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Table 4 Fire return interval analyses by study site and by region (all three sites combined) in Pinus roxburghii forest of Uttarakhand, India, 2017. Study site codes are shown in Table 1. All composite analyses are based on a minimum of two samples and two fire scars

From: Frequent burning in chir pine forests, Uttarakhand, India

Parameters BAD PAN SUN Region
Composite
 Total number of intervals 19 12 14 38
 Mean fire interval (yr) 4.16 4.42 5.29 2.18
 Median fire interval (yr) 2 3 3.5 2
 Standard deviation (yr) 3.69 3.48 5.85 1.84
 Frequency (fires yr−1) 0.24 0.23 0.19 0.46
 Coefficient of variation 0.89 0.79 1.11 0.84
 Skewness 1.79 1.67 2.88 2.69
 Kurtosis 3.13 2.42 9.11 8.81
 Minimum fire interval (yr) 1 1 1 1
 Maximum fire interval (yr) 15 13 24 10
 Weibull mean (yr) 4.2 4.46 5.34 2.21
 Weibull median (yr) 3.43 3.84 4.12 1.88
Individual-sample
 Point mean fire interval (yr) 6.07 8.33 6.76 6.95