NUTRIENT-PLANKTON INTERACTION WITH A TOXIN IN A VARIABLE INPUT NUTRIENT ENVIRONMENT
A simple model of phytoplankton-zooplankton interaction with a periodic input nutrient is presented. The model is then used to study a nutrient-plankton interaction with a toxic substance that inhibits the growth rate of phytoplankton. The effects of the toxin upon the existence, magnitude, and stability of the periodic solutions are discussed.