碩士 / 國立臺南大學 / 環境生態研究所碩士班 / 99 / Stream habitat is an important factor affecting stream fish assemblages. The goal of this study was to understand the relationships between stream habitats and fish assemblages in Kaoping River Basin. Thirty wadeable stream sites, ranging from 38 to 553m elevation, were selected for sampling. Fishes were collected and habitat was surveyed in March and December 2010. Site characteristics included watershed, stream corridor and in-stream scales, and the basins, valley types and channel geomorphic. Classification 9 categories, watershed, channel morphology, water quality, canopy, substrate, fish cover, habitat unit, riparian vegetation, human disturbance, and 102 variables were surveyed to characterize sites.
The number of fish species were negatively correlated with elevation. longitudinal variations was the dominant factor affecting fish assemblages and stream habitats. In-stream scale habitat variables explained 63.6% of fish assemblages, watershed scale habitat variables explained 43.7% of fish assemblages, stream corridor scale habitat variables explained 31.8% of fish assemblages. Cluster analyses separated sites into 6 groups, and elevation, velocity, habitat unit and water temperature were important factors to fish assemblages in redundancy analysis. There were significant differences in habitats, channel reach and indicator species among tributaries. Fish assemblages changed with stream habitat shifts. Some species moved seasonally. We proposed that the longitudinal movement of fish was correlated with habitat recovery, reproduction and engineering work of streams.
| Identifer | oai:union.ndltd.org:TW/099NTNT5587027 |
| Date | January 2011 |
| Creators | Ruei-lin Guo, 郭瑞霖 |
| Contributors | none, 王一匡 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 76 |
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