中国竹亚科特有属区系地理的数值研究 Ⅱ.区系成分的模糊分析

ANUMERICAL STUDY ON THE FLORISTIC GEOGRAPHY OF THE ENDEMIC GENERA OF CHINESE BAMBUSOIDEAE—FUZZY ANALYSIS OF THE FLORISTIC ELEMENTS

本文应用模糊分析方法研究了中国竹亚科特有属植物区系地理成分;12个特有属归为华夏(占总属数的16.67％)、西南(占41.67％)、华南(占33.33％)和华东(占8.33％)四种成分;所含72个种划分为西南(占总种数的40.28％)、华南(占33.33％)、华东(占15.28％)和华中(占9.72％)四种成分。其结果再次证实了“西南至华南尤其西南地区是中国竹亚科特有属甚至竹亚科及其区系的起源地带”一观点。此外,本方法获得的结果还能以定量的形式准确地表达各植物区系地理成分之间的亲缘关系及其程度。

The elements of the floristic geography of the endemic genera of Chines Bambusoideae have been studied with the fuzzy analysis method. The 12 endemic genera of Chinse Bambusoideae can be divided into four elements of floristic geography, i. e. Cathaysia (16.67% of the total in China), Southwest China(41.67%), South China (33.33%),and East China (8.33%); and the 72 species from the 12 endemic genera can also be divided into four ones accordingly, i. e. Southwest Cina (40.28%), South China (33.33%), East China (15.28%), and Central China (9.72%). The divisive conclusions of the elements of floristic geography have futher corroborated the opinion that 'Southwest China and South Cina, especially the former, are probably the origin areas of the endemic genera of Chinese Bambusoideae even the whole Bambusoideae plants'. Besides, the conclusions obtained from the fuzzy analysis can accurately describle what the relationships are and how they are related among the elements of floristic geography through a quantitative way, which can't be obtained from the classical method.