| [quantitative analysis of different restoration stages during natural succession processes of subalpine dark brown coniferous forests in western sichuan, china]. | by adopting space as a substitute for time, and based on the approaches of inter-specific association, pca and optimal division, the restoration stages of various secondary forest communities originated from the natural succession processes of bamboo-dark brown coniferous and moss-dark brown coniferous old-growth forests after clear-cut were quantified at different temporal series (20, 30, 30, 40, 50 and 160-200 years). the results showed that betula albo-sinensis, salix rehderiana, acer mono, a ... | 2007 | 17974231 |