What happens when non-native species are introduced?
Native species are threatened when non-native species are introduced into an ecosystem. Non-native species can often take over an area, choking out the native species — especially if introduced someplace where they have no natural predators. This goes for mammals, fish, insects and plants. An invasive species that colonizes a new area may gain an ecological edge since the insects, diseases, and foraging animals that naturally keep its growth in check in its native range are not present in its new habitat.
