Ontologia

Rivière· 126 segments

Ljusnan

Crosses 7 administrative regions : Berg, Bollnäs, Härjedalen, Ljusdal, Røros +2

rivière

Total length

501km

Max discharge

167,4m³/s

Max Strahler

6

Segments matched

126

River geography7 admin regions · 0 communes

Parent watershed

hybas-20802062201663 km²

7 administrative regions crossed (GADM L2)

  • Härjedalen
    Jämtland · Sweden
    268.4 km
    in this dpt
  • Ljusdal
    Gävleborg · Sweden
    145.6 km
    in this dpt
  • Bollnäs
    Gävleborg · Sweden
    97.2 km
    in this dpt
  • Söderhamn
    Gävleborg · Sweden
    45.3 km
    in this dpt
  • Berg
    Jämtland · Sweden
    1.8 km
    in this dpt
  • Røros
    Sør-Trøndelag · Norway
    0.0 km
    in this dpt
  • Tydal
    Sør-Trøndelag · Norway
    0.0 km
    in this dpt

30 intersecting protected areas

21 more protected areas

1 page = 1 named river (aggregation of 126 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

386 distinct species · 1 196 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 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 Ljusnan : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 55 interactions GloBI sur 7 types (connectance 7.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
55
Connectance
0.070
Patrimoniales
1
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

501km

Max discharge

167,4m³/s

Max Strahler

6

Segments matched

126

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