how might the reintroduction of wolves cause both direct and indirect changes in populations of so many other species within their ecosystem

The gray wolves are introduced in the Yellowstone in the Lamar valley. This gives the biologists that to unique study that the top predator is returned to the ecosystem, the food web is balanced and the ecosystem is maintained.

Explanation:

the wolves are introduced for the less the species of the elk in the habitat. It is bought in the ecosystem to manage the elk population rising. It makes the overgrazing of the park.

This affected the habitat of the many other animals and the plants in the harmful ways and the reintroduction causes the ecosystem became unbalanced and it causes the both the direct and the indirect changes to the organisms in the habitat.