Ontologia

HydroLAKES lake · #157813

Ullnasjön

Natural lakeSwedenEurope 13 m

Surface area

2,94km²

Avg depth

6,5m

Volume

19,15km³

Shoreline

8,2km

Administrative coverage

Parent watershed

hybas-2080031730322 km² · upstream 322 km²

3 dept-equivalent regions (GADM L2)

  • Österåker
    Stockholm · Sweden
    1.25 km²
    42.3% of lake
  • Vallentuna
    Stockholm · Sweden
    1.03 km²
    34.8% of lake
  • Täby
    Stockholm · Sweden
    0.68 km²
    22.9% of lake

2 intersecting protected areas

  • Deglinge

    IUCN Not Assigned

    Natura 2000 SCI

    0.01 km² overlap

  • Deglinge

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.01 km² overlap

Computed live · HydroLAKES × GADM × WDPA · cached after first hit.

Species present

3 281 distinct species · 60 035 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

60 035 obs · 1 cellules
Obs. / cellule
≥ 60 035
60 035–60 034
60 035–60 034
60 035–60 034
< 60 035

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

Ecological tissue

Sample of 35 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 Ullnasjön : 25 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
85
Connectance
0.121
Patrimoniales
3
Plus dense que (national)0 %(top 100%)

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

Lake statistics (HydroLAKES)

Surface

2,94km²

Avg depth

6,5m

Volume

19,150km³

Watershed

26km²

Shoreline

8,2km

Shore dev. idx

1,35

Residence time

1 198days

Elevation

13m

HydroLAKES v1.0 (Messager et al. 2016) · 1.4M lacs ≥ 0.1 km² mondialement.