碩士 / 國立臺灣大學 / 森林環境暨資源學研究所 / 99 / With rapid global environment changes and growing human development, studying the distribution pattern of biodiversity at various spatial scales becomes a very important task to conserve biodiversity. Taiwan is an island with wide elevational range and is very suitable to study distribution of species richness along elevational gradient. Previous relevant studies in Taiwan seldom included bird species richness data below 1000 m. I conducted this study in old-growth forests from foothills to Mt. Ho-Haun (183- 3110 m a.s.l.) in central Taiwan in 2009 and 2010. I established 32 sampling stations to investigate community compositions of birds and trees along this elevational gradient. The objectives of this study were to (1) investigate the distribution patterns of primary productivity, bird density, bird species richness, tree species richness, and energy consumption of birds along elevational gradient, (2) examine the relationship between bird species richness and primary productivity, and (3) test three assumptions of energy limitation hypothesis. In this study, I estimated Leaf area index (LAI), an indicator of net primary productivity, by measuring leaf coverage. Results show that both bird species richness and LAI were hump-shaped along with the elevational gradient. However, tree species richness decreased with elevation. Results support energy limitation hypothesis and its three assumptions. I conclude that energy availability is a very important factor in determining bird species richness. In using LAI as index of primary productivity, I also discuss some corrections about the measurement of leaf coverage and the value transformation, which should be useful for future studies.
| Identifer | oai:union.ndltd.org:TW/099NTU05359036 |
| Date | January 2011 |
| Creators | Ke-Yen Huang, 黃可言 |
| Contributors | Tzung-Su Ding, 丁宗蘇 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 67 |
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