Question

Which of these is MOST LIKELY to contribute to the long-term instability of a local ecosystem? A) storms that uproot large trees in the area B) introduction of a non-native animal species C) seasonal migration of birds to and from the ecosystem D) flash floods that destroy the nests of local water birds

Answer 1

B) introduction of a non-native animal species

Answer 2

The most damaging event is B) introduction of a non-native animal species.

There are multiple cases in recorded history where invasive species have ruined ecosystems and even driven some species to extinction. An example of this is the dodo bird which went extinct due partially due to the invasion of rats into their habitats.