查询词典 index forest

The number of species, species diversity and G-F index in the primary forest are the highest. The birds in that community has more species, families and genus, but the number is less.

原生林的鸟类物种数、物种多样性及G-F指数最高，该群落的鸟类在物种和科属水平上拥有最高的多样性，但是个体数量较少。

The results showed that the Shannon-wiener diversity index of forest plant species increased with the increase of the environmental gradient, and the β-diversity indexes of communities showed a liner increase along with the change of environmental gradient.

结果表明：Shannon-Wiener多样性指数随环境梯度的增大而增大，并且β多样性指数与环境梯度呈线性增加的趋势。

The individual number, species number and Shannon-Wiener index of lianas in ravine rain forest and riv...

因此在某些地区，可以将藤本植物物种多样性的高低作为衡量森林演替阶段的一个指标

The paper study relation of tree pattern and BRDF of the foliage canopy through the mechanism of multiple-angle remote scening,the uniform index was used to continuously describe forest pattern and find the relation of them.Based on the relation,the error that is from the old GO model which only suppose foliage colony be random distribution was corrected.

为充分发挥多角度遥感技术在森林资源监测过程中的作用，首先需要认识遥感信号产生的机理，了解植被冠层辐射传输的过程，建立合适的数学模型进行定量描述，最终达到从遥感信号中提取植被信息的目的。

The role of six types of urban plantations in Harbin in maintaining woody plant diversity was assessed quantitatively by sample plot survey and diversity index analysis. The naturalization process and the approaching-nature management modes of the urban plantations were also discussed in terms of richness, evenness and Shannon-Wiener indexes of regeneration layer, succession layer, main storey, brush layer aiming to provide a basis for forest management and biodiversity protection.

采用样地网格调查方法与多样性指数分析方法，定量评价了哈尔滨城市人工林在维持木本植物多样性方面的作用，并通过分析林分更新层、演替层、主林层的多样性指数，探讨了城市人工林自然化过程及其近自然经营途径，以便为哈尔滨城市森林经营与生物多样性保护提供依据。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。