Skip to main content
Fire Ecology
Fig. 2 | Fire Ecology

Fig. 2

From: Do early trends in oak barrens fire treatment predict later outcomes? Insights from three decades of vegetation monitoring

Fig. 2

Overstory trends comparing outcomes from 1989 to 2017 at the fire-treatment (GCB) and fire-free control units (FSB) of Gibbons Creek Natural Area, Pope County, Illinois, USA. (A) Trends for tree density (woody stems ≥5 cm DBH per 0.05 ha); (B) trends for tree basal area (m2 per 0.05 ha); (C) trends for shrub-sapling density (woody stems <5 cm DBH, ≥50 cm in height per 0.005 ha). Shown are the F-test results from mixed model repeat measures ANOVA using Pillai’s trace MANOVA statistic, the test for parallelism in profile analysis. Significant post hoc test results examining between-year contrast difference between GCB and FSB using the Bonferroni adjustment for trees (7 contrasts, α = 0.007) and shrub-sapling (8 contrasts, α = 0.006) strata are indicated with a line between years. Error bars are 95% confidence intervals. Significant paired comparisons between baseline and final sample period for both GCB and FSB are indicated by asterisks (*) near the right margin. Red arrows indicate times of fire treatments at GCB

Back to article page