Ruisseau· 6 segments
Canal de Nantes à Brest
Crosses 4 administrative regions : Côtes-d'Armor, Ille-et-Vilaine, Loire-Atlantique, Morbihan
Total length
135km
Max discharge
10,9m³/s
Max Strahler
3
Segments matched
6
River geography4 admin regions · 17 communes
4 administrative regions crossed (GADM L2)
- Loire-AtlantiquePays de la Loire · France15.7 kmin this dpt
- MorbihanBretagne · France7.5 kmin this dpt
- Ille-et-VilaineBretagne · France1.7 kmin this dpt
- Côtes-d'ArmorBretagne · France0.2 kmin this dpt
17 communes (L5)For countries with L5
- Bréhan4.58 km
- Fégréac3.80 km
- Blain3.66 km
- Sévérac3.65 km
- Gueltas2.96 km
- La Chevallerais2.52 km
- Redon1.65 km
- Guenrouet1.56 km
- Héric0.50 km
- Saint-Maudan0.20 km
- Bains-sur-Oust0.00 km
- Saint-Perreux0.00 km
- Rohan0.00 km
- Saffré0.00 km
- Pleugriffet0.00 km
- Crédin0.00 km
- Saint-Gonnery0.00 km
1 intersecting protected areas
Marais de Vilaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 6 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
610 distinct species · 1 806 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 Canal de Nantes à Brest : 30 espèces + 6 bulles famille, 74 interactions GloBI documentées sur 5 types (connectance 11.7%, filtre Serrano α=0.2). Les 6 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
135km
Max discharge
10,9m³/s
Max Strahler
3
Segments matched
6
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.