The Wolves of Yellowstone

What were the effects of reintroducing the wolves back to Yellowstone National Park?

• The deer started to die out and became endangered

• The wolves started to die out and become endangered

• The ecosystem balanced itself with a healthy predator-prey relationship

• The ecosystem was unbalanced

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In order to have a trophic cascade you must have the following:

• producer

• consumer

• neither

• both

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When the wolves were absent from the park due to over hunting, the following DID NOT take place:

• erosion of the river bank caused fish to die

• the deer population more than doubled resulting in sick animals

• the populations of mice and rabbits decreased

• the beavers were able to built dams

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If there was a major drought at Yellowstone causing many plant species to die, the following would happen:

• the deer and wolf populations would go down

• the deer and wolf populations would go up

• the deer population would go up; the wolf population down

• the deer population would go down, the wolf population up

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What year were wolves probably introduced back into Yellowstone Park?

• 1994

• 1995

• 2000

• 2002

• 2005

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