Ontologia

Rivière· 24 segments

L'Arc

Crosses 1 administrative regions : Savoie

rivière

Total length

213km

Max discharge

27,6m³/s

Max Strahler

4

Segments matched

24

River geography1 admin regions · 46 communes

Parent watershed

hybas-20805397701980 km²

1 administrative regions crossed (GADM L2)

  • Savoie
    Auvergne-Rhône-Alpes · France
    71.0 km
    in this dpt
46 communes (L5)

15 intersecting protected areas

6 more protected areas

1 page = 1 named river (aggregation of 24 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

1 065 distinct species · 10 552 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 14 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 L'Arc : 11 espèces reliées par 17 interactions GloBI sur 2 types (connectance 18.7%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
14
Interactions affichées
17
Connectance
0.187
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)

Total length

213km

Max discharge

27,6m³/s

Max Strahler

4

Segments matched

24

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.