Analysis of grey model between seawater environmental essential factors and phytoplankon dynamics in the Dapeng Bay, the South China Sea

The relation between the dynamics of phytoplankton and essential environmental factors of seawater has been studied. According to the comparison between environmental factors of seawater, and on the basis of mathematical space theory and the four principles of normalization, even symmetry, globality and proximity, smoothing discrete function, the grey derivative and the grey differential equation have been defined, the grey models and relation to the factors (the seawater physical and chemical factors) were estimated. The calculation results indicate that zooplankton. Mn, Fe and dissolved oxygen are the most important factors.