Ontologia

Rivière· 53 segments

Namsen

Crosses 5 administrative regions : Grong, Namsos, Namsskogan, Overhalla, Røyrvik

rivière

Total length

167km

Max discharge

240,4m³/s

Max Strahler

6

Segments matched

53

River geography5 admin regions · 0 communes

Parent watershed

hybas-20801678501097 km²

5 administrative regions crossed (GADM L2)

  • Grong
    Nord-Trøndelag · Norway
    43.9 km
    in this dpt
  • Namsskogan
    Nord-Trøndelag · Norway
    43.3 km
    in this dpt
  • Overhalla
    Nord-Trøndelag · Norway
    38.0 km
    in this dpt
  • Røyrvik
    Nord-Trøndelag · Norway
    4.2 km
    in this dpt
  • Namsos
    Nord-Trøndelag · Norway
    0.0 km
    in this dpt

9 intersecting protected areas

1 page = 1 named river (aggregation of 53 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

51 distinct species · 312 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 18 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Namsen : 18 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 16 interactions GloBI sur 2 types (connectance 10.5%, filtre Serrano α=0.2).

Espèces affichées
18
Interactions affichées
16
Connectance
0.105
Patrimoniales
4
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)

Total length

167km

Max discharge

240,4m³/s

Max Strahler

6

Segments matched

53

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.