Diversity and Distributional Characteristics of Wild Vascular Plants in Wenshan Prefecture,Southeast Yunnan Province
Grasping the diverse composition and distribution characteristics of wild vascular plants in a specific re-gion is the basic work for regional biodiversity conservation.Wenshan Prefecture is one of the six priority areas for biodiversity conservation in Yunnan Province,and is also an important part of the"three screens and two belts"ecolog-ical security pattern in Yunnan Province,including the tropical forest ecological barrier at the southern border and the karst zone in the southeast.Based on a large number of field surveys and the integration of literature,we analyze the diverse composition and distribution characteristics of wild vascular plants and rare and endangered plants in Wenshan Prefecture,Southeast Yunnan Province.The results show that there are 7900 species of wild vascular plants in Wens-han Prefecture,belonging to 272 families and 1778 genera,including 715 species of ferns(51 families,154 gene-ra),50 species of gymnosperms(8 families,16 genera),and 7134 species of angiosperms(213 families,1608 gen-era).The families with the highest number of species are,in order Orchidaceae,Asteraceae and Rubiaceae,etc.The genera with the highest number of species are,in order Rubus,Ficus and Begonia,etc.The highest horizontal distri-bution for richness species is in the south of Malipo County,Xichou County,and Maguan County,with 4394,4254,and 4178 species,respectively;followed by Wenshan City in the west and Funing County in the east,with 3797 and 3522 species,respectively;and in the central-northern Qubei County,Guangnan County and Yanshan County,with the lowest species richness,with 2613,2422 and 2206 species.Vertical distribution as a whole shows the dis-tribution pattern of the"middle expansion type",with the highest species richness of 5760 species in the section of 1301-1500 m above sea level.Wenshan Prefecture has a rich diversity of rare and endangered plants,amounting to 801 species,including 295 and 35 species of wild plants under national and provincial key protection,respective-ly;26 species of wild plants are very small populations in the national level,and 37 species are very small popula-tions in provincial level;640 species of threatened species of the Red List of China's Biodiversity-Higher Plants Volume,including extremely endangered species,and 640 species with extremely endangered species.There are 640 threatened species listed in the Red List of China's Biodiversity-Higher Plants Volume,including 72 extremely en-dangered species,233 endangered species,and 335 vulnerable species.The rare and endangered plants are mainly distributed in the southern region with high species richness,which is the key protection and concern area.
wild vascular plantsrare and endangered plantsspecies compositiongeographic distributionWenshan Prefecture
万方数据
维普
