Special Session 29: Reactions diffusion equations with applications to spatial ecology and infectious disease

Modelling Phytoplankton-Virus Interactions: Phytoplankton Blooms and Lytic Virus Transmission

Junping Shi
College of William & Mary
USA
Co-Author(s):    Jimin Zhang, Yawen Yan
Abstract:
A dynamic reaction-diffusion model of four variables is proposed to describe the spread of lytic viruses among phytoplankton in a poorly mixed aquatic environment. The basic ecological reproductive index for phytoplankton invasion and the basic reproduction number for virus transmission are derived to characterize the phytoplankton growth and virus transmission dynamics. The theoretical and numerical results from the model show that the spread of lytic viruses effectively controls phytoplankton blooms. This validates the observations and experimental results of Emiliana huxleyilytic virus interactions. The studies also indicate that the lytic virus transmission cannot occur in a low-light or oligotrophic aquatic environment.