Ontologia

Ruisseau· 20 segments

L'Arc

Crosses 2 administrative regions : Bouches-du-Rhône, Var

ruisseau

Total length

213km

Max discharge

8,6m³/s

Max Strahler

3

Segments matched

20

River geography2 admin regions · 18 communes

Parent watershed

hybas-20800164601591 km²

2 administrative regions crossed (GADM L2)

  • Bouches-du-Rhône
    Provence-Alpes-Côte d'Azur · France
    57.5 km
    in this dpt
  • Var
    Provence-Alpes-Côte d'Azur · France
    10.2 km
    in this dpt
18 communes (L5)

4 intersecting protected areas

1 page = 1 named river (aggregation of 20 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

1 972 distinct species · 28 713 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 36 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 : 20 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 151 interactions GloBI sur 6 types (connectance 21.5%, filtre Serrano α=0.2). 18 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
151
Connectance
0.215
Patrimoniales
2
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

8,6m³/s

Max Strahler

3

Segments matched

20

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