Stability and Selective Harvesting of a Phytoplankton-Zooplankton System

Figure 4

The stability of the equilibrium 𝑆₂. (a) The equilibrium 𝑆₂(0.8,4.10,0) is locally asymptotically stable when 𝑘=5.5<5.6. (b) The equilibrium 𝑆₂(0.8,4.25,0) exhibits a Hopf bifurcation when 𝑘=7>5.6.

(a)

(b)