Invasive Species Impact and Management

The video discusses the impact of invasive species on native ecosystems, focusing on the eastern gray squirrel in the UK, lionfish in the Atlantic, and red foxes in Australia. It highlights the challenges in controlling these species and their effects on native wildlife. The video also explores historical introductions and current control efforts, emphasizing the need for awareness and action.

What is a primary reason invasive species are difficult to control?

• They are protected by international laws.

• They are often very colorful.

• They are usually very hardy and adaptable.

• They are always larger than native species.

What role does the Eastern Gray Squirrel play in its native ecosystem?

• It is a primary pollinator.

• It is a natural forest regenerator.

• It is a water purifier.

• It is a top predator.

How did the Eastern Gray Squirrel first arrive in the UK?

• Through natural migration.

• As part of a conservation effort.

• Via private collections and deliberate releases.

• Accidentally through shipping containers.

What natural predator in Scotland helps control the Eastern Gray Squirrel population?

• The European badger.

• The golden eagle.

• The pine marten.

• The red fox.

What is a significant threat posed by the lionfish in the Atlantic ecosystems?

• They cause water pollution.

• They consume large amounts of plankton.

• They destroy coral reefs.

• They are voracious predators of smaller fish.

How did lionfish likely become established in the Eastern United States?

• Through natural ocean currents.

• Via the pet trade and aquarium releases.

• Through accidental transport in cargo ships.

• By being deliberately introduced for fishing.

What was the original purpose of introducing the red fox to Australia?

• To increase biodiversity.

• To control rabbit populations.

• For traditional English fox hunting.

• As a pet for settlers.

Why is it challenging to control the red fox population in Australia?

• They are resistant to all poisons.

• They are protected by law.

• They have no natural predators.

• They are nocturnal and hard to track.

What impact have red foxes had on native Australian species?

• They have improved soil quality.

• They have helped control insect populations.

• They have caused declines and extinctions of native marsupials.

• They have increased the number of native birds.

What is a common theme in the challenges of managing invasive species?

• They are always larger than native species.

• They often have no natural predators in new environments.

• They are protected by international laws.

• They are usually very colorful.