Ecosystems Unraveled: The Keystone Effect

Can entire ecosystems be restored by bringing back the species that hold them together?

As ecosystems around the world continue to deteriorate, scientists are placing their hopes in a promising yet deceptively simple idea: the targeted reintroduction of keystone species. From European forests and coastal waters to North American prairies and wetlands, the film follows ambitious restoration projects and scientific research exploring whether these influential species can revive entire ecosystems. But does the theory hold true, or is nature far more complex, unpredictable and mysterious than we would like to admit?