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 help ecosystemsShow moreShow less
Although invasive species have negative reputations, some invasive species are harmless and help their new habitats. The new plants and animals are an extra source of nutrients to the native habitat and its inhabitants. Helpful invasive species should stay in the habitats they currently reside in.
Pests are a universal problem. No one likes them, and they often carry diseases. Invasive species have often been introduced into habitats where pests run rampant. Because of the invasive species, the pests’ populations have successfully diminished.
Invasive species can kill pests in an ecosystem. Harlequin ladybirds were introduced to North America and Europe to control aphids. Since pests aren’t beneficial to an ecosystem, invasive species can be a great way to save an ecosystem from pests.
Pests are beneficial, and bring balance to an ecosystem. For example, cockroaches are pests, but their consumption of waste provides Nitrogen to plants to help them grow and stay healthy. Without pests, the ecosystem would be thrown in disarray.
[P1] Invasive species kill off pests.
[P2] Pests are not important enough to keep in an ecosystem.
Rejecting the premises
[Rejecting P1] Some invasive species kill off beneficial organisms too.
[Rejecting P2] Pests are beneficial to an ecosystem.