Ontologia

Ruisseau· 3 segments

Naggån

Crosses 3 administrative regions : Ljusdal, Nordanstig, Ånge

ruisseau

Total length

6km

Max discharge

1,1m³/s

Max Strahler

3

Segments matched

3

River geography3 admin regions · 0 communes

Parent watershed

hybas-20800313102259 km²

3 administrative regions crossed (GADM L2)

  • Ånge
    Västernorrland · Sweden
    9.6 km
    in this dpt
  • Ljusdal
    Gävleborg · Sweden
    4.4 km
    in this dpt
  • Nordanstig
    Gävleborg · Sweden
    2.4 km
    in this dpt

5 intersecting protected areas

  • Hagåsen

    IUCN Not Assigned

    Natura 2000 SCI

  • Hagåsen

    IUCN Not Assigned

    Natura 2000 SPA

  • Hagåsen

    IUCN Not Reported

    Special Protection Area (Birds Directive)

  • Hagåsen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • 2000703 Hagåsen

    IUCN Ia

    Nature Reserve

1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

422 distinct species · 4 065 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 36 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 Naggån : 30 espèces reliées par 35 interactions GloBI sur 6 types (connectance 5.3%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
35
Connectance
0.053
Patrimoniales
0
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

6km

Max discharge

1,1m³/s

Max Strahler

3

Segments matched

3

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