Rivière· 18 segments
Río Saja
Crosses 1 administrative regions : Cantabria
Total length
64km
Max discharge
19,9m³/s
Max Strahler
4
Segments matched
18
River geography1 admin regions · 0 communes
1 administrative regions crossed (GADM L2)
- CantabriaCantabria · Spain58.3 kmin this dpt
12 intersecting protected areas
Valles altos del Nansa y Saja y Alto Campoo
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Valles altos del Nansa y Saja y Alto Campoo
IUCN Not AssignedNatura 2000
Saja-Besaya
IUCN VNatural Park
Sierra del Cordel y cabeceras del Nansa y del Saja
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Natura 2000
Natural Park
Marine Protected Area (OSPAR)
Espacio marino de los Islotes de Portios-Isla Conejera-Isla de Mouro
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Río Saja
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3 more protected areassorted by area
Río Saja
IUCN Not AssignedNatura 2000
La Viesca
IUCN VNatural Area of Special Interest
Pozo Tremeo
IUCN VNatural Area of Special Interest
1 page = 1 named river (aggregation of 18 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
629 distinct species · 5 168 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Río Saja : 24 espèces reliées par 79 interactions GloBI sur 5 types (connectance 13.3%, filtre Serrano α=0.2). 11 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
64km
Max discharge
19,9m³/s
Max Strahler
4
Segments matched
18
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.