The Chinook salmon is an important keystone species of the Pacific Northwest. It is a vital food source for a diversity of wildlife, including orca whales, bears, seals and large birds of prey.he health of Chinook salmon depends entirely on your location â Alaskan stocks are very healthy, while those in the Columbia River are in danger. Protection of Chinook salmon is crucial to maintain healthy Pacific Northwest ecosystems and to provide a delicious food source for years to come.