Study on the Character of Equilibrium Point and Its Impact on the Changing Rate of Phytoplankton Concentration Using a Simple Nutrient-Phytoplankton Model

摘要

This study is focused on the equilibrium point, which is the value when phytoplankton concentration is unchanged with time, of phytoplankton concentration. The changing rate of phyto-plankton population and the character of equilibrium point were studied using simple Nutrient-Phytoplankton mathematical model. The results indicated that under certain environment conditions phytoplankton concentration meets with the equilibrium point at the end and the differences between the equilibrium point and the concentration of phytoplankton determine the changing rate of phytoplankton concentration. The equilibrium point is essentially dependent on the environmental factors. In this paper, it is used to explain the phenomenon of red tide. The environmental factor, nutrient, was the only factor concerned in the work.