Analyses on distribution characteristics and conservation status of medicinal vascular plants in Jiangxi Province

作者 Shan Zhangjian; Que Ling; Chen Shunan; Zhang Xinxin; Cao Lan; Mu Zejing

期刊 Journal of Plant Resources and Environment , 2020,3:29

摘要 Based on the list and ex situ cultivation data of medicinal vascular plants in Jiangxi Province and combined with some field investigation results,number,distribution pattern,and ex situ conservation status of medicinal vascular plants in Jiangxi Province were analyzed by using GIS layer overlay analysis and Dobson algorithm methods.The results show that there are 2 620 species of medicinal vascular plants belonging to 972 genera of 194 families in Jiangxi Province,including 2 522 species of angiosperms belonging to 912 genera of 165 families,28 species of gymnosperms belonging to 19 genera of 5 families,and 70 species of pteridophytes belonging to 41 genera of 24 families;families containing more species include Asteraceae,Fabaceae,Rosaceae,Lamiaceae,Poaceae and Orchidaceae,etc.,and genera containing more species include Rubus Linn.Polygonum Linn.,Lysimachia Linn.,Ilex Linn.and Clematis Linn.,etc.Regarding the distribution pattern,there are 1 206-1 968 species of medicinal vascular plants in 94 counties (cities,districts) of Jiangxi Province,in which,there are more species in counties (cities,districts) of mountainous area,while less species in counties (cities,districts) of north-central plain area.The distribution hotspots recognition result shows that taking total species number of medicinal vascular plants in Jiangxi Province as basic data,when species number accounting for 75%,the distribution hotspots only include Jinggangshan City and Zixi County,and national nature reserves are set up in these 2 counties (cities);when species number accounting for 100%,the distribution hotspots include 40 counties (cities,districts),in which,national or provincial nature reserves are set up in 30 counties (cities,districts),and there are 2 538 species of medicinal vascular plants in these hotspot counties (cities,districts),accounting for 96.9% of total species number of medicinal vascular plants in Jiangxi Province.At present,there are 1 705 and 915 species of ex situ cultivated and non ex situ cultivated medicinal vascular plants,accounting for 65.1% and 34.9% of total species number,respectively;there are 24 threatened species among non ex situ cultivated species,including 2 critically endangered species,7 endangered species and 15 vulnerable species.The comprehensive analysis result shows that distribution pattern of species number of medicinal vascular plants in Jiangxi Province shows a tendency of gradually decrease from mountainous area with higher altitude to plain area with lower altitude,and mountainous area with higher altitude is the key area for the conservation of medicinal vascular plant resources,meanwhile,establishing nature reserve is crucial for maintaining the richness of medicinal vascular plants in Jiangxi Province.Based on the results,in situ conservation should be strengthened and attention should be paid to ex situ conservation of key species to conserve wild medicinal vascular plant resources in Jiangxi Province.

涉及物种 珍珠菜属 Lysimachia 悬钩子属 Rubus 蓼属 Polygonum