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Table 6 Comparison of herbaceous and shrub species richness and diversity between burned (n = 60) and unburned (n = 60) plots in Big Basin Redwoods State Park, Boulder Creek, California, USA. Data were collected in 2019 to determine the influence of burns conducted between 1999 and 2011 on vegetation, forest structure, and fuel load

From: Fuel load, stand structure, and understory species composition following prescribed fire in an old-growth coast redwood (Sequoia sempervirens) forest

Variable Mean (SE) Nested ANOVA results
Unburned Burned F P df
Understory richness (species per plot) 1.8 (0.2) 2.1 (0.2) 0.37 0.55 1
Understory percent cover (per plot) 2.9 (0.7) 7.3 (1.9) 4.00 0.050 1
Shrub richness (species per plot) 1.2 (0.1) 0.7 (0.1) 22.85 <0.0010 1
Shrub percent cover (per plot) 9.6 (2.0) 1.6 (0.5) 9.81 0.0022 1