An ecology student has been working on Isle Royale. Over the 5 years that this student has been studying the wolves and moose on this island, the wolf population has decreased dramatically. During this time, what can this student deduce happened in the moose population during those same 5 years?

1. The moose population likely demonstrated a positive growth rate.
2. The moose population likely increased in size.
3. The moose population likely decreased in size and demonstrated a negative growth rate.
4. The moose population likely remained the same size.

Question

21-02-2025
Biology

High School

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An ecology student has been working on Isle Royale. Over the 5 years that this student has been studying the wolves and moose on this island, the wolf population has decreased dramatically. During this time, what can this student deduce happened in the moose population during those same 5 years?

1. The moose population likely demonstrated a positive growth rate.
2. The moose population likely increased in size.
3. The moose population likely decreased in size and demonstrated a negative growth rate.
4. The moose population likely remained the same size.

Answer :

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apoorvav306 apoorvav306 · Answer 1 · 2025-05-27T05:44:35-04:00

The decline in wolf population on Isle Royale would typically increase the moose population since wolves are a keystone species and their decrease can lead to less predation pressure on moose. The moose population likely increased in size. thus, the correct answer to the student's question is option 2) The moose population likely increased in size.

When studying the dynamics of wolf and moose populations on Isle Royale, the decrease in wolf population over 5 years would likely have led to a corresponding increase in the moose population. This is because wolves are a keystone species and play a critical role in maintaining the structure of an ecosystem. When a keystone species' numbers decrease, it can increase the populations of species they prey upon, due to reduced predation pressures.

In Yellowstone National Park, for instance, the reintroduction of wolves changed elk behavior and had positive impacts on the vegetation and other species in the ecosystem. Therefore, with fewer wolves preying on moose on Isle Royale, it is reasonable to deduce that the moose population likely increased in size, which corresponds to options 1 and 2 in the question provided.

In the context of population dynamics, the decrease in predators often results in a higher growth rate and an increase in the size of the prey population. However, these changes are subject to many factors, including the carrying capacity of the environment, availability of resources, and competition with other species.

Yet, the basic predator-prey relationship suggests that as the number of predators falls, prey species have more opportunity to thrive. thus, the correct answer to the student's question is option 2) The moose population likely increased in size.