茂兰保护区单座苣苔群落维管束植物区系调查

Vascular Plants Community of Metabriggsia ova lifolia in Maolan Nature Reserve in Guizhou

为了解贵州茂兰自然保护区单座苣苔资源现状,于2019年3月—2021年2月,采用样线和样方相结合的方法,对该保护区单座苣苔群落植物的区系组成、区系地理成分进行统计与分析。结果表明:保护区单座苣苔群落共有维管束植物287种,隶属于88科195属,其中蕨类植物12科16属18种,裸子植物2科4属4种,被子植物75科173属265种;在科级水平上,热带分布科占51.95%,温带分布科占20.78%,热带成分明显占优;在属级水平上,热带分布属占62.70%,温带分布属占33.35%,热带成分明显占优。表明单座苣苔群落维管束植物区系具有明显的热带-亚热带性质,呈现出热带向温带过渡的特点,并具有热带北缘的特点。

In order to understand the current situation of the resources of Metabriggsia ovalifolia in Maolan Nature Reserve of Guizhou,from March 2019 to February 2021,using the method of combining line transect and quadrate,based on field investigation and related materials,floristic composition,geographical components.The results showed there were a total of 287 species of 195 genera in 88 families in Maolan Nature Reserve,among which there were 18 fern species belonging to 16 genus 12 family,4 gymnosperm species belonging to 4 genera,2 families,and 265 angiosperm species belonging to 173 genera,75 families.The floristic compositions and characteristics were analyzed.The results showed that tropical elements and temperate elements covered 51.95%and 20.78%of total families respectively.Obviously,the tropical elements were dominant on the family level.On the genus level,tropical elements and temperate elements covered 62.70%and 33.35%of total genera respectively,which was the least.It indicates the vascular flora of the unicornis community,the flora of Maolan Nature Reserve basically consisted of tropical to subtropical elements with transitional characteristics from tropical to temperate.