Inventoried Roadless Areas where this ecosystem is present, identified from LANDFIRE 2024 Existing Vegetation Type spatial analysis. Coverage indicates the proportion of each area occupied by this ecosystem type.
| Area | Forest | Coverage | Hectares |
|---|---|---|---|
| Magpie | Dakota Prairie Grasslands | 4.6% | 398.25 |
| Easy Hill | Dakota Prairie Grasslands | 4.1% | 122.22 |
| Wannagan | Dakota Prairie Grasslands | 3.8% | 93.15 |
| Scairt Woman | Dakota Prairie Grasslands | 3.8% | 92.7 |
| John Town / Horse Creek | Dakota Prairie Grasslands | 3.4% | 342.27 |
| Bell Lake | Dakota Prairie Grasslands | 2.9% | 134.28 |
| Twin Buttes | Dakota Prairie Grasslands | 2.9% | 155.79 |
| Tracy Mountain | Dakota Prairie Grasslands | 2.3% | 90.09 |
| Strom - Hanson | Dakota Prairie Grasslands | 2.2% | 172.53 |
| Dawsons Waterhole | Dakota Prairie Grasslands | 1.9% | 47.16 |
| Collar / Bennett - Cottonwood | Dakota Prairie Grasslands | 1.9% | 152.37 |
| Ponderosa Pine | Dakota Prairie Grasslands | 1.9% | 57.24 |
| Kinley Plateau | Dakota Prairie Grasslands | 1.5% | 104.31 |
| Lone Butte | Dakota Prairie Grasslands | 1.4% | 63.9 |
| Blacktail | Dakota Prairie Grasslands | 1.4% | 47.43 |
| Bullion Butte | Dakota Prairie Grasslands | 1.0% | 81.09 |
| Long X Divide | Dakota Prairie Grasslands | 0.8% | 32.94 |
| Area | Forest | Coverage | Hectares |
|---|---|---|---|
| South Fork | Dakota Prairie Grasslands | 2.3% | 70.65 |
| First Black Canyon | Buffalo Gap National Grassland | 2.0% | 39.69 |
| Cheyenne River | Buffalo Gap National Grassland | 1.8% | 55.53 |
| Red Shirt | Buffalo Gap National Grassland | 1.7% | 113.85 |
| Jim Wilson Canyon | Buffalo Gap National Grassland | 1.2% | 30.06 |
| Twin Butte Creek | Dakota Prairie Grasslands | 1.0% | 26.1 |
| Indian Creek | Buffalo Gap National Grassland | 0.8% | 79.47 |
| Area | Forest | Coverage | Hectares |
|---|---|---|---|
| Duck Creek | Thunder Basin National Grassland | 2.1% | 105.03 |
Ecosystem classification: Ecosystems are classified using the LANDFIRE 2024 Existing Vegetation Type (EVT) layer, mapped to NatureServe Terrestrial Ecological Systems via a curated crosswalk. Each EVT is linked to the USNVC (U.S. National Vegetation Classification) hierarchy through pixel-level co-occurrence analysis of LANDFIRE EVT and NatureServe IVC Group rasters across all roadless areas.
Vegetation coverage: Coverage percentages and hectares are derived from zonal statistics of the LANDFIRE 2024 EVT raster intersected with roadless area boundaries.
Ecosystem narratives and community species: Sourced from the NatureServe Explorer API, representing professional ecological assessments of vegetation composition, environmental setting, dynamics, threats, and characteristic species assemblages.
IVC hierarchy: The International Vegetation Classification hierarchy is sourced from the USNVC v3.0 Catalog, providing the full classification from Biome through Association levels.
Component associations: Plant community associations listed as components of each NatureServe Ecological System. Association data from the NatureServe Explorer API.
State ranks: Conservation status ranks assigned by NatureServe member programs in each state where the ecosystem occurs.