碩士 / 國立中興大學 / 生命科學系所 / 103 / Phytoplankton production was the fundamental energy in coastal ecosystems. In Yunlin coastal water, notable spatial pattern in abundance and biomass of marine organisms had been described. More abundant Chinese white dolphins (Sousa chinensis), fish and invertebrates were found in southern region nearby the Xin-hu-wei Estuary. In order to clarify the relationship between primary production and distribution of organisms in Yunlin coastal water, the trophic models of Yunlin coastal water were constructed . We evaluated phytoplankton productivity every three months from 2012 to 2013 at three study sites (Ez, Dm, Ex). In addition, Ecopath with Ecosim software was used to construct three trophic models to examine energy flow from primary production to top predators. The results showed that temporal variation of daily gross production and phytoplankton composition were correlated with turbidity. Daily gross production was highest in spring when turbidity was low, and daily gross production was lowest in fall. Besides, there was clear spatial variability during spring and summer. In spring, it had lower daily gross production at Ez and Dm, while a large quantity of freshwater transported into Ez. In summer, we found there was lowest daily gross production at Dm, which might associate with decreased silicate concentration. The results showed more annual gross production at Ez and Ex. However, the annual net production value was negative at Ez and Dm, which might be caused by excess annual respiration. This indicated that northern Yunlin coastal water was a heterotrophic ecosystem. The results of the Ex model revealed that only small proportion of phytoplankton production was directly consumed by herbivores. Most of phytoplankton production flowed into the detrital pool, and was utilized by benthos. In the Ez and Dm models, phytoplankton net production was lower, and then provided less detritus to benthos. Consequently, Chinese white dolphins, benthic fish and invertebrates were abundant at Ex, because of higher phytoplankton production. According to our results, we concluded that phytoplankton production might constitute an important source of organic detritus and then influenced the biomass of Chinese white dolphins and benthos.
| Identifer | oai:union.ndltd.org:TW/103NCHU5105034 |
| Date | January 2015 |
| Creators | Ching-Wen Pen, 潘靖汶 |
| 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 | 97 |
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