翁源青云山自然保护区维管束植物区系特征分析

Flora Characteristics of Vascular Plants in Qingyunshan Nature Reserve of Wengyuan,Guangdong Province

青云山省级自然保护区位于韶关翁源县的东南部,本研究在查阅文献、历史标本的基础上,对本区进行全面踏查、标本采集并鉴定,从而进行植物物种多样性编目和区系分析。结果表明:青云山自然保护区有维管束植物1336种(含种下分类单位),其中石松类和蕨类植物132种,隶属于62属24科,裸子植物6种,隶属于4属4科,被子植物1198种,隶属于588属148科;本区的表征科主要以樟科(Lauraceae)、壳斗科(Fagaceae)、冬青科(Aquifoliaceae)等为主。植物区系地理组成复杂,主要以热带、亚热带为主,且热带、亚热带的过渡性质明显。从中国特有种的分布情况来看,该地区与湖南南部、广西东北部、江西西南部联系较为紧密,体现了南岭山脉植物区系的一致性与整体性;珍稀濒危植物共计48种;植被具有中亚热带向南亚热带过渡的特征。青云山自然保护区植物物种丰富度高、植被类型多样,建议将园洞、青山口等珍稀濒危植物分布较集中的地区列为优先保护区域。

Qingyunshan Provincial Nature Reserve is situated in southeast of Wengyuan County,Guangdong Province,China.Its plant species diversity was studied based on field investigation,literatures check and specimens collected.There were 1336 vascular plant species,including species,subspecies,varieties and forms,of which there were 132 taxa of lycophytes and ferns belonging to 62 genera and 24 families,and 6 taxa of gymnosperms belonging to 4 genera and 4 families,and 1198 taxa of angiosperms belonging to 588 genera and 148 families.The dominant and typical families of angiosperms are Lauraceae,Fagaceae and Aquifoliaceae et al.The vegetation has a certain transitional nature from Mid-subtropics to South-subtropics.According to the distribution characteristics of endemic species in China,this area is closely related to southern Hunan,northeastern Guangxi and southwestern Jiangxi,which reflects the consistency and integrity to the flora of Nanling Mountains.The plants species and vegetation types in Qingyunshan Provincial Nature Reserve are rich,in which 48 species are rare and endangered plants.In the light of the distribution features and protection status of rare plant resources in this nature reserve,it is suggested that some areas with more concentrated distribution of rare and endangered plants,such as Yuandong and Qingshankou,should be taken as priority protected areas.