碩士 / 國立臺灣海洋大學 / 海洋環境化學與生態研究所 / 103 / Coccolithophores are a group of single-celled phytoplankton that play a role of primary producer in the oceans.Different from other phytoplanktons, coccolithophores not only can photosynthesize to absorb CO2 through photosynthesis but also can produce coccolith through calcification.The growth process of Coccolithophores yields calcium plate or cocoliths,which are deposited on the seafloor.Since the industrial revolution in 18 century,human activities through burning fossil fuels produce huge amount of carbon dioxide,resulting in increasing CO2 concentration from 280 ppm before the industrial revolution to 400 ppm now (NOAA). The rapid increase in atmospheric carbon dioxide concentration affects the growth of coccolithophores .This study investigated the summer distributional dynamic of coccolithophores in the East China Sea .Based on samples taken from 31 station during a cruise from July 15-30 2014.Using scanning electron microscope (SEM) we observed the species composition and abundance of coccoltihores. Based on the morphology of coccoliths, 38 species of coccolithpohores were identified. The species richness was highest,in Kuroshio and Yellow Sea water masses, medium in The East China Sea continental shelf center, and lowest in the Yangtze River diluted water.The species richness is positively correlated with salinity.On the East China sea continental shelf species was decreased by the Yangtze River diluted water, indicating that coccolithophores are probably brought in to this area by the Kuroshio or Yellow Sea water masses.The abundance of coccolithophores in the East China Sea surface water layer was about 3.7 ×103cells L-1 ~ 8.28×104 cells L-1, lower in the surrounding shelf water than in the center of the shelf..Based on the similarity analysis three main groups of coccolithophores were distinguished.Emiliania huxleyi dominated in the East China Sea continental shelf,Gephyrocapsa oceanica dominated in coastal area, and Umbellosphaera tenuis at the shelf edge.
| Identifer | oai:union.ndltd.org:TW/103NTOU5282006 |
| Date | January 2015 |
| Creators | Lu, Hsin-Ming, 盧信名 |
| Contributors | Chiang, Kuo-Ping, 蔣國平 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 44 |
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