Fig. 6From: Using witness trees as pyro-indicators to depict past fire environments across the eastern United StatesComposite set of maps showing a the study areas [with Ecological Sections superimposed and Transeau’s (1935) Prairie Peninsula inset] and interpolated pyrophilic percentage maps for the b Southern Lake Michigan, c Southwestern Illinois, and d Southern Illinois study areas (Figs. 1, 3–5 in Thomas-Van Gundy et al. 2020)Back to article page