Ontologia

HydroBASINS lev08 watershed · #2080036910

Bassin de Valelva

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 : Alstahaug, Vefsn, Vevelstad

66% lakePfafstetter: 25109108

Sub-basin area

261,8km²

Upstream area

261,8km²

Discharge

19,2m³/s

Mean elev.

457m

Administrative coverage

3 dept-equivalent regions (GADM L2)

2 intersecting protected areas

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

Species present

366 distinct species · 1 217 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 217 obs · 12 cellules
Obs. / cellule
≥ 272
227–271
174–226
80–173
< 80

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 Valelva : 29 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 56 interactions GloBI sur 3 types (connectance 6.8%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
56
Connectance
0.068
Patrimoniales
4
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°

3,0°C

Annual rain

2 083mm

Moisture idx (CMI)

0,82

Runoff

1 843mm/an

PET

382mm

AET

382mm

Mean slope

12,9°

Water table

412cm

Forest

19%

Crops

0%

Urban

0%

Protected

29%

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