Question 1 Grey wolves are a carnivorous species (meaning they eat only other animals, many of which are plant-eating herbivores). They were recently re-introduced to Yellowstone National Park, where their population has grown. Yellowstone National Park is made up of an active volcano, which last erupted 70,000 years ago. Describe how the grey wolf population would be impacted if a volcanic eruption occurred that spewed a dense ash cloud, which then blocked sunlight in a section of Yellowstone National Park..