Ontologia

HydroBASINS lev08 watershed · #2080036720

Bassin de Dunaelva

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 3 administrative regions : Fosnes, Namsos, Overhalla

Coastal basin 17% lakePfafstetter: 25109101

Sub-basin area

528,3km²

Upstream area

528,3km²

Discharge

24,44m³/s

Mean elev.

139m

Administrative coverage

3 dept-equivalent regions (GADM L2)

6 intersecting protected areas

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

Species present

2 301 distinct species · 16 057 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

16 057 obs · 22 cellules
Obs. / cellule
≥ 4 178
1 880–4 177
632–1 879
449–631
< 449

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

Ecological tissue

Sample of 41 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 Dunaelva : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 71 interactions GloBI sur 6 types (connectance 8.7%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
71
Connectance
0.087
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°

4,6°C

Annual rain

1 455mm

Moisture idx (CMI)

0,70

Runoff

1 460mm/an

PET

436mm

AET

425mm

Mean slope

10,9°

Water table

318cm

Forest

76%

Crops

0%

Urban

1%

Protected

8%

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