Table 4 Statistics of fire interval distributions for Ciénega de la Vaca, Durango, Mexico, from 1739 to 1982. Statistical analysis was carried out in three categories: (1) all fire years, including those represented by a single fire scar; (2) fire years in which 10% or more of the recording sample trees were scarred; and (3) fire years in which 25% or more of the recording sample trees were scarred. MFI mean fire interval, Min minimum fire interval, Max maximum fire interval, WMPI Weibull median probability interval
From: Climatic influence on fire regime (1700 to 2008) in the Nazas watershed, Durango, Mexico
Site and analysis period | Category of analysis | Intervals | MFI (yr) | Min (yr) | Max (yr) | Average per-sample fire interval (yr) | WMPI |
|---|---|---|---|---|---|---|---|
Low elevation site 1739 to 1982 | All scars | 77 | 3.16 | 1 | 16 | 16.9 | 2.69 |
10% scarred | 56 | 4.34 | 1 | 20 | 3.73 | ||
25% scarred | 28 | 8.68 | 1 | 31 | 7.22 | ||
Low elevation site 1739 to 1954 | All scars | 73 | 2.95 | 1 | 12 | 16.4 | 2.59 |
10% scarred | 53 | 4.00 | 1 | 12 | 3.60 | ||
25% scarred | 27 | 7.85 | 1 | 22 | 6.80 | ||
High elevation site 1739 to 1954 | All scars | 76 | 2.63 | 1 | 7 | 13.0 | 2.45 |
10% scarred | 60 | 3.33 | 1 | 9 | 3.14 | ||
25% scarred | 32 | 6.25 | 1 | 19 | 5.44 | ||
Combined 1739 to 1982 | All scars | 107 | 2.27 | 1 | 8 | 15.6 | 2.04 |
10% scarred | 62 | 3.92 | 1 | 20 | 3.44 | ||
25% scarred | 30 | 8.10 | 2 | 31 | 6.97 | ||
Combined 1739 to 1954 | All scars | 102 | 2.11 | 1 | 7 | 15.3 | 1.94 |
10% scarred | 59 | 3.64 | 1 | 12 | 3.37 | ||
25% scarred | 29 | 7.31 | 2 | 22 | 6.61 |