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Table 1 Two-way ANOVA results for the effects of burn treatment (burned or unburned) and year (2006 or 2019) on ln(density), species richness, Shannon diversity, and Pielou’s evenness calculated by subplot using understory data collected after burn treatments began (i.e., in 2006 and 2019) from the Yale-Myers Research and Demonstration Forest, Eastford, CT, USA. Items significant to α = .05 are in bold

From: The legacy of fire: long-term changes to the forest understory from periodic burns in a New England oak-hickory forest

Dependent variable Independent variable df F value p value
Natural log of density Burn treatment 1 8.71 0.005**
Year 1 0.54 0.465
Burn treatment x year 1 0.95 0.333
Species richness (S) Burn treatment 1 18.64 6.02e−05***
Year 1 0.67 0.416
Burn treatment x year 1 10.90 0.002**
Shannon diversity (H’) Burn treatment 1 37.97 6.59e−08***
Year 1 0.92 0.343
Burn treatment x year 1 3.09 0.084
Pielou’s evenness (J’) Burn treatment 1 23.53 9.10e−06***
Year 1 0.57 0.452
Burn treatment x year 1 0.20 0.658
  1. Significance levels: * < .05 ** < .01 *** < .001