中文摘要：

通过对祁连山不同景观类型中的苔藓植物进行样方调查与物种组成统计,采用物种相似性系数、多样性指数对苔藓植物物种多样性进行了分析。结果表明,30个10 m×10 m的样地内共计苔藓植物19科34属48种,其中优势科（≥3种）有6科,含19属31种,分别占本地区苔藓植物总属数和总种数的55.88%和64.58%。在5种景观类型中,针叶林带和高山灌丛带分布的苔藓植物物种相似性最高（相似性系数为0.5357）;河岸带和高山草甸带分布的苔藓植物物种相似性最低（为0）,表现出祁连山地区苔藓植物分布的丰富性和复杂性;高山灌丛带分布的苔藓植物物种多样性指数最高,但针叶林带苔藓植物最为丰富,是祁连山苔藓物种多样性保护的关键区域。

英文摘要：

In this paper, a sampling survey was conducted on the bryophytes in different landscapes of Qilian Mountain,with species composition,similarity,and species diversity index investigated. Nineteen families,34 genera,and 48 species of bryophytes were found. There were six dominant families,including 19 genera and 31 species,accounting for 55. 88% of total genera and 65. 58% of total species,respectively. The species similarity between coniferous forest and the alpine scrub belt was the highest（ 0.5357）,while that between riparian forest and the alpine meadow belt was the lowest（ 0）. Results showed that the bryoflora of Qilian Mountain was rich and complex. Although the species diversity index of the alpine scrub belt was the highest,the bryophyte community in the coniferous forest belt had the richest species diversity,indicating it was a key area for bryophyte species diversity conservation in Qilian Mountain.