Invasive Species and Eradication Efforts

The video discusses the complexities of eradicating invasive species, using examples like the cane toad in Australia and the eradication efforts on Macquarie Island. It highlights the challenges, costs, and potential backfires of such efforts, emphasizing the importance of preventing the introduction of non-native species.

What is the primary reason for eradicating certain species?

• To increase biodiversity

• To improve agricultural yield

• To protect endangered species

• To control invasive species

Why were cane toads originally introduced to Australia?

• To increase frog diversity

• To reduce snake populations

• To serve as a food source

• To control sugarcane beetles

What makes cane toads difficult to control in Australia?

• They reproduce very slowly

• They are resistant to all poisons

• They have no natural predators

• They are too small to catch

What is a potential natural predator of cane toads in Australia?

• Dingoes

• Kangaroos

• Meat ants

• Koalas

What unintended consequence did the introduction of the small Indian mongoose have?

• Decline in plant diversity

• Increased rodent population

• Rise in snake numbers

• Spread of rabies

What was the initial purpose of introducing cats to Macquarie Island?

• To manage rodent infestations

• To serve as pets for sailors

• To hunt native birds

• To control rabbit populations

What disease was introduced to control the rabbit population on Macquarie Island?

• Rabies

• Myxomatosis

• Plague

• Rinderpest

What was the final step in eradicating rabbits from Macquarie Island?

• Building fences

• Spreading more poison

• Using trained dogs

• Introducing more cats

What lesson can be learned from the eradication efforts on Macquarie Island?

• Introducing predators is always effective

• Eradication is quick and inexpensive

• Prevention is better than eradication

• All invasive species can be easily controlled

What is a key takeaway regarding the introduction of non-native species?

• It is a simple process

• It is a cost-effective solution

• It can lead to ecological disasters

• It always benefits the ecosystem