Fig. 7
Variability in the ratio of earlywood to latewood fire scars by three latitude groups (n = 12 for each group) from seven fire history studies on ponderosa pine (Pinus ponderosa) ecosystems in Colorado, USA, that were used in the fire regime meta-analysis of 2017. Latitude groups (low, mid, and high) are defined by equal breaks (1.2° per group) in the range of latitude values for all 39 sites (minimum = 37.13°, maximum = 40.73°). The horizontal line in the middle of each box represents the median value (50th percentile), the ends of the boxes are the first (Q1) and third (Q3) quartiles, which cover the central 50% of the data, and the difference between Q3 and Q1 is the interquartile range (IQR). Vertical lines extend to the most extreme data points that are no more than ±1.5 × IQR, and outliers beyond the lines are individually displayed as dots