provide 3 examples, with explanations, from the video of changes that occurred in yellowstone, after the wolves were reintroduced.
1. Increased vegetation growth: One of the changes that occurred in Yellowstone after the reintroduction of wolves was an increase in vegetation growth. This is because the presence of wolves reduced the populations of grazing animals such as elk and deer, which in turn allowed plants to thrive. With fewer herbivores feeding on vegetation, trees and shrubs were able to grow taller and more abundant, leading to a more diverse and healthy ecosystem.
2. Improved stream habitats: The reintroduction of wolves in Yellowstone had a cascading effect on the entire ecosystem, including the health of streams and rivers. With fewer elk and deer browsing on vegetation along stream banks, plant cover increased, which provided shade and stabilized stream banks. This resulted in cooler water temperatures, improved water quality, and enhanced habitat for fish and other aquatic species. The presence of wolves helped restore balance to the ecosystem and promote the health of stream habitats.
3. Increased biodiversity: Another significant change that occurred in Yellowstone after the wolves were reintroduced was an increase in biodiversity. By controlling the populations of elk and deer, wolves allowed other species to flourish. For example, beavers benefitted from the presence of more vegetation along streams, which they use to build dams and create habitats for themselves and other species. Additionally, the return of wolves helped regulate the populations of smaller predators such as coyotes, which in turn allowed prey species like rabbits and rodents to thrive. The reintroduction of wolves led to a more balanced and diverse ecosystem in Yellowstone.