Fig. 2
From: Frequent burning and limited stand-replacing fire supports Mexican spotted owl pair occupancy
Study area and sampling design. Black squares in the main map show the n = 200 sampling units, and the inset map shows the five call points (purple triangles) nested within each sampling unit. Grey shading shows the boundaries of National Forest System in Arizona and New Mexico in which sampling units were placed. Grey border lines in the main map delineate the Ecological Management Units, among which sampling units were stratified. Red shading shows fires > 400 ha mapped by Monitoring Trends in Burn Severity (MTBS) program since 1984. Inset shows an example of a sampling unit that was affected by fire