The analysis of geographical elements demonstrates that the shrubvegetation is secondary and degraded.
地理成分分析表明，该区灌丛具有次生、退化的性质。
2
This paper analysed the characteristics of floristic composition and community structure of shrubvegetation in Lanzhou.
初步分析了兰州市灌木植被的区系组成及结构特征；
3
The random factors were the canopy, slope degree, vegetation type, tree height, shrub height, tree stump height, tree hole density and human disturbance.