Ontologia

HydroBASINS lev08 watershed · #2080031740

Bassin de Bällstaån

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 11 administrative regions : Botkyrka, Ekerö, Huddinge, Järfälla, Nacka +6

176% lakePfafstetter: 24472010

Sub-basin area

542,3km²

Upstream area

22 700,2km²

Discharge

169,6m³/s

Mean elev.

28m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

11 dept-equivalent regions (GADM L2)

3 more

30 intersecting protected areas

21 more protected areas

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

Species present

15 947 distinct species · 2 578 193 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 578 193 obs · 21 cellules
Obs. / cellule
≥ 468 568
187 170–468 567
143 886–187 169
77 075–143 885
< 77 075

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

Ecological tissue

Sample of 31 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 Bällstaån : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 67 interactions GloBI sur 3 types (connectance 14.4%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
67
Connectance
0.144
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°

6,8°C

Annual rain

529mm

Moisture idx (CMI)

-0,08

Runoff

191mm/an

PET

572mm

AET

412mm

Mean slope

2,5°

Water table

136cm

Forest

36%

Crops

9%

Urban

47%

Protected

14%

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