Rivière· 20 segments
La Rance
Crosses 2 administrative regions : Côtes-d'Armor, Ille-et-Vilaine
Total length
162km
Max discharge
15,9m³/s
Max Strahler
4
Segments matched
20
River geography2 admin regions · 35 communes
2 administrative regions crossed (GADM L2)
- Côtes-d'ArmorBretagne · France77.1 kmin this dpt
- Ille-et-VilaineBretagne · France3.5 kmin this dpt
35 communes (L5)For countries with L5
- Plumaugat7.66 km
- Saint-Jacut-du-Mené6.54 km
- Éréac6.32 km
- Lanrelas6.10 km
- Mérillac4.95 km
- Plouër-sur-Rance4.39 km
- Lanvallay4.28 km
- Quédillac3.50 km
- Saint-Vran3.47 km
- Plouasne3.29 km
- Caulnes3.14 km
- Saint-Launeuc2.81 km
- Langourla2.60 km
- Évran2.41 km
- Saint-Samson-sur-Rance2.04 km
- La Chapelle-Blanche2.00 km
- Saint-Jouan-de-l'Isle1.77 km
- Pleudihen-sur-Rance1.61 km
- Tréfumel1.49 km
- Guitté1.49 km
- La Vicomté-sur-Rance1.42 km
- Saint-Juvat1.22 km
- Calorguen1.16 km
- Taden1.00 km
- Léhon0.98 km
- Les Champs-Géraux0.70 km
- Saint-Carné0.66 km
- Dinan0.61 km
- Saint-Maden0.60 km
- Collinée0.32 km
- Guenroc0.07 km
- Saint-Hélen0.02 km
- Le Quiou0.00 km
- Le Gouray0.00 km
- Saint-André-des-Eaux0.00 km
3 intersecting protected areas
Regional Nature Park
Estuaire de la Rance
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Carrière de la Perchais
IUCN Not ReportedGeotope Protection Order
1 page = 1 named river (aggregation of 20 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
319 distinct species · 804 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 La Rance : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 120 interactions GloBI sur 6 types (connectance 17.1%, filtre Serrano α=0.2). 14 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
162km
Max discharge
15,9m³/s
Max Strahler
4
Segments matched
20
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.