Fig. 3

Histograms of plant community summary variables: A percent understory cover, B richness, C Simpson’s diversity, and D evenness, from both study sites combined. Each graph has the data mean, for each variable indicated by a dashed red line. Data were collected from 2002 to 2013 in the Illilouette Creek basin in Yosemite National Park and Sugarloaf Valley in Kings Canyon National Park, California, USA, to observe naturally occurring patterns of forest and understory structure and composition in relationship to fire regime