碩士 / 國立臺灣師範大學 / 生命科學研究所 / 92 / The purpose of this thesis is to study the spatial and temporal variations of the phytoplanktonic composition and to understand the potential regulatory factors that effect on species composition of phytoplankton in the Nan-Wan Bay, Southern Taiwan. The Nan-Wan Bay, a semi-closed bay, has been recorded a local upwelling for a long time. In general, the seasonal or climatic upwelling lifts the deep-nutritional water to the surface layer of ocean; in addition, this upwelling is likely to change the growth and the composition of phytoplankton. Samples were collected on board R/V Ocean Research I and Ocean Research III during November 2002 to June 2003. Composition of phytoplankton was distinguished by using the pigments. Other measured variables including temperature, salinity, dissolved inorganic nutrients, particulate organic carbon (POC), dissolved organic carbon (DOC), as well as bacterial production (BP). Results showed that the major pigments of phytoplankton, except Chlorophyll a, in the Nan-Wan Bay are Chlorophyll b, Zeaxanthin, Fucoxanthin, and 19’-hexanoyloxyfucoxanthin, which stand for Chlorophyceae, Cyanophyta, Bacillariophyta, and Prymnesiophytes, respectively. Seasonally, concentration of Chl a was the highest in winter with mean ± sd values of 0.44 ± 0.04 mg Chl m-3, intermediate in autumn (0.30 ± 0.06 mg Chl m-3) and in summer (0.30 ± 0.08 mg Chl m-3), and the lowest values in spring (0.19 ± 0.08 mg Chl m-3). As for phytoplankton composition, previous four classes of phytoplankton almost contributed equally in biomass in autumn. The highest composition ratio of phytoplankton was found in Chlorophyceae (33%), intermediate in Prymnesiophyceae (27%) and in Baciliariophyta (23%), and the lowest ratio in Cyanophyta (16%). Cyanophyta, however, contributed more than 58% of phytoplankton composition in spring. In summer, the composition ratio of Chlorophyceae, Cyanophyta, Prymnesiophyceae, and Bacillariophyta was 39 %, 34%, 19%, and 8%, respectively. Further analyses suggested that growth and composition of phytoplankton might be affected by nutrients and temperature. Besides, significant relationships were observed between phytoplankton biomass versus POC and DOC. Since bacterial production was significantly related with organic carbon, it suggests that BP might be affected indirectly by phytoplankton in the Nan-Wan Bay.
| Identifer | oai:union.ndltd.org:TW/092NTNU0112014 |
| Date | January 2004 |
| Creators | Chia-Li Chao, 趙家儷 |
| Contributors | Chung-Chi Chen, 陳仲吉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 78 |
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