高黎贡山南北段种子植物区系比较研究

为了解高黎贡山的种子植物资源,采用植物区系研究原理和方法,将高黎贡山南段与北段种子植物区系进行对比分析。结果表明,南段有192科878属2807种植物,种可分为15个分布类型9亚型14个变型;北段有172科778属2816种植物,种可分为15个分布类型9亚型20个变型。通过比较科属分化程度、数量构成及古热带成分比例等,南段区系具有较为古老和保守的特点,而北段植物区系具有较为年青和新生的特点。回归分析显示南北段区系地理成分相似度较高,而科属相似性却因分化在逐级降低。

Comparative Study on Seed Plant Flora between Southern and Northern Gaoligong Mountains

In order to understand the seed plant resources in Gaoligong Mountains, the seed plant flora between the southern and the northern Gaoligong Mountains were compared by using floristic theories and methods. The results showed that there were 2807 species, belonging to 192 families and 878 genera in the southern Gaoligong Mountains, and could be divided into 15 areal-types, 9 subtypes and 14 forms at species level. There were 2816 species, belonging to 172 families and 778 genera in the northern Gaoligong Mountains, could be divided into 15 areal-types, 9 subtypes and 20 forms at species level. From the differentiated degree, quantitative composition, and the ratio of palaeotropic components of families and genera, it was indicated that the southern flora was ancient and conservative, while the northern flora was young and newborn. The regression analysis showed that the southern flora and the northern flora were quite similar in geographical components, while the similarities of families and genera were gradually descending due to differentiation.