Table 3 Variogram model parameters for pre-burn fuel components, mean fire temperature, and post-burn fuel components (burn-only plot) of plots burned in the spring of 2002 or 2003 in a longleaf pine forest in the southeastern USA.
Effective | Relative | Sample | ||||||
|---|---|---|---|---|---|---|---|---|
Range | structure | Model fit | Nugget | Sill | variance | |||
model | (m) | C/(C + Co) | r2 | Co | C + Co | s2 | ||
Burn-only | ||||||||
Plot 6 | ||||||||
Mean fire temperature | exp. | 27 | 0.95 | 0.95 | 0.05 | 0.89 | 5733 | |
Pre-burn standing biomass | exp. | 10 | 0.99 | 0.96 | 0.00 | 1.06 | 3430 | |
Pre-burn litter mass | exp. | * | 0.50 | 0.01 | 0.70 | 1.39 | 914718 | |
Pre-burn 1–1000 hour fuel mass | spher. | 131 | 0.65 | 0.99 | 0.44 | 1.25 | 662855 | |
post-burn standing biomass | exp. | 494 | 0.50 | 0.51 | 0.74 | 1.48 | 3089 | |
post-burn litter mass | exp. | 51 | 0.97 | 0.97 | 0.03 | 0.99 | 185987 | |
post-burn 1–1000 hour fuel mass | exp. | 511 | 0.50 | 0.06 | 0.89 | 1.77 | 404285 | |
Herbicide-and-burn | ||||||||
Plot 4 | ||||||||
mean fire temperature | exp. | 157 | 0.61 | 0.80 | 0.44 | 1.13 | 6002 | |
Pre-burn standing biomass | exp. | * | 0.50 | 0.03 | 0.90 | 1.80 | 5196 | |
Pre-burn litter mass | spher. | 21 | 0.99 | 0.95 | 0.00 | 1.14 | 403636 | |
Pre-burn 1–1000 hour fuel mass | spher. | 21 | 0.94 | 0.89 | 0.07 | 1.12 | 112489 | |
Plot 7 | ||||||||
mean fire temperature | exp. | 50 | 0.65 | 0.93 | 0.35 | 1.00 | 3831 | |
Pre-burn standing biomass | spher. | 20 | 0.80 | 0.99 | 0.20 | 1.03 | 16.65 | |
Pre-burn litter mass | exp. | 48 | 0.89 | 0.99 | 0.11 | 1.01 | 164076 | |
Pre-burn 1–1000 hour fuel mass | exp. | * | 0.50 | 0.01 | 0.90 | 0.18 | 57121 | |
Plot 12 | ||||||||
mean fire temperature | exp. | 137 | 0.99 | 0.98 | 0.02 | 1.28 | 44879 | |
Pre-burn standing biomass | exp. | 56 | 0.96 | 0.94 | 0.04 | 1.06 | 8450 | |
Pre-burn litter mass | exp. | * | 0.50 | 0.70 | 0.66 | 1.31 | 238176 | |
Pre-burn 1–1000 hour fuel mass | linear | # | 0.00 | 0.24 | 1.34 | 1.34 | 145911 | |
* effective range beyond the range of study plot | ||||||||
# no spatial structure detected (C/(C+ Co) = 0) | ||||||||