In the previous activity, you probably weren't able to find a way to stabilize the ecosystem for 300 ticks. That is perfectly fine! In fact, it is not possible to make that ecosystem stable over long periods of time. In order to do that, there need to be some changes to the model itself, which you will explore next.
The second variation includes plants in addition to wolves and moose. The behavior of the wolves is identical to the first variation, however this time the moose must also eat plants in order to maintain their energy, and if they don’t they will die. Plants that are eaten by moose will regrow after a fixed amount of time depending on the plant regrowth time slider.
Select "moose-wolves-plant" in the model version dropdown menu. Keep all other settings the same.
Hit "setup" and "go" to start the simulation. Let the simulation run for 300 ticks before pausing the simulation by hitting "go" again and answering the questions.
