The graphs above represent the species and behaviors in the wolf ecosystem in Yellowstone National Park. Three tree species (aspen, cottonwood, and willow) are included so you can identify patterns and cause and effect relationships with other species. Use the graphs to answer the questions below. Question A: What do we call species like wolves who have impact on so many other species, whether the effects are direct or indirect?
Question B: How do the data points from 2005 specifically illustrate the relationship between elk and wolves? Explain using data.
Question C: Which of the (3) prey species included in the graphs is the wolves’ preferred prey? Cite evidence from the graphs to support this claim.