Ontologia

Ruisseau

Vällån

Crosses 2 administrative regions : Härjedalen, Ljusdal

ruisseau

Total length

1km

Max discharge

0,4m³/s

Max Strahler

1

Segments matched

1

River geography2 admin regions · 0 communes

Parent watershed

hybas-20802062201663 km²

2 administrative regions crossed (GADM L2)

  • Härjedalen
    Jämtland · Sweden
    8.8 km
    in this dpt
  • Ljusdal
    Gävleborg · Sweden
    0.0 km
    in this dpt

6 intersecting protected areas

  • Ängraån

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Ängraån

    IUCN III

    Natura 2000 SCI

  • 2001189 Ängraån

    IUCN III

    Nature Conservation Area

  • A233452

    IUCN Not Applicable

    Voluntary set-aside areas

  • A625884

    IUCN Not Applicable

    Voluntary set-aside areas

  • A587891

    IUCN Not Applicable

    Voluntary set-aside areas

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

Species present

331 distinct species · 1 989 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 30 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 Vällån : 23 espèces reliées par 32 interactions GloBI sur 5 types (connectance 6.9%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
32
Connectance
0.069
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

1km

Max discharge

0,4m³/s

Max Strahler

1

Segments matched

1

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