新疆灌木植物地理成分分析

新疆灌木植物共416种(包括20个变种),隶属于109属,35科.对新疆灌木区系科、属的组成和地理成分进行分析,结果表明:新疆灌木植物地理成分多样,区系性质以温带为主.在科级水平上,除去世界分布科,温带分布科占80%.在属级水平上,北温带分布、旧世界温带分布和温带亚洲分布共有54属,占新疆灌木植物非世界属的56.25%;植物区系的种类趋向于集中在有限的少数科内,单种属和寡种属居多,区系的优势现象比较明显;在属的水平上,北温带成分和地中海成分占优势,分别占总属数的37.5%和23.96%,无中国特有成分,表明新疆灌木植物区系与本地区所处的北温带和古地中海地理位置是一致的.

Geographical Elements Analysis of Shrub Plants in Xinjiang

There are 416 species (including 20 varieties) of shrub plants belonging to 35 families and 109 genera in Xinjiang,China.Based on the analysis of compositions and geographical elements of the flora,the results showed that the flora had a diverse geographical characteristic,with an overwhelming number in temperate region,in which there were 16 families,accounting for 80% the total families in Xinjiang,with taking off the cosmopolitan families.Temperate elements,which includes North Temperate,Old World Temperate and Temperate Asia,accounts for 56.25% without cosmopolitan genera at the genus level.Due to a few families contains a large part of species and genera and the shrub flora of Xinjiang was dominated by single-species and few-species,the flora has marked superior phenomenon.At the genus level,North Temperate elements accounts for 37.5% and Tethys elements accounts for 23.96%,and there is no Chinese endemic genus.This was consistent with temperate zone and Tethys Sea geographical location of Xinjiang.