Yellowstone's Interrelationships Between Predator and Prey
Starting in the 1920s predator control programs put in place by the US government eliminated the gray wolf from Yellowstone National Park. By 1926 all wolves had been exterminated from the area. The absence of this apex predator triggered an ecological disaster known as a trophic cascade: the removal of a top predator involving changes in the populations of predator and prey through the food chain, resulting in deleterious changes in the ecosystem. Almost every species in the park was affected by the wolves' absence, from the largest of bears to the smallest of fish. In 1995, after being absent for 70 years, the gray wolf was reintroduced back into Yellowstone through the Endangered Species Act, once again restoring balance to the ecosystem.
"When one tugs at a single thing in nature, he finds it attached to the rest of the world."
Despite Yellowstone's recovery, the fate of wolves across the United States still hangs in the balance. Each year, wolves are stripped of the federal protections found in the Endangered Species Act, bringing numerous issues for the protection of the gray wolf and the Mexican gray wolf. Without action, these keystone species could once again disappear from the places that need them most.
To help with this issue 5% from each sale of the series was donated to Yellowstone Forever to further their wolf research and monitoring programs.