Abstract:Based on the multi species culture ecosystem model in Sanggou Bay, the annual variation cycles and seasonal distributions of phytoplankton biomass and dissolved inorganic nitrogen (DIN) concentration were simulated. Model results indicated that the seasonal aquaculture activities made seasonal variations of DIN concentration and biomass of phytoplankton more prominent. The distributions of DIN and phytoplankton biomass were mainly influenced by the aquaculture scenarios. During the period of kelp culture, DIN from the open sea is an important source of nutrient supporting the growth of kelp, due to the exchange of water.
