The results indicate that the rate of species accumulation is related to the logarithm of number of individuals in each vegetation type, independent of diameter classes.
结果表明：各种植被类型中物种数与个体数对数成线性关系是一种普遍现象，且不受调查树木的径木级影响。
In this paper, the algebraic connectivity of trees is determined by grafting; meanwhile the relation between the algebraic connectivity and the diameter of two classes of trees is also determined.
利用移接变形给出树的代数连通度的一种变化关系，同时给出了两类树的代数连通度与直径的关系。
This experiment was conducted to understand the species composition, diameter distribution, types and decay classes of coarse woody debris(CWD) on the 9.
为对象，分析了粗木质残体（CWD）的物种组成、径级分布、存在形式、腐烂等级。
This experiment was conducted to understand the species composition, diameter distribution, types and decay classes of coarse woody debris(CWD) on the 9.
为对象，分析了粗木质残体（CWD）的物种组成、径级分布、存在形式、腐烂等级。
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