Unit 5 Flashcard

Front

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

Back

Endangered

Front

Which is NOT a main cause of extinction? Habitat alteration, Unregulated hunting/fishing, Predator control, Natural disasters

Back

Natural disasters

Front

What is a leading factor contributing to species extinction?

Back

Loss of habitat

Front

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

Back

Keystone

Front

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

Back

The mussel population expanded rapidly.

Front

Why are trees, giant kelp, prairie grasses, and reef-building corals not considered keystone species?

Back

Their impact on the ecosystem is proportional to their biomass.

Front

Endangered Species Act

Back

Protects endangered species & their environments.

Front

Which federal agency carries out the regulations set forth by the Endangered Species Act? Options: DNR, US Forest Service (USFS), Bureau of Land Management (BLM), US Fish and Wildlife Service (USFWS)

Back

US Fish and Wildlife Service (USFWS)

Front

What are the 4 effects of keystone species?

Back

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