Ontologia

Ruisseau· 9 segments

Halån

Crosses 5 administrative regions : Krokom, Ragunda, Sollefteå, Strömsund, Östersund

ruisseau

Total length

49km

Max discharge

2,7m³/s

Max Strahler

2

Segments matched

9

River geography5 admin regions · 0 communes

Parent watershed

hybas-20801860502734 km²

5 administrative regions crossed (GADM L2)

  • Ragunda
    Jämtland · Sweden
    22.5 km
    in this dpt
  • Strömsund
    Jämtland · Sweden
    8.6 km
    in this dpt
  • Östersund
    Jämtland · Sweden
    7.1 km
    in this dpt
  • Krokom
    Jämtland · Sweden
    3.0 km
    in this dpt
  • Sollefteå
    Västernorrland · Sweden
    0.0 km
    in this dpt

25 intersecting protected areas

16 more protected areas

1 page = 1 named river (aggregation of 9 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

368 distinct species · 2 850 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 28 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 Halån : 23 espèces reliées par 27 interactions GloBI sur 4 types (connectance 6.7%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
27
Connectance
0.067
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

49km

Max discharge

2,7m³/s

Max Strahler

2

Segments matched

9

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