碩士 / 國立臺灣大學 / 森林學研究所 / 88 / This study focused on the change in vegetation composition during the secondary succession (0-20+ year) in the lowland Neishuangshi watershed (200-500 m), Northern Taiwan. Total of 390 plant species, 109 families were recorded from 36 plots in various ages. Two series of vegetation succession could be recognized according to geological settings, namely the sere on the volcano rocks and the one on the sedimentary rocks of Wuchihshan Formation. Based on the results from Detrended Correspondence Analysis (DCA) and Cluster Analysis (CA), vegetations in the studied area could be classified into 4 types, and each type could be further separated into 2 subtypes of various composition, as well as serial stages. Type I: Diplazium virescens - Machilus thunbergii type: developed, more than 20+ years ago, on the area of volcano rocks and ecotone. Type Ⅱ: Ficus fistulosa - Alocasia macrorrhiza type: developed, 5-13, 13-20 years on the area of volcano rocks and more than 20+ years ago on the same area at lower altitude (200-300 m). Type Ⅲ: Dicranopteris linearis - Diospyros morrisiana type: developed, 5-13, 13-20, and > 20+ years on the area of sedimentary rocks of Wuchihshan Formation. Type Ⅳ: Trema orientalis - Miscanthus floridulus type: developed, 0-5 years on the area of both rock settings. Result from this study also showed that some tree species of mid- or late-successional stages could emerge during early stages of development. Grasslands of Miscanthus floridulus, together with seedlings of tree species, could dominate the landscape of early development (0-5 and 5-13 years). Seeds of tree species could be dispersed into new sites and established during these early stages. The abundance of Miscanthus floridulus further decreased, and the canopy of tree species further developed as the secondary succession came into 13-20 years. Following secondary succession, species number and tree density could increase, and the coverage in the herb layer could also increased. Yet, the coverage in the herb layer could decrease during 13-20 years. As to the diversity, communities on the ecotone of both geological settings could have the highestα-diversity among all plant communities. And theβ-diversity of vegetation in studied area could be considered as high. In this study, support could also be found for the “ tolerance model” suggested by Connell and Slatyer (1977).
| Identifer | oai:union.ndltd.org:TW/088NTU00360045 |
| Date | January 2000 |
| Creators | Jong-Yuan Wang, 王中原 |
| Contributors | Lih-Jih Wang, Wen-Liang Chiou, 王立志, 邱文良 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 95 |
Page generated in 0.0092 seconds