Ontologia

Rivière· 4 segments

Håvaån

Crosses 3 administrative regions : Ljusdal, Ovanåker, Rättvik

rivière

Total length

18km

Max discharge

7,6m³/s

Max Strahler

4

Segments matched

4

River geography3 admin regions · 0 communes

Parent watershed

hybas-2080211060386 km²

3 administrative regions crossed (GADM L2)

  • Ljusdal
    Gävleborg · Sweden
    20.6 km
    in this dpt
  • Rättvik
    Dalarna · Sweden
    11.0 km
    in this dpt
  • Ovanåker
    Gävleborg · Sweden
    0.6 km
    in this dpt

9 intersecting protected areas

  • Ejheden

    IUCN IV

    Nature conservation agreement

  • Ejheden

    IUCN IV

    Nature conservation agreement

  • Voxnan

    IUCN III

    Natura 2000 SCI

  • Voxnan

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • 2000943 Voxnan

    IUCN III

    Nature Conservation Area

  • A230430

    IUCN Not Applicable

    Voluntary set-aside areas

  • A220167

    IUCN Not Applicable

    Voluntary set-aside areas

  • A550389

    IUCN Not Applicable

    Voluntary set-aside areas

  • A118418

    IUCN Not Applicable

    Voluntary set-aside areas

1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

526 distinct species · 2 400 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 Håvaån : 25 espèces reliées par 58 interactions GloBI sur 4 types (connectance 12.5%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
58
Connectance
0.125
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

18km

Max discharge

7,6m³/s

Max Strahler

4

Segments matched

4

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