Jin Haiyan (Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, China).

In the East China Sea, Changjiang Diluted Water (CDW) influenced area was characterized as eutrophic area with high anthropogenic nutrients inputs. Nitrate concentration increased 6 times during the last 50 years from ~30 umol/L to ~150 umol/L.While the increase of silicate and phosphate are not so obviously. Nutrients levels and ratios effects the phytoplankton growth and the structure of phytoplankton communities. Moreover, high biomass of diatom in the upper layer coupled with the hypoxia in the bottom water. Time series observation was also set up to get the information of the effects of typhoon events on the marine ecosystem response in the East China Sea.