Title: Plant biodiversity and flora composition in southeast Tibet
Abstract: The studies on floristic composition and species diversity are of great significance to understand the origin,evolution and underlying mechanism of flora and plant diversity.Southeast Tibet is characterized by special geologic history and high richness of plant diversity,and the study on floristic composition and plant diversity in this region is of great importance.In this paper,we examined the plant diversity and floristic composition in southeastern Tibet,based on large scale information of phytogroup and floristic composition.Our results showed that southeastern Tibet holds a total of 3114 species of seed plants,subordinated in 153 families,876 genus.Further investigations showed that the studied area constituted 88%,78%,54% of the total number of families,genus and species in the Tibet respectively,with only 10% of the total land area.Therefore,we suggested that the studied area may be the one of the hotspots of plant diversity in the Tibet region.At the family level,Pantropical elements gained domination(51%),followed by the North Temperate elements(22.6%).In the genus level,the largest proportion is the North Temperate elements(21%) and Pantropic elements(15.5%).We also observed that at the family level,tropical elements accounted for about 70%,while at genus level,tropical elements accounted for only about 44%.This vast contrast of floristic composition,especially the big difference of temperate and tropical elements may be due to the different geological implications of families and genus,and the Qinghai-Tibet plateau uplift.We also found that compared with Xishuangbanna areas and Nangun River Nature Reserve,flora in Drung river regions showed much stronger associations with those in the studied area.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 5
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