Table 1 Mean cover (%) of live perennial species in paired unburned and burned stands per study site. Study sites are named after the years since fire. Only the four most common species, preceded by a ‘K’ superscript, had their cover values statistically compared between paired burned (Burn) and unburned (UB) stands within each site, based on Kruskal-Wallis tests. Significantly greater cover values in one stand versus its paired burned or unburned stand are indicated by * for P values < 0.0083 (Bonferroni-corrected P < 0.05). The ‘<’ symbol represents cover values less than 0.1 %.
From: Fire Effects on Perennial Vegetation in the Western Colorado Desert, USA
| Â | 2a | 2b | 9 | 12 | 20 | 24 | 28 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Species | UB | Burn | UB | Burn | UB | Burn | UB | Burn | UB | Burn | UB | Burn | UB | Burn |
Shrubs | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Asclepias subulata a | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Acamptopappus sp.b | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
K Ambrosia dumosa | 1.8* | 0.0 | 3.9 | 0.8 | < | 0.0 | 1.9 | 0.3 | 6.3* | 0.4 | 0.9 | 1.0 | 0.4 | < |
Bebbia juncea | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
K Encelia farinosa | 0.0 | 0.1 | 0.4 | < | 0.0 | 0.0 | 2.5 | 9.8* | 1.3 | 27.1* | 1.7 | 6.6 | 0.6 | 12.6* |
Hymenoclea salsola | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 | 0.3 |
Ephedra californica c | 0.0 | 0.0 | 1.6 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | < |
K Krameria grayi | 0.0 | 0.0 | 1.5 | 0.0 | 2.1* | 0.0 | < | 0.0 | 2.9* | 0.0 | 0.7 | 0.0 | 0.7 | 0.0 |
Psorothamnus arborescens | 0.0 | 0.0 | 0.8 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 | 0.2 | 1.0 | 0.0 | 0.0 |
Thamnosma montana d | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
K Larrea tridentata | 11.0* | 0.0 | 13.1* | < | 9.0* | 0.6 | 9.0* | 0.6 | 9.0* | 0.6 | 7.1* | 0.0 | 11.1* | < |
Cacti | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Echinocereus engelmannii e | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Ferocactus cylindraceus f | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.0 |
Mammillaria tetrancistra g | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 |
Opuntia basilaris h | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 |
Opuntia bigelovi i | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 |
Opuntia echinocarpa j | 0.0 | 0.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | < | < | 0.0 | 0.5 | 0.0 |
Herbaceous perennials | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Stephanomeria pauciflora | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | < |
Croton californicus | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 0.0 | 0.0 |
Stillingia linearifolia | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Ditaxis neomexicana | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | < |
Mirabilis bigelovii | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | < | < | 0.0 | 0.0 | 0.0 | < | < |
Datura wrighti l | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | < | 0.0 | 0.0 |