Fig. 4From: Using witness trees as pyro-indicators to depict past fire environments across the eastern United StatesPyrophilic percentage maps covering a Minnesota with two forest-dominated provinces and prominent landscape features outlined, b the Superior National Forest with landtype associations, and c the Chippewa National Forest with landtype associations (Figs. 3, 13, and 19 in Thomas-Van Gundy and Nowacki 2016)Back to article page