Fig. 1

Distribution of the ponderosa pine (Pinus ponderosa) ecosystems in Colorado, USA, that were used in the fire regime meta-analysis of 2017, based on LANDFIRE Biophysical Settings (LANDFIRE 2008). Numbers indicate approximate location of studies used in this meta-analysis and correspond to references presented in Table 1. For studies with more than one research site in close proximity, the approximate midpoint is shown. For studies with more than one site that spanned broad distances, the two distant endpoints are indicated with the same number. The map inset depicts a close-up of the northern area where some sites were too close to display separately on the larger map