| Summary: | 碩士 === 國立東華大學 === 自然資源管理研究所 === 92 === For 100 years, the phytogeographists of England, Japan, Taiwan and Mainland China, they regard Taiwan as a phytogeographic region with particular significance. Among floristic and geographic elements in Taiwan are complicated with condense pantropic, temperate zone, Asia, Northeast Asia, Himalayas and endemic geographic distribution partterns.
This study took floristic research method, to analysis the pteridophytic flora of Taroko National Park includes of 29 families, 106 genera, and 319 species of ferns. The characteristics are determined as follow: First, the geographic distribution of this flora with diversity and abundant; Second, the diversity of fern is abundant from basic to high level species; Third, with abundant Taiwan endemic species, are 13％ of the total species, it announced the endemism of species, not of genera.
Assaying the vertical distribution of the ferns of Taroko National Park, the maximum species found in warm-temperate broad-leaved forest, are 40％ of the total species in this area,which is the richest and various of fern specied in Taroko National Park.
Analaysis the relationship of the pteridophytic flora between Taroko National Park and Central-China, South-China and Southwest-China in mainland China through co-relation coefficient statistic method. Result shows the coefficient of similarity of species, Taroko National Park and Dujiangyan Region, Sichuan Province, Hengduan Mountains, Yunnan Province are the closest, the coefficient of similarity of genera is 52.17, 50.01.
In addition, to cover the coefficient of similarity of species, Taroko National Park and Dujiangyan Region, Sichuan Province, Chiuwan Mountain Natural Reserve Area, Kwanghis Province, and Chishui Alsophila Natural Reserve, Kweichow Province are the most smililar, the coefficient of similarity of species is 31.34, 28.67, 50.01.
The result of the coefficient analys of similarity of genera and species in Dujiangyan Region, Sichuan Province is allied more closely to Taroko National Park.
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