that giant carnivores restore ecosystems. And, does reintroducing apex predators alter ecosystems with any predictability at all? Biologists noticed optimistic responses by other animals, from songbirds to beavers. The nightmare before christmas bedding set There’s little proof that reintroducing prime predators to ecosystems will return them to the situations that existed before they had been wiped out, in keeping with new research. Each animal has tailored for the specific stresses of their ecosystem. Lack of coyote habitat has resulted in animals venturing into suburban areas too.