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Assessment
What is a keystone species?
A species that has a disproportionately large effect on its environment relative to its abundance.
A species that is the most numerous in an ecosystem.
A species that is the top predator in a food chain.
A species that is a major source of food for humans.
Which of the following is an example of a keystone species?
Beavers
Rabbits
Sparrows
Field mice
What happens when a keystone species is removed from an ecosystem?
The ecosystem may experience dramatic changes or collapse.
The ecosystem will remain stable and unchanged.
Only the population of that species will change.
All species will adapt to fill the gap left by the keystone species.
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