Ruisseau· 18 segments
Le Lignon
Crosses 3 administrative regions : Ardèche, Haute-Loire, Loire
Total length
184km
Max discharge
5,9m³/s
Max Strahler
3
Segments matched
18
River geography3 admin regions · 36 communes
3 administrative regions crossed (GADM L2)
- Haute-LoireAuvergne-Rhône-Alpes · France64.3 kmin this dpt
- LoireAuvergne-Rhône-Alpes · France41.3 kmin this dpt
- ArdècheAuvergne-Rhône-Alpes · France0.0 kmin this dpt
36 communes (L5)For countries with L5
- Yssingeaux14.52 km
- Grazac8.70 km
- Le Chambon-sur-Lignon8.65 km
- Saint-Georges-en-Couzan7.40 km
- Tence6.20 km
- Chalmazel5.88 km
- Saint-Étienne-le-Molard5.73 km
- Sauvain5.14 km
- Les Vastres4.76 km
- Fay-sur-Lignon4.13 km
- Poncins3.76 km
- Cleppé3.65 km
- Chaudeyrolles3.57 km
- Lapte3.45 km
- Sail-sous-Couzan3.38 km
- Chenereilles3.38 km
- Mazet-Saint-Voy2.99 km
- Saint-Bonnet-le-Courreau2.49 km
- Saint-Maurice-de-Lignon1.98 km
- Jeansagnière1.79 km
- Saint-Jeures1.50 km
- Leigneux1.15 km
- Trelins0.84 km
- Saint-Front0.50 km
- Saint-Sixte0.09 km
- Marcoux0.03 km
- Feurs0.00 km
- Sainte-Foy-Saint-Sulpice0.00 km
- Sainte-Agathe-la-Bouteresse0.00 km
- Montverdun0.00 km
- Mars0.00 km
- Débats-Rivière-d'Orpra0.00 km
- Araules0.00 km
- Saint-Just-en-Bas0.00 km
- Civens0.00 km
- Les Villettes0.00 km
10 intersecting protected areas
Livradois-Forez
IUCN VRegional Nature Park
Monts D\'Ardèche
IUCN VRegional Nature Park
Gorges de la Loire
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Plaine du Forez
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Parties sommitales du Forez et hautes chaumes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Milieux alluviaux et aquatiques de la Loire
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Mézenc
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Lignon, Vizezy, Anzon et leurs affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Haute vallée du Lignon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 more protected areassorted by area
Écozone du Forez
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1 page = 1 named river (aggregation of 18 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
501 distinct species · 1 715 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Le Lignon : 12 espèces reliées par 105 interactions GloBI sur 6 types (connectance 35.0%, filtre Serrano α=0.2). 13 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
184km
Max discharge
5,9m³/s
Max Strahler
3
Segments matched
18
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.