Ontologia

HydroBASINS lev08 watershed · #2080036460

Bassin de Helgåa

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 7 administrative regions across 2 countries : Inderøy, Levanger, Meråker, Snåsa, Steinkjer +2

34% lakePfafstetter: 25107960

Sub-basin area

1 584,5km²

Upstream area

1 584,7km²

Discharge

51,69m³/s

Mean elev.

414m

Administrative coverage

7 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

4 785 distinct species · 184 616 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

184 616 obs · 68 cellules
Obs. / cellule
≥ 46 344
6 625–46 343
1 486–6 624
671–1 485
< 671

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 Helgåa : 25 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 3 types (connectance 12.9%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
77
Connectance
0.129
Patrimoniales
3
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°

2,6°C

Annual rain

1 025mm

Moisture idx (CMI)

0,57

Runoff

985mm/an

PET

442mm

AET

410mm

Mean slope

8,0°

Water table

275cm

Forest

51%

Crops

0%

Urban

0%

Protected

20%

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