Please take a look at the video lessons on The Scientific Way of Thinking to understand how VERA supports scientific modeling.

Competitive Exclusion Model

This is a model of competitive exclusion. Which is when one competitor is more efficient in either gaining access to the resource or using the resource, so they thrive while the other competitor dies out. The two competitors are aboilus zebra (zebra) and ammodorcas clarkei (Clark's Gazelle).

In the ecosystem, the zebra outcompetes the gazelle for the shared resource of grass. The zebra has a longer lifespan, higher grass consumption rate, larger starting population, and larger offspring count. All of these factors make the zebra a better competitor than the gazelle. The zebra population grows toward logistic growth and the gazelle population flat lines over time.

In VERA, make the starting population, offspring count, and consumption rate higher for the zebra than the gazelle. This makes the zebra a better competitor and more likely to use resources efficiency. Also make sure the grass starting population is large since the grass is the food source for both the zebra and gazelle. Double check the lifespan, reproductive maturity, and reproductive interval values for both the zebra and the gazelle.

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