青藏铁路沿线原生植被多样性分布格局研究  

Distribution Patterns of Species Diversity of Natural Vegetation Along Qinghai-Tibetan Railway

作　　者：周金星[1] 易作明[1] 李冬雪[1] 高甲荣[2] 

机构地区：[1]中国林业科学研究院林业研究所国家林业局林木培育实验室,北京100091 [2]北京林业大学水土保持学院教育部水土保持与荒漠化防治重点实验室,北京100083

出　　处：《水土保持学报》2007年第3期173-177,187,共6页Journal of Soil and Water Conservation

基　　金：铁道部科技研究开发重大计划(2004G009);公益性行业(林业)科研专项(2007)

摘　　要：原生植被优势种及生物多样性的空间分布特征对于青藏铁路沿线植被恢复和重建具有重要的理论指导意义。在对青藏铁路沿线1142 km设置27个样带、248个样地、2242个样方进行系统调查的基础上,系统研究了青藏铁路沿线植物群落优势种组成及生物多样性空间分布规律。在铁路沿线样方中共出现种子植物305个种与变种,22个灌木种,283个草本种和亚种,分别隶属于40科、134属;优势种种类相对较少,共40种,灌木4种;物种丰富度(S)沿铁路呈南多北少趋势,在高平原地段丰富度相对较高,且随海拔的升降而升降;α多样性指数也呈南多北少趋势,其值的变化主要受到水热条件的影响,而与海拔变化并没有必然的联系;以相邻样带之间的β多样性指数值为依据,将铁路沿线分为6个不同生境区段。Since the dominant species of original vegetation and the distribution patterns of the bio-diversities are essential to vegetation recovery and restoration along the Qinghai-Tibetan railway, based on 27 vegetation transects and 248 plots and 2 242 samples, this paper systematically analyzed the patterns of dominant species and biodiversity. There were 305 species along the railway and among these 22 were shrub, 283 were herbage. They be- longed to 40 families and 134 genuses. Yet there were only 40 dominant species, and only 4 were shrub. There were more species in southward than in northward and the species richness（S） changed closely with the altitude. The α-diversity varieties relyed on the condition of water and heat. 6 different habitats were made based on the side by side β -diversities.

关 键 词：青藏高原 青藏铁路 原生植被 优势种 生物多样性 分布格局 

分 类 号：Q143[生物学—生态学] Q948[生物学—普通生物学]