Japan Geoscience Union Meeting 2016

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International Session (Poster)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-OS Ocean Sciences & Ocean Environment

[A-OS03] Marine ecosystem and biogeochemical cycles: theory, observation and modeling

Mon. May 23, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Shin-ichi Ito(Atmosphere and Ocean Research Institute, The University of Tokyo), Takafumi Hirata(Faculty of Environmental Earth Science, Hokkaido University), Eileen E. Hofmann(Old Dominion University), Charles Stock(Geophysical Fluid Dynamics Laboratory)

5:15 PM - 6:30 PM

[AOS03-P12] Internannual Variability of Summer Phytoplankton Community in the East China Sea

*Joji Ishizaka1, Qian Xu2, Chiho Sukigara1, Takeshi Matsuno3, Sinjae Yoo4 (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.Graduate School of Environmental Studies, Nagoya University, 3.Research Institute for Applied Mechanics, Kyushu University, 4.Korea Institute of Ocean Science and Technology)

Keywords:phytoplankton, river water, nutrients

Interannual variability of summer phytoplankton community was examined with HPLC pigments in 2009, 2010, 2011 and 2013. On 2009 and 2013, diatom was dominated in high chlorophyll-a water, while on 2010 and 2011 smaller phytoplankton was dominated. It is expected that influence of high nitrate Changjiang river water was stronger on 2010 and 2011, while phosphate amount was higher in 2009 and 2013 and coastal upelling may stronger. The sourse of nutrients may be the cause of the dominance of different phytoplankton groups.