Ontologia

HydroBASINS lev08 watershed · #2080251180

Bassin de Nidelva

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 4 administrative regions : Gjerstad, Nissedal, Vegårshei, Åmli

21% lakePfafstetter: 25107205

Sub-basin area

264,1km²

Upstream area

2 631,1km²

Discharge

65,17m³/s

Mean elev.

346m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Nidelva578 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

5 intersecting protected areas

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

Species present

1 526 distinct species · 8 560 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 560 obs · 10 cellules
Obs. / cellule
≥ 2 918
2 918–2 917
1 019–2 917
722–1 018
< 722

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

Ecological tissue

Sample of 39 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 Nidelva : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 80 interactions GloBI sur 6 types (connectance 9.8%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
80
Connectance
0.098
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°

4,9°C

Annual rain

1 019mm

Moisture idx (CMI)

0,54

Runoff

858mm/an

PET

473mm

AET

440mm

Mean slope

7,3°

Water table

342cm

Forest

96%

Crops

0%

Urban

0%

Protected

5%

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