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 |
|---|---|---|---|
| Holter | Helena National Forest | 4.2% | 33.12 |
| Area | Forest | Coverage | Hectares |
|---|---|---|---|
| Long X Divide | Dakota Prairie Grasslands | 8.5% | 346.05 |
| Collar / Bennett - Cottonwood | Dakota Prairie Grasslands | 8.0% | 636.48 |
| Lone Butte | Dakota Prairie Grasslands | 7.3% | 339.84 |
| Blacktail | Dakota Prairie Grasslands | 2.8% | 98.82 |
| Magpie | Dakota Prairie Grasslands | 2.4% | 205.02 |
| Bullion Butte | Dakota Prairie Grasslands | 1.7% | 138.15 |
| Kinley Plateau | Dakota Prairie Grasslands | 1.5% | 103.23 |
| Tracy Mountain | Dakota Prairie Grasslands | 1.2% | 48.42 |
| Area | Forest | Coverage | Hectares |
|---|---|---|---|
| Red Shirt | Buffalo Gap National Grassland | 0.7% | 48.69 |
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.