Wolves and ecosystem management in Yellowstone
Wolf reintroduction restored a predator to Yellowstone in the 1990s. National Park Service research examines relationships among wolves, prey, other carnivores and vegetation.
An ecosystem contains several interacting drivers. A simple before-and-after comparison does not establish that wolves caused every vegetation or river change.
Saved on this browser. An example’s listed role does not certify that it covers every specification dimension.
Evidence and its scope
| Claim | Period and scope | Source |
|---|---|---|
| Wolves were reintroduced to Yellowstone in 1995 to restore the species and its ecological role. | 1995 reintroduction | Open source |
Possible requirement roles
- An ecosystem and its managementIdentify the ecosystem’s scale and processes.; Explain interactions and human pressures.; Do not attribute every change to a single cause.