Question

the diagram below shows a simple food web.
red fox
owl
black bear
rabbit
deer
berries
what would most likely happen if the rabbits were removed from the ecosystem?
a. the berry population would decrease
b. the owl population would increase
c. the deer population would go extinct
d. the secondary and tertiary consumer populations would decrease

Explanation:

In a food web, rabbits are primary consumers. If rabbits are removed:

• Option A: Berry population would increase (since less consumption by rabbits), so A is wrong.
• Option B: Owls (secondary consumers) that rely on rabbits for food would have less food, so their population would decrease, not increase. B is wrong.
• Option C: Deer have berries as a food source. Just because rabbits are removed (and deer don't compete with rabbits for food in a way that would cause extinction here - they have their own food source), deer won't go extinct. C is wrong.
• Option D: Secondary (e.g., owl) and tertiary (e.g., red - fox) consumers that depend on rabbits (either directly or as part of a complex web where the web's balance is disrupted) would have less food. So their populations would decrease.

Answer:

D. The secondary and tertiary consumer populations would decrease