Unit 5 Review - CP

What term is used for species that are at risk of extinction due to a significant decrease in their population?

• Vulnerable

• Endangered

• Critical

• Extinct

Which is NOT a main cause of extinction?

• Habitat alteration
• Unregulated hunting/fishing
• Predator control
• Natural disasters

What is a leading factor contributing to species extinction?

• Climate change

• Overhunting

• Pollution

• Loss of habitat

Which type of species has a disproportionately large effect on its environment relative to its abundance?

• Invasive

• Dominant

• Keystone

• Rare

What was the ecological impact of Robert Paine's experiment involving the removal of starfish from a marine ecosystem?

• The ecosystem remained unchanged.

• Biodiversity increased significantly.

• The mussel population was eliminated.

• The mussel population expanded rapidly.

Although things like trees, giant kelp, prairie grasses, and reef-building corals are very important to their ecosystem, they are not considered keystone species. Why?

• They do not have a big impact on their ecosystem
• Their impact on the ecosystem is proportional to their biomass
• Because they are endangered species
• There are more important species in their ecosystem

Endangered Species Act

• ONLY protects endangered species.
• Protects endangered species & their environments.
• ONLY protects environments.
• Made it illegal to hunt on federal land

Which federal agency carries out the regulations set forth by the Endangered Species Act?

• DNR
• US Forest Service (USFS)
• Bureau of Land Management (BLM
• US Fish and Wildlife Service (USFWS)

The decline of the red wolf was caused by factors such as _________________, _________________, and _________________. (select 3)

• Predator control
• Loss of habiat
• Interbreeding with coyotes
• Overhunting

• Pesticides

What are the 4 effects of keystone species?

• Control potential dominants, provide critical resources, act as mutualists, modify the environment

• Decreased competition among species, provide critical resources, act as mutualists, modify the environment

• Reduction of habitat diversity, provide critical resources, act as mutualists, modify the environment

• Increase in predator populations, control potential dominants, provide critical resources, act as mutualists,