碩士 / 國立臺灣大學 / 生態學與演化生物學研究所 / 101 / Diatom communities are often used as bio-indicators in reflecting water quality of the contemporary environment and for the reconstruction of the paleoenvironmental conditions. Also, the biogeography of diatoms has been studied and used in some applications. However, little is known about the biogeographic pattern of diatoms in Taiwan. The objectives of this study were to analyze the biogeographical pattern of diatom communities along the Tamsui River of northern Taiwan, to elucidate their site-specificity, and to assess its applicability as trace evidences of locality. Both the benthic and planktonic diatoms were collected from April 2010 to July 2012, covering those from five tributaries and 4 seasons. For each season, samples were taken both at ebb and flow tides. The ecological guilds and niche guilds at these sites were elucidated, based on the community data. The correlation of these data with geographic information and water quality were analyzed. From the 8 sampling events, 224 diatom species from 53 genera were recorded. Navicula and Nitzschia were the dominant genus with 56 and 42 species, respectively. The diatom community structures were affected by the tides, showing that the abundance of Centricae and planktonic diatoms were positively correlated with the distance to the estuary. Mechanisms behind that could be the effects of salinity and water depth. The results showed that the diatom communities exhibited a site-specificity and a seasonal variation pattern. The present study suggests that the diatom communities could serve as trace evidences in different areas of applications.
| Identifer | oai:union.ndltd.org:TW/101NTU05110116 |
| Date | January 2013 |
| Creators | Chuan-Ling Chou, 周傳鈴 |
| Contributors | Jiunn-Tzong Wu, 吳俊宗 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 104 |
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