北京林业大学学报2011，Vol.33Issue(3)：45-50,6.
西藏色季拉山林线植被群落数量特征
Quantitative characteristics of timberline vegetation on Mt. Shergyla, Tibet.
摘要
Abstract
In order to make clear the spatial distribution of timberline vegetation and its ecological adaptability,we quantified the characteristics of the vegetation in the timberline ecotone on Mt. Shergyla in Tibet using multivariate analysis (TWINSPAN classification and DCA ordination ) of the importance values of the plant species (herb, shrub and tree layer) in each of the 26 study plots. Results from TWINSPAN showed that along the timberline ecotone in an altitudinal range of 1 000 m, seven vegetation types (associations) were distinguished and the transitional belts between adjacent vegetation types were narrow. Results from DCA were similar to those from TWINSPAN, i. e. , each vegetation type had its own ranges and demarcation lines. The first DCA ordination axis stood for altitude, and vegetation types changed with the changing altitude; the second DCA ordination axis represented soil water condition, and it increased with the increasing altitude; the ordination series in the diagonal line indicated the environmental heterogeneity of the habitats on Mt. Shergyla in Tibet.关键词
林线植被/西藏/TWINSPAN分类/DCA排序Key words
timberline vegetation/ Tibet/ TWINSPAN classification/ DCA ordination分类
农业科技引用本文复制引用
杨小林,王景升,陈宝雄,普穷..西藏色季拉山林线植被群落数量特征[J].北京林业大学学报,2011,33(3):45-50,6.基金项目
国家自然科学基金项目(30571484)、教育部重点科技项目(208136)、林业公益性行业科研专项(200804001). （30571484）
