Table 3 Plant species richness (mean ± SE) per m2 by origin, treatment type, including untreated control (Control), hand thinned, mastication only (Mast), mastication and burning (Mast + Burn), and prescribed burn only (Burn Only) and vegetation type (chaparral or oak), immediately before (pre-fire) the Carr Fire (2018) and two years after (post-fire; 2020) in Whiskeytown National Recreation Area, California, USA. Superscripted letters reflect statistically significant differences among treatment types when treatment was a significant factor in the top model. See Tables 6, 7, 8 and 9 in Appendix 3 for the model structure of each fuel category
Vegetation type | Origin | Control | Hand thinned | Mast | Mast + Burn | Burn Only |
|---|---|---|---|---|---|---|
Pre-fire (2018) | ||||||
 Chaparral | Native | 8.2 (0.7) | 11.1 (0.6) | 10.7 (0.6) | 10.5 (0.6) | 9.7 (0.6) |
Exotic | 2.9 (0.7) | 4.0 (0.3) | 2.9 (0.4) | 3.9 (0.3) | 2.7 (0.7) | |
Total | 11.1 (1.1) | 15.1 (0.7) | 13.6 (0.8) | 14.5 (0.7) | 12.3 (1.1) | |
 Oak | Native | 7.4 (0.6) | 8.1 (0.7) | 8.1 (0.9) | 7.4 (0.5) | 6.1 (0.6) |
Exotic | 1.3 (0.4) | 1.7 (0.5) | 1.8 (0.4) | 1.8 (0.4) | 0.6 (0.3) | |
Total | 8.6 (0.9)ab | 9.8 (1.1)ab | 9.9 (1.2)a | 9.2 (0.8)ab | 6.7 (0.8)b | |
Post-fire (2020) | ||||||
 Chaparral | Native | 12.2 (0.7) | 9.3 (0.8) | 10.8 (0.8) | 10.9 (0.8) | 12.1 (0.9) |
Exotic | 5.9 (0.5)a | 3.7 (0.3)c | 4.6 (0.4)abc | 4.0 (0.4)bc | 5.4 (0.4)ab | |
Total | 18.1 (1.0)a | 13.0 (0.9)b | 15.4 (1.0)ab | 14.9 (1.0)ab | 17.5 (1.0)a | |
 Oak | Native | 13.3 (0.7) | 13.4 (0.7) | 12.6 (0.6) | 12.3 (0.5) | 13.6 (0.7) |
Exotic | 6.3 (0.4)a | 5.6 (0.2)ab | 5.7 (0.3)ab | 5.0 (0.3)b | 6.2 (0.4)ab | |
Total | 19.6 (0.8) | 18.9 (0.7) | 18.2 (0.7) | 17.3 (0.6) | 19.8 (0.8) | |