What are three ways the ecosystem was impacted by the absence of wolves

• The Elk population decreased

• Tree populations decreased

• Small animal populations decreased

• Beaver populations deceased

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A trophic cascade is when an apex predator has a positive impact on all the species that are below it on the energy pyramid

• True

• False

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What year were the wolves reintroduced to Yellowstone

• 2006

• 1967

• 1995

• 1975

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A keystone species is...

• An animal that has keys

• An animal that lives in a niche

• An animal that supports and enables other species

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What are two Keystone species in Yellowstone

• Rabbits

• Beavers

• Wolves

• Bears

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Wolves impacted what when they were reintroduced (3 Answers)

• They helped trees grow

• They decreased the bear populations

• They decreased the elk population

• They increased the beaver population

• They decreased the rabbit population

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What features intertwine to makeup biodiversity (three)

• Ecosystem Diversity

• Climate Diversity

• Species Diversity

• Genetic Diversity

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What are some threats to biodiversity

• Habitat Destruction

• Replanting Trees

• Invasive Species

• overpopulation

• Pollution

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What would happen if we removed one species in a rainforest ecosystem?

• Increased biodiversity

• very little change

• It would disappear

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Name 3 keystone species we talked about in class

• Beaver

• Fish

• Coral

• Wolf

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