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spruce photo pair
Photo Credits: Leslie A. Viereck (1958), Leslie A. Viereck (2001)
Ecoregion: Alaska Range Mountains
Change Type: Changing treelines
Changing treelinesAnimation is available
In this remarkably matched photo pair, one can line up individual trees and see how successful they have been at reproducing! Taken off the park road along the Teklanika River, these photos capture a trend of increasing spruce across much of Denali's landscape. What physical controls do you think are loosening to allow this increase?