Ruisseau· 20 segments
L'Arc
Crosses 2 administrative regions : Bouches-du-Rhône, Var
Total length
213km
Max discharge
8,6m³/s
Max Strahler
3
Segments matched
20
River geography2 admin regions · 18 communes
2 administrative regions crossed (GADM L2)
- Bouches-du-RhôneProvence-Alpes-Côte d'Azur · France57.5 kmin this dpt
- VarProvence-Alpes-Côte d'Azur · France10.2 kmin this dpt
18 communes (L5)For countries with L5
- Aix-en-Provence9.80 km
- Berre-l'Étang9.29 km
- Pourrières6.93 km
- Rousset6.06 km
- L'Etang de l'Olivier6.02 km
- Ventabren5.52 km
- Trets5.45 km
- Pourcieux3.26 km
- Velaux3.09 km
- Coudoux2.89 km
- La Fare-les-Oliviers2.58 km
- Puyloubier1.82 km
- Meyreuil1.82 km
- Peynier1.32 km
- Châteauneuf-le-Rouge1.17 km
- Le Tholonet0.34 km
- Fuveau0.30 km
- Ollières0.00 km
4 intersecting protected areas
Garrigues de Lançon et Chaînes alentour
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Plateau de l'Arbois
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Marais et zones humides liés à l'étang de Berre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Salines de l'Étang de Berre
IUCN Not ReportedSpecial Protection Area (Birds Directive)
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).
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).
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.