Ontologia

HydroBASINS lev08 watershed · #2080033860

Bassin de Tovdalsvassdraget

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 13 administrative regions : Arendal, Birkenes, Bygland, Evje og Hornnes, Froland +8

Coastal basin 54% lakePfafstetter: 25107300

Sub-basin area

2 451,9km²

Upstream area

2 451,9km²

Discharge

15,07m³/s

Mean elev.

332m

Administrative coverage

13 dept-equivalent regions (GADM L2)

5 more

30 intersecting protected areas

  • Nature Reserve

    27.71 km² overlap

  • Årdalen

    IUCN Not Reported

    Emerald Network

    20.67 km² overlap

  • Årdalen

    IUCN Ia

    Nature Reserve

    20.65 km² overlap

  • Nature Reserve

    17.45 km² overlap

  • Nature Reserve

    16.97 km² overlap

  • Raet

    IUCN Not Reported

    National Park

    7.49 km² overlap

  • Nature Reserve

    7.12 km² overlap

  • Myklandsvatna

    IUCN Not Reported

    Emerald Network

    7.12 km² overlap

  • Skråstadheia

    IUCN Not Reported

    Emerald Network

    7.11 km² overlap

21 more protected areas

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

Species present

12 660 distinct species · 661 470 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

661 470 obs · 90 cellules
Obs. / cellule
≥ 76 502
32 262–76 501
2 268–32 261
1 041–2 267
< 1 041

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 Tovdalsvassdraget : 23 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 102 interactions GloBI sur 6 types (connectance 18.2%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
102
Connectance
0.182
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°

5,3°C

Annual rain

1 256mm

Moisture idx (CMI)

0,64

Runoff

1 022mm/an

PET

447mm

AET

432mm

Mean slope

6,7°

Water table

319cm

Forest

87%

Crops

2%

Urban

1%

Protected

3%

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