|
| U.S. Endangered Species Act (1) | U.S. fire management (1) | unburned islands (1) |
| uncertainty (5) | uncontrolled burning (1) | understory (1) |
| understory composition (1) | understory plant communities (2) | understory response (1) |
| Understory vegetation (3) | United States (1) | unmanned aerial vehicles (1) |
| unnecessary exposure (1) | unprotected lands (1) | unsupervised machine learning (1) |
| untrammeled (1) | uppression (1) | urbanisation (1) |
| urbanization (1) | US Forest Service (2) | US Northern Rocky Mountains (1) |
| US Pacific Northwest (1) | USA (1) | USDA Forest Service (1) |
| USFS (1) | | |
