Whitebark pine is native to the park and grows at elevations over in the drier eastern region of the park. Whitebark pine is a stabilizing species for other species of high altitude flora and provides a food source for birds such as the Clark's nutcracker and mammals including red and Douglas squirrels. Scientists believe that increasing temperatures will have a negative impact on the habitat necessary to support whitebark pine, and therefore impact a wide array of other species. White pine blister rust and mountain pine beetles have devastated whitebark pine populations in many regions; as of 2018, "28 percent of whitebark pine trees are dead, 30 percent are infected with blister rust, and 1 percent have died from mountain pine beetles."