Ruisseau· 3 segments
La Sonce
Crosses 2 administrative regions : Manche, Orne
Total length
18km
Max discharge
1,3m³/s
Max Strahler
2
Segments matched
3
River geography2 admin regions · 9 communes
2 administrative regions crossed (GADM L2)
9 communes (L5)For countries with L5
- Saint-Georges-de-Rouelley4.98 km
- Rouellé4.40 km
- Barenton4.35 km
- Ger2.96 km
- La Haute-Chapelle1.43 km
- Saint-Gilles-des-Marais0.17 km
- Saint-Roch-sur-Égrenne0.00 km
- Lonlay-l'Abbaye0.00 km
- Saint-Mars-d'Égrenne0.00 km
6 intersecting protected areas
Normandie-Maine
IUCN VRegional Nature Park
Landes du Tertre Bizet et Fosse Arthour
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Biotope Protection Order
Anciennes mines de Barenton et de Bion
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
marais de rouelle
IUCN IVLand acquired by a regional conservatory of natural areas
lande du gue safray
IUCN IVLand acquired by a regional conservatory of natural areas
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
1 918 distinct species · 7 064 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Sonce : 13 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 321 interactions GloBI sur 5 types (connectance 14.5%, filtre Serrano α=0.2). 54 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
18km
Max discharge
1,3m³/s
Max Strahler
2
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.