Invasive plant and animal species live in virtually all areas of the globe. The reason for their unnatural presence is because humans have accidentally or deliberately introduced them to new ecosystems. Because they have been introduced to new habitats they are not initially meant to be in, invasive species have negatively impacted their new homes. How extensive is their damage and are all invasive species harmful?
Invasive species harm native animalsShow moreShow less
Invasive species have a negative reputation for good reason. They have ruined ecosystems by eating native plants and animals. Because of their negative effects, invasive species should be relocated or eradicated.
Invasive species eat native prey and kill native predators. Without prey, predators will starve. Without natural predators, the invasive species will reproduce, and their population will grow out of control.
Invasive species disrupt a habitat’s food chain. Cane toads were used to get rid of beetles that ate sugar cane, but they killed native predators and ate plants and small mammals too. When invasive species start consuming native species, the food chain of the habitat is disrupted.
Invasive species can change the food chain for the better. The red fox was a helpful hand in thinning out wild rabbits in Australia. The rabbits were an invasive species that multiplied rapidly and became a problem. Therefore, the introduction of another invasive species worked well.
[P1] Invasive species disrupt food chains.
[P2] Native species cannot survive if the food chain is changed.
Rejecting the premises
[Rejecting P1] Invasive species can refine the food chain.
[Rejecting P2] Native species can adapt to changes.