Impacts of Changjiang River flood on phytoplankton community structure in the East China Sea

• Main Authors: Chi-Lin Wu, 吳佳霖
• Other Authors: Tung-Ming Hsiung
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/70935077975805851393

碩士 === 國立臺灣海洋大學 === 生物科技研究所 === 99 === Basis of the analytical results of the cruise OR1-932（July, 2010）, this thesis discuss the impact of Changjiang River flood on phytoplankton community structure in the East China Sea. Assuming the water had salinity less than 31 psu was the notice of flood spreading, only 6 stations had salinity less than 31 psu for total 34 stations’ surface water samples in OR1-870（July, 2008）. However, there were 19 of total 37 stations in which salinity less than 31 in cruise OR1-932. That is to say, the Changjiang River flood severely impact the East China Sea in July, 2010. For the specific division of algal contribution for total chlorophyll a （TChla）, the bacillariophyceae（diatoms）presented much more fraction in OR1-932 compared to OR1-870. Nevertheless, the TChla contribution fraction of cyanophyta decreased in OR1-932 relative to OR1-870. As a result, Diatoms were the dominant algae in low salinity environment and the fraction of cyanophyta for TChla increased in high salt environment. Because the chlorophyll b and zeaxanthin were marker pigments for both prochlorophyceae and chlorophyceae, CHEMTAX program may lead to prochlorophyceae existed in inshore water if the pigment initial ratio were all set 1 in chlorophyll a column. If one set ratio 1 for prochlorophyceae versus divinyl chlorophyll a, and set ratio 1 in chlorophyll a column for other algal division, its outcome was more accurate.