Table 3 Generalized linear mixed model predicting first-year survival of resprouting plants (n =3 22) following 13 prescribed fires, from 2006 to 2010, at Archbold Biological Station, Venus, Florida, USA, where the effect of prescribed fire on resprouting Florida vegetation was examined. Plants within transects were not independent so transect was evaluated as a random effect (variance < 0.001) in the model. Variables included maximum fire temperature, residence time in seconds (log), burn season, habitat, and species groups. Reference categories for burn season were “Fire,” “Scrubby Flatwoods” for habitat, and “Oaks” for species groups. For each variable, the estimated coefficient (β ± standard error [SE]) shows the relationship and magnitude of change with the probability of survival. Sample size (n) and mean first-year survival is provided for each group. Marginal predictors are in italics (P < 0.1). The random effects of transect were also highly significant (P < 0.001)
From: Are fire temperatures and residence times good predictors of survival and regrowth for resprouters in Florida, USA, scrub?
Fixed effects | β (SE) | P-value | R2 | n | First-year survival (%) |
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Intercept | 2.92 (1.848) | 0.114 | 0.039 | | 91.0 |
Maximum temperature | <0.01 (0.001) | 0.757 | <0.001 | 322 | |
Residence time (log) | −0.26 (0.744) | 0.727 | 0.001 | 322 | |
Burn season | Fire | | | | 167 | 89.2 |
Wet | 0.63 (0.634) | 0.323 | <0.001 | 85 | 94.1 |
Dry | 0.93 (0.736) | 0.204 | 0.001 | 70 | 91.4 |
Habitat | Scrubby flatwoods | | | | 143 | 93.7 |
Sandhill | 0.39 (0.678) | 0.565 | <0.001 | 72 | 94.4 |
Sand pine–oak scrub | −1.13 (0.673) | 0.094 | 0.004 | 36 | 83.3 |
Flatwoods | −0.84 (0.559) | 0.131 | 0.004 | 71 | 85.9 |
Species group | Oaks | | | | 97 | 93.8 |
Palms | 1.11 (1.101) | 0.313 | 0.007 | 48 | 97.9 |
Ericads | −0.32 (0.653) | 0.620 | 0.001 | 70 | 91.4 |
Graminoids | −0.65 (0.723) | 0.368 | 0.002 | 32 | 87.5 |
Shrubs | −0.92 (0.564) | 0.101 | 0.008 | 75 | 84.0 |