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
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 |