Ontologia

HydroBASINS lev08 watershed · #2080236420

Bassin de Storån

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 : Knivsta, Norrtälje, Sigtuna, Uppsala, Östhammar

16% lakePfafstetter: 24472026

Sub-basin area

759,4km²

Upstream area

759,5km²

Discharge

5,95m³/s

Mean elev.

37m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Vängeån174 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

10 459 distinct species · 559 691 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

559 691 obs · 28 cellules
Obs. / cellule
≥ 75 730
45 058–75 729
23 057–45 057
15 203–23 056
< 15 203

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 Storån : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 6 types (connectance 12.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
64
Connectance
0.121
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

551mm

Moisture idx (CMI)

-0,02

Runoff

249mm/an

PET

561mm

AET

411mm

Mean slope

1,8°

Water table

141cm

Forest

65%

Crops

45%

Urban

3%

Protected

1%

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