Ruisseau· 31 segments
Sand Hill River
Crosses 4 administrative regions : Mahnomen, Norman, Polk, Traill
Total length
256km
Max discharge
4,1m³/s
Max Strahler
3
Segments matched
31
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
9 intersecting protected areas
Easement
Big Stone County
IUCN VWaterfowl Production Area
Polk County
IUCN VIWaterfowl Production Area
Liberty
IUCN VState Wildlife Management Area
Agassiz Dunes Fee
IUCN VPrivate Conservation Land
Hovland
IUCN VState Wildlife Management Area
Hasselton
IUCN VState Wildlife Management Area
Polk County
IUCN VWaterfowl Production Area
Castor
IUCN VState Wildlife Management Area
1 page = 1 named river (aggregation of 31 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
405 distinct species · 2 016 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Sand Hill River : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 135 interactions GloBI sur 4 types (connectance 13.0%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
256km
Max discharge
4,1m³/s
Max Strahler
3
Segments matched
31
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.