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Fire Ecology
Fig. 3 | Fire Ecology

Fig. 3

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

Fig. 3

Trends for ground-layer parameters comparing outcomes from 1989 to 2017 at the fire-treatment (GCB) and fire-free control (FSB) units of Gibbons Creek Natural Area, Pope County, Illinois, USA. (A) Trends for species density (species number per 0.25 m2); (B) trends for species richness (sum from 12 0.25 m2 quadrats per 0.05 ha plot); (C) trends for species diversity (Shannon-Weiner index [Hˈ] per 0.25 m2); (D) trends for species dominance (Simpson’s index [C] per 0.25 m2); (E) trends for percent cover (per 0.25 m2). 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 (8 contrasts, α = 0.006) 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

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