Ruisseau· 22 segments
La Seudre
Crosses 1 administrative regions : Charente-Maritime
Total length
69km
Max discharge
9m³/s
Max Strahler
3
Segments matched
22
River geography1 admin regions · 30 communes
1 administrative regions crossed (GADM L2)
- Charente-MaritimeNouvelle-Aquitaine · France68.6 kmin this dpt
30 communes (L5)For countries with L5
- Saint-Germain-du-Seudre6.88 km
- Virollet6.50 km
- Meursac6.20 km
- Le Gua5.19 km
- Saint-André-de-Lidon4.92 km
- Bois4.32 km
- Corme-Écluse4.12 km
- Champagnolles3.88 km
- L'Éguille3.47 km
- Saint-Fort-sur-Gironde3.46 km
- Le Chay3.02 km
- Thaims2.50 km
- Lorignac2.17 km
- Montpellier-de-Médillan2.10 km
- Cravans1.86 km
- Gémozac1.59 km
- Saint-Sulpice-de-Royan1.48 km
- Saujon1.17 km
- Mornac-sur-Seudre1.14 km
- Plassac0.85 km
- Saint-Genis-de-Saintonge0.76 km
- Saint-Romain-de-Benet0.44 km
- Mortagne-sur-Gironde0.32 km
- Grézac0.29 km
- Semussac0.00 km
- Saint-Ciers-du-Taillon0.00 km
- Floirac0.00 km
- Médis0.00 km
- Épargnes0.00 km
- Brie-sous-Mortagne0.00 km
4 intersecting protected areas
Marine Nature Park
Marais et estuaire de la Seudre, île d'Oléron
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Marais de la Seudre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
La pointe de l\'eguille
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
1 page = 1 named river (aggregation of 22 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
866 distinct species · 8 283 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 La Seudre : 27 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 119 interactions GloBI sur 6 types (connectance 16.1%, filtre Serrano α=0.2). 12 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
69km
Max discharge
9,0m³/s
Max Strahler
3
Segments matched
22
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.