Quantitative analysis of different restoration stages during natural succession processes of subalpine dark brown coniferous forests in western Sichuan, China
Ma, J-Ming.; Liu, S-Rong.; Shi, Z-Min.; Zhang, Y-Dong.; Chen, B-Yu.
Ying Yong Sheng Tai Xue Bao 18(8): 1695-1701
2007
ISSN/ISBN: 1001-9332 PMID: 17974231 Document Number: 606833
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 mossdark brown coniferous old-growth forests after clear-cut were quantified at different temporal series (20, 30, 40, 50 and 160-200 years). The results showed that Betula albo-sinensis, Salix rehderiana, Acer mono, A. laxiflorum, Prunus tatsienensis, Hydrangea xanthoneura, Tilia chineusts and Salix dolia were the declining species groups with progressive restoration processes from secondary forest.to mature moss and bamboo-dark brown coniferous forests, Sorbus hupehensis, S. koehneana and P. pilosiuscula were the transient species groups, and Abies faxoniana, Picea purpurea, Tsuga chinensis and P. wilsonii were the progressive species groups. During the period of 20-40 years restoration, the secondary forests were dominated by broad-leaved tree species, such as B. albo-sinensis, and the main forest types were moss - B. albo-siaeusis forest and bamboo - B. albo-sinensis forest. Through 50 years natural succession, the secondary forests turned into conifer/broad-leaved mixed forest dominated by B. albo-sinensis and A. faxoniana, and the main forest types were moss - B. albo-sinensis - A. faxoniana forest and bamboo - B. albo-sinensis - A. faxontana forest. The remained 160-200 years old coniferous forests without cutting were dominated by old-growth stageA. faxoniana, and the main forest types were moss -A. faxoniana forest and bamboo -A. faxoniana forest.