Percentage of species healthy and severely damaged along nonpaved roads treated and nontreated with MgCl2-based dust suppression products in Grand and Larimer Counties, Colorado.z
| Healthy vegetation cover (%) | Severely damaged vegetation cover (%) | |||
|---|---|---|---|---|
| Nontreated roads | Treated roads | Nontreated roads | Treated roads | |
| All vegetation combined | 89.2 | 78.3*** | 4.0 | 7.6*** |
| Abies lasiocarpa | 99.2 | 87.8 | 0.8 | 4.3 |
| Acer glabrum | 79.2 | 69.5 | 19.7 | 30.3 |
| Alnus spp. | 73.9 | 75.3 | 10.5 | 19.3 |
| Artemesia tridentata | 98.1 | 98.7 | 1.1 | 1.3 |
| Chrysothamnus spp. | 68.6 | 89.1* | 0.0 | 6.3 |
| Juniperus scopulorum | 95.4 | 62.3** | 0.6 | 1.9 |
| Pinus contorta | 65.9 | 58.7* | 6.2 | 13.3** |
| Pinus flexilus | 49.8 | 58.6 | 1.1 | 17.3 |
| Picea engelmannii | 94.8 | 75.4*** | 2.5 | 3.1 |
| Pinus ponderosa | 98.0 | 69.2*** | 0.0 | 5.4*** |
| Populus angustifolia | 98.3 | 68.4 | 0.1 | 6.5 |
| Populus tremuloides | 85.0 | 74.1*** | 7.4 | 12.3** |
| Pseudotsuga menzeisii | 95.3 | 93.7 | 2.0 | 5.7 |
| Salix spp. | 80.3 | 71.9* | 7.6 | 11.8 |