Ontologia

HydroBASINS lev08 watershed · #2080031510

Bassin de Vretaån

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 : Gävle, Heby, Tierp, Uppsala, Älvkarleby

36% lakePfafstetter: 24471002

Sub-basin area

1 212,7km²

Upstream area

1 212,7km²

Discharge

13,85m³/s

Mean elev.

48m

Administrative coverage

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

  • Tämnaren väst

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    21.95 km² overlap

  • Tämnaren väst

    IUCN IV

    Natura 2000 SPA

    21.95 km² overlap

  • Tämnaren väst

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    21.95 km² overlap

  • Tämnaren väst

    IUCN IV

    Natura 2000 SCI

    21.95 km² overlap

  • Tämnaren öst

    IUCN Not Assigned

    Natura 2000 SCI

    18.38 km² overlap

  • Tämnaren öst

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    18.38 km² overlap

  • Tämnaren öst

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    18.38 km² overlap

  • Tämnaren öst

    IUCN Not Assigned

    Natura 2000 SPA

    18.38 km² overlap

  • 2001904 Aspnäs

    IUCN IV

    Nature Reserve

    12.53 km² overlap

21 more protected areas

  • SK 525-2018

    IUCN IV

    Nature conservation agreement

    4.57 km² overlap

  • Marma

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    3.20 km² overlap

  • Marma

    IUCN Not Assigned

    Natura 2000 SPA

    3.20 km² overlap

  • Marma

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    3.20 km² overlap

  • Marma

    IUCN Not Assigned

    Natura 2000 SCI

    3.20 km² overlap

  • Svinasjön

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    2.49 km² overlap

  • Svinasjön

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.49 km² overlap

  • Svinasjön

    IUCN Ia

    Natura 2000 SCI

    2.49 km² overlap

  • Svinasjön

    IUCN Ia

    Natura 2000 SPA

    2.49 km² overlap

  • 2002036 Sjömossen-Svinasjön

    IUCN Ia

    Nature Reserve

    2.49 km² overlap

  • SK 520-2018

    IUCN IV

    Nature conservation agreement

    2.06 km² overlap

  • 2053501 Odenslätt

    IUCN Ia

    Nature Reserve

    1.77 km² overlap

  • Långhällsmossen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.72 km² overlap

  • Långhällsmossen

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    1.72 km² overlap

  • Långhällsmossen

    IUCN Ia

    Natura 2000 SPA

    1.72 km² overlap

  • Långhällsmossen

    IUCN Ia

    Natura 2000 SCI

    1.72 km² overlap

  • 2001902 Långhällsmossen

    IUCN Ia

    Nature Reserve

    1.72 km² overlap

  • Marstalla

    IUCN Ia

    Natura 2000 SCI

    1.71 km² overlap

  • Marstalla

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.71 km² overlap

  • 2002923 Marstalla

    IUCN Ia

    Nature Reserve

    1.71 km² overlap

  • 2014293 Marstalla C län

    IUCN Ia

    Nature Reserve

    1.33 km² overlap

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

Species present

6 867 distinct species · 354 920 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

354 920 obs · 45 cellules
Obs. / cellule
≥ 16 849
14 518–16 848
9 099–14 517
7 440–9 098
< 7 440

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 Bassin de Vretaån : 25 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 6 types (connectance 11.4%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
89
Connectance
0.114
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°

5,2°C

Annual rain

589mm

Moisture idx (CMI)

0,04

Runoff

304mm/an

PET

566mm

AET

421mm

Mean slope

3,4°

Water table

117cm

Forest

69%

Crops

14%

Urban

1%

Protected

2%

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