A phase-plane plot of predator vs. prey density traces a closed loop.
A closed (non-shrinking) trajectory in the phase plane indicates:
- A
Damped oscillations to extinction
- Bcheck_circle
Neutrally stable cycling around an equilibrium point
- C
Exponential growth of both species
- D
Carrying capacity has been reached
Explanation
A closed orbit in the predator-prey phase plane represents persistent oscillations of both populations around a neutral equilibrium.