绿和落叶阔叶树种所占的比例都相差无几。
Evergreen and deciduous broad-leaved tree species were almost equivalent in quantity and importance values in the basal vegetation zone.
采用典型抽样方法，对长白山北坡不同海拔高度带云冷杉林的植物种类组成及重要值进行了初步研究。
Using typical sampling method, the paper studies the composition and important value of plant species in subalpine spruce fir forest on Northern Slope of Changbai Mts.
重要值在林分郁闭前逐渐增加而后减少的植物种组成了侵入种组，包括75种喜光植物；
The invasive species group included 75 light-loving species, which increased their density before stand closed and afterwards decreased.
重要值在林分郁闭前逐渐增加而后减少的植物种组成了侵入种组，包括75种喜光植物；
The invasive species group included 75 light-loving species, which increased their density before stand closed and afterwards decreased.
应用推荐