| Summary: | 碩士 === 國立屏東科技大學 === 森林系所 === 102 === Since information on the environmental factors affecting their diversity and structure is scanty, this study had the aim of investigating variation in liana diversity and structure among different topographies, and the environmental factors influencing them conducted in Tajen Experimental Forest Station, southeastern Taiwan. Three topography habitats (ridge, slope and valley) were selected and twenty plots (20 m #westeur024# 20 m) were sampled in each habitat to examine liana diversity; liana of 1.3 m in height (from the roots) and ≧0.5 cm diameter at breast height (dbh) were counted. Climbing mechanisms of lianas and 15 environmental factors were also determined. Canonical correspondence analysis and Monte Carlo permutation test were used to extract the significant environmental factors to explain the relationships among liana diversity and environmental factors. The results showed that 29 families including 44 genus and 51 species of lianas were recorded. Liana species richness, abundance and basal areas among three habitats followed the order: slope habitat＞valley habitat＞ridge habitat. Dominant species focused on a few species such as Erycibe henryi, Fissistigma glaucescens, Morinda umbellata, Mussaenda pubescens, Stauntonia obovatifoliola, and etc. The families showing the most diversity in terms of the number of species were Apocynacese and Rubiaceae. Six climbing mechanisms were recognized, among them, 26 species with twiners stem (50%) at most, followed by seven species with hooks and adventitious (14%). Altitude, topography, aspects and rocks were related to liana diversity, abundance, basal area and diameter. Liana diversity and structure varied between habitats, and this study provided the factors influencing liana component.
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