Fig. 3

Fire history chart for the low-elevation site and the high-elevation site along the elevation gradient on the Upper Nazas watershed for the period 1575 to 2008. Date is on the x-axis, horizontal lines represent each sample, vertical black lines represent fire scars, and the gray lines show widespread fires affecting both sites. The pink band indicates a long period (50 years) with low fire occurrence, while the blue band indicates low fire variability that started 100 years ago at the high-elevation site