碩士 / 中興大學 / 生命科學系所 / 99 / Food sources of the Formosan salmon in the Cijiawan Stream would be influenced by discharge variation causing by seasonal rainfall. The aim of this study was to explore the colonization of epilithic algae at different spatial scales in the Cijiawan Stream. The developments of algal biomass, community composition and diatom abundance during colonization were monitored. Rubbles were set in riffle and pools in the Cijiawan Stream in winter and summer for 28 days. Epilithic algae and aquatic insects were collected and environmental factors ware measured by an interval of two days. The results showed that the algal biomass were higher in summer both in the riffle and pools. The algal biomass in the riffle in winter and summer was 21.01 mg m-2 and 40.96 mg m-2, respectively. They achieved a similar amount of biomass in the field at the 26th day. However, algal biomass in the pool in winter and summer were both lower than that in the field. They achieved a maximum biomass at the 28th, 22th day. The aquatic insect biomass and current velocity were found to affect the epilithic biomass in the riffle and pool. Regardless of season and mesohabitat, diatoms were the dominant algal species, especially low-profile guild, which was most abundance at the front, medium and back positions of rubbles. The abundance contributed total abundance > 50 %. Overall, aquatic insects and current velocity were the major influence factors on the biomass at different spatial scales.
| Identifer | oai:union.ndltd.org:TW/099NCHU5105089 |
| Date | January 2011 |
| Creators | Zih-Cin Lin, 林資沁 |
| Contributors | Hsing-Juh Lin, 林幸助 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 88 |
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