Aimed at the hot point of the eutrophication of culture water and according to the field surveys in the Jiaozhou Bay and the research on dynamic model, the distributions and variations of DIN and DIP, controlling mechanisms and the influences to environment are analyzed in this thesis, and the ecological regulation of the Co-culture of Shellfish and Seaweed to water environment is also preliminary discussed. This research would give some necessary scientific foundations for the research on the environmental...