Ruisseau· 3 segments
L'Orthe
Crosses 2 administrative regions : Mayenne, Sarthe
Total length
37km
Max discharge
14,7m³/s
Max Strahler
3
Segments matched
3
River geography2 admin regions · 11 communes
2 administrative regions crossed (GADM L2)
- SarthePays de la Loire · France18.0 kmin this dpt
- MayennePays de la Loire · France12.3 kmin this dpt
11 communes (L5)For countries with L5
- Mont-Saint-Jean7.53 km
- Douillet6.20 km
- Saint-Martin-de-Connée6.16 km
- Saint-Pierre-sur-Orthe5.98 km
- Sougé-le-Ganelon3.71 km
- Montreuil-le-Chétif0.55 km
- Izé0.19 km
- Vimarcé0.00 km
- Saint-Georges-le-Gaultier0.00 km
- Saint-Paul-le-Gaultier0.00 km
- Saint-Germain-de-Coulamer0.00 km
1 intersecting protected areas
Normandie-Maine
IUCN VRegional Nature Park
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
1 182 distinct species · 12 562 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 L'Orthe : 17 espèces reliées par 26 interactions GloBI sur 3 types (connectance 11.3%, filtre Serrano α=0.2). 5 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
37km
Max discharge
14,7m³/s
Max Strahler
3
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.