Buffalo: /? buffalo ecosystem impact : https://www.google.com/search?q=buffalo+ecosystem+impact https://www.google.com/search?q=buffalo+ecosystem+impact Wolves

Buffalo: /? buffalo ecosystem impact : https://www.google.com/search?q=buffalo+ecosystem+impact https://www.google.com/search?q=buffalo+ecosystem+impact Wolves: /? wolves yellowstone: https://www.google.com/search?q=wolves+yellowstone https://www.google.com/search?q=wolves+yellowstone ; 120 wolves in 2024 Beavers: "Government planned it 7 years, beavers built a dam in 2 days and saved $1M" (2025) https://news.ycombinator.com/item?id=42938802#42941813 https://news.ycombinator.com/item?id=42938802#42941813 Keystone species: https://en.wikipedia.org/wiki/Keystone_species https://en.wikipedia.org/wiki/Keystone_species : > Keystone species play a critical role in maintaining the structure of an ecological community, affecting many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. Without keystone species, the ecosystem would be dramatically different or cease to exist altogether. Some keystone species, such as the wolf and lion, are also apex predators. Trophic cascade: https://en.wikipedia.org/wiki/Trophic_cascade https://en.wikipedia.org/wiki/Trophic_cascade Ecosystem service: https://en.wikipedia.org/wiki/Ecosystem_service https://en.wikipedia.org/wiki/Ecosystem_service : > Evaluations of ecosystem services may include assigning an economic value to them.