magine that an ecosystem contains rabbits, foxes, wolves, and deer. The following predator-prey relationships exist:

Rabbits are eaten by foxes and wolves

Deer are eaten by wolves

Foxes are eaten by wolves

Select the animal whose absence would have the greatest negative effect on the ecosystem.

(1 point)
Responses

rabbit
rabbit

deer
deer

fox
fox

wolf

1 answer

To determine which animal's absence would have the greatest negative effect on the ecosystem, let's analyze the roles and relationships of each animal:

  1. Rabbits: They are prey for both foxes and wolves. Their absence would primarily affect the populations of foxes and wolves, potentially leading to an increase in competition between those two predators.

  2. Deer: They are prey for wolves. The absence of deer would mainly affect wolves, but deer do not significantly impact other species in the ecosystem.

  3. Foxes: They are predators of rabbits and prey for wolves. If foxes were absent, rabbit populations might increase significantly, which could lead to overgrazing and negatively impact vegetation.

  4. Wolves: They are apex predators. Their absence would lead to an unchecked increase in both rabbit and deer populations, which could result in overgrazing and depletion of plant resources. Additionally, without wolves, fox populations could grow unchecked, further complicating the balance.

Considering these relationships, the absence of wolves would have the most significant negative effect on the ecosystem. Wolves play a critical role in controlling the populations of both rabbits and deer, maintaining the balance of the ecosystem. Therefore, the answer is:

wolf