宣城市国家重点保护野生植物的分布特征

依据《第二次全国重点保护野生植物资源调查名录》,利用实测法和样方法在宣城市范围内进行实地调查,确定该市重点保护野生植物名录,并对其分布特征进行深入分析。结果表明:(1)本区有国家重点保护野生植物17种,隶属于12科16属,其中,国家一级保护植物3种,国家二级保护植物14种;(2)本区重点保护野生植物起源古老,特有成分多;以东亚和北美洲间断分布、中国特有分布为主;温带成分占主导,且中国特有成分丰富;(3)水平分布不均,物种多度由多到少为绩溪宁国宣州泾县、旌德郎溪、广德,垂直分布集中在海拔200~1 000 m常绿落叶阔叶混交林中;(4)4种分布格局,多呈单株或零星分布。

The distribution of national key-protected wild plants in Xuancheng

According to the Second Survey List of National Key Protected Wild Plant Resources of China, we carried out a field survey in Xuancheng using the measurement and quadrat sampling methods to determine the list of local protected wild plants and analyze their distribution characteristics in depth. The main findings were as follows: 1) in Xuancheng area, there are 17 national key protected wild plant species, belonging to 12 families and 16 genera in which three are first-grade national protected plants and 14 are second-grade national protected plants; 2) these plants were ancient origin with many special species, mainly discontinuously distributed in East Asia, North America and China in dominant flora types, which showed strong temperate characteristics, and many of them only distributed in China; 3) the geographic distribution of the key protected wild plants was uneven, and the descending order of species abundance was Jixi > Ningguo > Xuanzhou > Jingxian, Jingde > Langxi, Guangde. The vertical distribution of the protected plants was concentrated in the range of 200-1000 m; 4) there were four distribution patterns of these protected plants. The single or sporadic distribution was the dominant type.