Ontologia

Rivière· 3 segments

Tvärbäcken

Crosses 1 administrative regions : Nordmaling

rivière

Total length

36km

Max discharge

30,1m³/s

Max Strahler

4

Segments matched

3

River geography1 admin regions · 0 communes

Parent watershed

hybas-20800307102572 km²

1 administrative regions crossed (GADM L2)

  • Nordmaling
    Västerbotten · Sweden
    5.9 km
    in this dpt

8 intersecting protected areas

  • Öreälven

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Öreälven

    IUCN Not Assigned

    Natura 2000 SCI

  • 2001675 Hummelholm

    IUCN IV

    Nature Reserve

  • Hummelholm

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Hummelholm

    IUCN IV

    Natura 2000 SCI

  • SK 328-2015

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

  • SK 48-2011

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

  • SK 39-2000

    IUCN Ia

    Habitat Protection Area

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

Species present

817 distinct species · 2 403 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 34 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 Tvärbäcken : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 97 interactions GloBI sur 6 types (connectance 15.4%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
97
Connectance
0.154
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

36km

Max discharge

30,1m³/s

Max Strahler

4

Segments matched

3

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