喀喇昆仑山-西昆仑山苔藓植物区系及物种多样性1）

摘要

We determined bryophytes areas in Karakorum-West Korum area, and analyzed the geographical elements by cluster analysis.After detailed examination, we determined 32 families, 76 genera and 178 species ( including 5 varieties) of bry-ophytes.Among them, 7 families, 8 genera and 11 species are liverworts, and 25 families, 68 genera and 167 species are mosses.The moss floristic element of Karakorum-West Korum area was divided into 10.Among them, the flora was domi-nated by North Temperate Zone types corresponding to 71.81%of the total, followed by East-Asian elements accounting for 8.85%, and the tropical element was little.By cluster analysis of ten regions, KarakorumW-estkorum area had the closest relatives of flora with Eastern Tianshan Mountain, and bryophytes flora of Karakorum-Westkorum area was closely associat-ed with Helan Mountain.Ten samples in Karakorum-Westkorum of bryophyte species diversity index analysis showed that in Shihshu and Gosas the distribution of bryophytes are most abundant.%对喀喇昆仑山—西昆仑山苔藓植物区系成分进行了划分，并对该区系与邻近9个地区的地理成分进行了聚类分析。经查阅有关资料和标本鉴定，确定新疆喀喇昆仑山共有苔藓植物32科、76属、178种（含5变种），其中苔类为7科、8属、11种，藓类25科6、8属、167种。喀喇昆仑山—西昆仑山苔藓植物区系成分可划分为10种类型，其中北温带成分居主导地位，占该地区苔藓植物总种数的71．81％，东亚成分次之，占8．85％，热带成分甚微。地理成分区系谱及聚类分析结果表明，新疆喀喇昆仑山—西昆仑山与东部天山苔藓植物区系关系最为接近，与贺兰山密切相关。对喀喇昆仑山—西昆仑山10个样点中苔藓植物多样性指数的分析结果表明，西合休和果萨斯苔藓植物分布较丰富。