Ontologia

HydroBASINS lev08 watershed · #2080031490

Bassin de Dalälven

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, Sandviken, Tierp, Älvkarleby

148% lakePfafstetter: 24460011

Sub-basin area

742,9km²

Upstream area

28 435km²

Discharge

355,86m³/s

Mean elev.

49m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

  • Tjursöarkipelagen

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    18.76 km² overlap

  • Tjursöarkipelagen

    IUCN Ia

    Natura 2000 SPA

    18.76 km² overlap

  • 2014009 Tjursö-arkipelagen

    IUCN Ia

    Nature Reserve

    18.73 km² overlap

  • Marma

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    16.57 km² overlap

  • Marma

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    16.57 km² overlap

  • Marma

    IUCN Not Assigned

    Natura 2000 SCI

    16.57 km² overlap

  • Marma

    IUCN Not Assigned

    Natura 2000 SPA

    16.57 km² overlap

  • 2002531 Båtfors

    IUCN Ia

    Nature Reserve

    15.83 km² overlap

  • Båtfors

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    15.74 km² overlap

21 more protected areas

  • Båtfors

    IUCN Ia

    Natura 2000 SPA

    15.74 km² overlap

  • Båtfors

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    15.74 km² overlap

  • Båtfors

    IUCN Ia

    Natura 2000 SCI

    15.74 km² overlap

  • SK 520-2018

    IUCN IV

    Nature conservation agreement

    7.80 km² overlap

  • Untra

    IUCN IV

    Natura 2000 SPA

    4.58 km² overlap

  • Untra

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    4.58 km² overlap

  • 2002532 Bredforsen

    IUCN IV

    Nature Reserve

    3.50 km² overlap

  • Bredfors

    IUCN IV

    Natura 2000 SCI

    3.47 km² overlap

  • Bredfors

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    3.47 km² overlap

  • Hedesunda

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    2.43 km² overlap

  • Hedesunda

    IUCN IV

    Natura 2000 SPA

    2.43 km² overlap

  • 2000469 Bredforsen

    IUCN IV

    Nature Reserve

    2.22 km² overlap

  • Bredforsen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.22 km² overlap

  • Bredforsen

    IUCN IV

    Natura 2000 SCI

    2.22 km² overlap

  • 2053841 Tångsåmurarna

    IUCN Ia

    Nature Reserve

    2.03 km² overlap

  • Spjutholmen

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    1.54 km² overlap

  • Spjutholmen

    IUCN Ia

    Natura 2000 SPA

    1.54 km² overlap

  • Spjutholmen

    IUCN Ia

    Natura 2000 SCI

    1.54 km² overlap

  • Spjutholmen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.54 km² overlap

  • 2000323 Spjutholmen

    IUCN Ia

    Nature Reserve

    1.54 km² overlap

  • SK 523-2018

    IUCN IV

    Nature conservation agreement

    1.31 km² overlap

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

Species present

9 729 distinct species · 284 782 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

284 782 obs · 29 cellules
Obs. / cellule
≥ 35 333
24 956–35 332
11 757–24 955
7 921–11 756
< 7 921

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 Dalälven : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 7 types (connectance 16.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
85
Connectance
0.161
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°

5,0°C

Annual rain

603mm

Moisture idx (CMI)

0,06

Runoff

332mm/an

PET

567mm

AET

424mm

Mean slope

2,9°

Water table

116cm

Forest

80%

Crops

1%

Urban

0%

Protected

3%

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