Ontologia

HydroBASINS lev08 watershed · #2080033190

Bassin de Viskan

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 9 administrative regions : Bollebygd, Borås, Falkenberg, Herrljunga, Kungsbacka +4

54% lakePfafstetter: 24479060

Sub-basin area

2 177km²

Upstream area

2 177,3km²

Discharge

39,75m³/s

Mean elev.

149m

Administrative coverage

9 dept-equivalent regions (GADM L2)

1 more

30 intersecting protected areas

21 more protected areas

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

Species present

12 404 distinct species · 1 255 113 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 255 113 obs · 78 cellules
Obs. / cellule
≥ 163 175
31 660–163 174
13 191–31 659
9 291–13 190
< 9 291

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

Ecological tissue

Sample of 33 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 Viskan : 22 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 4 types (connectance 16.1%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
85
Connectance
0.161
Patrimoniales
2
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°

6,5°C

Annual rain

895mm

Moisture idx (CMI)

0,37

Runoff

552mm/an

PET

565mm

AET

478mm

Mean slope

3,2°

Water table

267cm

Forest

85%

Crops

10%

Urban

2%

Protected

1%

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