constructive species

The second stage may last 8 to 13 years, its characteristics is that species emerge or diminish sharply and has obvious constructive species;

第二阶段为演替的中级阶段，需8～13年时间，植物种数增减幅度大，建群种明显；

Results show that there existed no peculiar constructive species in the secondary community, but only hardy grasses and forbs.

结果表明：在沿线两侧形成的次生群落中没有特有的建群种，大多数是耐瘠薄的禾草和杂类草；

Adopting Shannon-Wiener, the niche breadth index, the article classified constructive species on both slopes into 3 ecologic groups respectively.

本文采用Shannon-Wiener生态位宽度指数将南北坡群落的建群种群分别划分为3个生态类群。

The spatial distribution of constructive species of Northeast forest under the climate changing

气候变化条件下东北森林主要建群种的空间分布

Floristic Characteristics of Main Constructive Species of Forest in Henan

河南森林主要建群种区系特性研究

Field Spectral Features and Constructive Species Classification of Vegetation in Modern Yellow River Delta Using Landsat TM

现代黄河三角洲植被主要建群种野外光谱特征及TM分类试验

The special pattern of the constructive species is the important features of the community.

森林群落建群种的空间格局是群落结构的重要特征。