High School

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Which populations on Isle Royale increase and decrease together?

A. Wolves and trees
B. Wolves and moose
C. Moose and trees
D. Wolves, moose, and trees
E. No similar trends exist.

Answer :

Final answer:

The populations that increase and decrease together on Isle Royale are b) wolves and moose, as they exhibit a predator-prey relationship that results in fluctuating population cycles.

Explanation:

From the scenario on Isle Royale, we are examining the interactions within an ecosystem, specifically between predators and their prey, as well as the impact on vegetation. In this ecosystem, the populations that increase and decrease together are the wolves and moose.

Wolves are the predators, and moose are their primary prey. As the wolf population increases, they hunt and reduce the moose population, leading to a subsequent decrease in the wolf population due to a shortage of food. Conversely, when the wolf population is low, the moose population tends to increase because of reduced predation pressure, which can eventually lead to an increase in the wolf population as their food source becomes more abundant.

This is a classic example of a predator-prey cycle, where the predator and prey populations fluctuate in response to each other.

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