1) different layers
多种层
3) structure and horizon fine interpretation in various methods
多种方法层位、构造解释
4) species diversity in shrub layer
灌木层物种多样性
1.
Using canonical correlation analysis, this paper aims to find major stand variables affecting species diversity in shrub layer in 3 types of over logged forests in northeastern China, which include soil water content, tree species diversity and tree stems per hectare.
本文作者以我国东北过伐林区 3种典型天然林类型为对象 ,采用典型相关分析方法 ,研究影响灌木层物种多样性的主要因子 。
5) understory species diversity
林下层物种多样性
补充资料：层层加码
1.谓逐级增加任务和逐级提出各种要求等。
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