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

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

*石坂 丞二¹、徐 倩²、鋤柄 千穂¹、松野 健³、ユ シンジェ⁴ (1.名古屋大学宇宙地球環境研究所、2.名古屋大学大学院環境学研究科、3.九州大学応用力学研究所、4.韓国国立海洋科学院)

キーワード：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.