Ecological Impacts of Species Reintroduction

The video explores the significant impact of wolves on Yellowstone National Park's ecosystem, highlighting their role in restoring ecological balance and boosting tourism. It also discusses the successful reintroduction of bald eagles to the Channel Islands, which helped restore the local ecosystem. The video emphasizes the importance of conservation efforts in reviving endangered species and ecosystems.

What was one of the main reasons for the decline of wolf populations in the 1800s?

• Lack of food

• Human expansion and hunting

• Disease outbreaks

• Natural disasters

What was a significant consequence of the absence of wolves in Yellowstone?

• Overpopulation of elk

• Increase in river depth

• Decrease in elk population

• Stabilization of riverbanks

How did the reintroduction of wolves affect the behavior of elk in Yellowstone?

• Elk became more aggressive

• Elk population increased further

• Elk started avoiding certain areas

• Elk began to migrate out of the park

What was one of the ecological benefits observed after the reintroduction of wolves?

• Decrease in bird populations

• Decline in beaver colonies

• Reduction in fish diversity

• Regeneration of riverbank vegetation

What economic impact did the reintroduction of wolves have on Yellowstone?

• Increased costs with no benefits

• No change in economic status

• Increased tourism revenue

• Decreased tourism revenue

Besides wolves, what other factors contributed to the recovery of Yellowstone's ecosystem?

• Introduction of new predators

• Decrease in tourism

• Introduction of new plant species

• Drought and increased human hunting

What was the primary reason for the decline of bald eagles on the Channel Islands?

• Overhunting

• Habitat destruction

• Exposure to DDT

• Competition with other birds

What invasive species had to be removed to help restore the Channel Islands ecosystem?

• Feral cats

• Feral pigs

• Wild goats

• Invasive plants

How did the reintroduction of bald eagles affect the golden eagles on the Channel Islands?

• Golden eagles began to prey on fish

• Golden eagles increased in number

• Golden eagles were chased off the islands

• Golden eagles formed alliances with bald eagles

What was the outcome for the Channel Island foxes after the ecosystem restoration efforts?

• They migrated to other islands

• They became extinct

• Their population decreased

• Their population increased significantly