Ontologia

HydroBASINS lev08 watershed · #2080253060

Bassin de Byälven

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 5 administrative regions : Grums, Lidköping, Mellerud, Säffle, Åmål

454% lakePfafstetter: 24480401

Sub-basin area

554,8km²

Upstream area

4 997,4km²

Discharge

49,64m³/s

Mean elev.

68m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Hognerudsälven944 km²

▲ Receives from 2 basins

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

  • SK 1125-2003

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.08 km² overlap

  • SK 82-2017

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.08 km² overlap

  • SK 923-2005

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.07 km² overlap

  • SK 878-2004

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.07 km² overlap

  • SK 201-2018

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.05 km² overlap

  • SK 90-2002

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.05 km² overlap

  • SK 269-2015

    IUCN Ia

    Habitat Protection Area

    0.04 km² overlap

  • SK 14-2022

    IUCN Ia

    Habitat Protection Area

    0.04 km² overlap

  • SK 705-2006

    IUCN Ia

    Habitat Protection Area

    0.04 km² overlap

  • SK 664-2007

    IUCN Ia

    Habitat Protection Area

    0.04 km² overlap

  • SK 478-2018

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 877-2004

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.03 km² overlap

  • SK 120-1999

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.03 km² overlap

  • SK 763-2006

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 157-2004

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 951-2005

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 160-2004

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 747-2006

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 40-2014

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.03 km² overlap

  • SK 317-2006

    IUCN Ia

    Habitat Protection Area

    0.03 km² overlap

  • SK 1119-2003

    IUCN IV

    Nature conservation agreement, Swedish Forest Agency

    0.03 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

2 979 distinct species · 50 642 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

50 642 obs · 18 cellules
Obs. / cellule
≥ 9 254
7 445–9 253
4 274–7 444
1 736–4 273
< 1 736

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 39 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 Bassin de Byälven : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 101 interactions GloBI sur 5 types (connectance 13.6%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
101
Connectance
0.136
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

6,0°C

Annual rain

680mm

Moisture idx (CMI)

0,16

Runoff

309mm/an

PET

574mm

AET

448mm

Mean slope

1,5°

Water table

146cm

Forest

42%

Crops

3%

Urban

1%

Protected

1%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)