Analysis of the distribution pattern of wild vascular plant diversity in Gansu Province, China

doi:10.11686/cyxb20140104

Abstract

Abstract: Based on data from previous literature,plant specimens and field investigations,the database of wild vascular plants in Gansu Province has been established. The name of each county was the primary key,the data of plant species and the vector of every county of Gansu were combined,and the richness,range size of species,flora differentiations,and similarity index of plant species between two inter-counties are shown on an ArcGIS Desktop 9.3 geographic information platform. The total wild vascular plants species,genera and families in Gansu Province were 5207,1216 and 219,respectively. The differences in plant species richness between different counties were big,and the ranking was Longnan area,Tianshui and Gannan area>Hexi area>Longdong area>Central region in Gansu. Wenxian and Wudu counties were hot-spots of vascular plant distribution in Gansu. Flora differentiations of genera and families were positively significantly correlated with species diversity (R=0.702 and 0.781,respectively),the distribution pattern of plant range size and its richness were inversely related. Based on species similarity indices of each two inter-counties,the plant distribution in Gansu Province was regionalized into nine areas: Longdong loess plateau,Longzhong loess plateau,Gannan plateau,Gannan-Longnan ecotone,Longnan mountainous area,Tianshui Qinling,North Qinling Mountain,Hexi area and Baiyin desert area. The U-type line fault zone (north latitude 35 degree) located in central Gansu from east to west is a dividing line of wild vascular plant distribution; south of this line are 4488 species,accounting for 86% of the total species of Gansu Province.The region of sudden change of wild vascular plants in Gansu Province is in Kongtong country and Yuzhong country.

CLC Number:

Q948.15⁺8

ZHANG Zhi-da,YU Ying-wen,HUA Li-min,PU Xun,WANG Hu-cheng,LIANG Tian-gang. Analysis of the distribution pattern of wild vascular plant diversity in Gansu Province, China[J]. Acta Prataculturae Sinica, 2014, 23(1): 22-30.

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