Fig. 4

Strip and violin plot showing predicted fireline intensity of experimental managed burns on Calluna-dominated moorland in Scotland, between spring 2006 and autumn 2009, based on Equation 1 (Table 1) in relation to difficulty of control reported by land managers using basic record cards (see Additional file 1). Fireline intensity was estimated on the basis of manager-reported Beaufort wind speed and Calluna stand height. Data points are jittered on the vertical axis for clarity