信阳师范学院学报（自然科学版）2016，Vol.29Issue(3)：405-411,7.DOI:10.3969/j.issn.1003-0972.2016.03.023
西藏地区种子植物多样性分布格局和多样性分化特点
The Spatial Patterns of Species Diversity of Seed Plants and Its Differentiation in Tibet
摘要
Abstract
The geographical patterns and differentiation of species diversity of seed plants in Tibet were in-vestigated based on large-scale plant distribution information through combination with geographic information system and statistical analysis.The results showed that the discreteness of datasets of plant diversity and flora differentiation decreased from species to families.Compared with that of families,the spatial variability of spe-cies and genus was more apparent,which may be because that species,genus and families represent different periods of geological history.Compared with central and northern regions,the southern Tibet with more com-plex topography,especially the east southern Tibet,had more diverse plants whether on the species or genus level.There was a significant positive correlation between the flora differentiation of seed plants and altitudinal variation,indicating that complex topography might be beneficial for flora differentiation.The flora differentia-tion had obvious influence on the geographical distribution of plants in the researched area.This may be related to the climate change caused by differential uplift of stratums in the geological history of Tibet.关键词
西藏地区/种子植物多样性/地理分布格局/区系分化Key words
Tibet region/seed plant diversity/geographical pattern/floristic differentiation分类
农业科技引用本文复制引用
杨光澍,冯建孟..西藏地区种子植物多样性分布格局和多样性分化特点[J].信阳师范学院学报（自然科学版）,2016,29(3):405-411,7.基金项目
国家自然科学基金项目(31360143,31560178) （31360143,31560178）
