HydroBASINS lev08 watershed · #2080481780
Bassin de la Mayenne
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 1 administrative regions : Mayenne
Sub-basin area
134,8km²
Upstream area
2 911,9km²
Discharge
44,01m³/s
Mean elev.
95m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de la Mayenne811 km²
- Bassin de l'Ernée421 km²
1 dept-equivalent regions (GADM L2)
- Mayenne135.2 km²100.0% of basin
16 communes (GADM L5)Available for FRA, RWA
- ChangéMayenne32.20 km²90% commune
- LavalMayenne31.65 km²91% commune
- La Chapelle-AnthenaiseMayenne19.08 km²96% commune
- LouvernéMayenne15.79 km²77% commune
- Bonchamp-lès-LavalMayenne13.76 km²49% commune
- L'HuisserieMayenne6.60 km²44% commune
- ArgentréMayenne3.94 km²11% commune
- Saint-Jean-sur-MayenneMayenne2.97 km²16% commune
- EntrammesMayenne2.96 km²11% commune
- Saint-Germain-le-FouillouxMayenne2.90 km²19% commune
- Châlons-du-MaineMayenne2.26 km²23% commune
- Saint-BerthevinMayenne0.53 km²2% commune
- GesnesMayenne0.43 km²4% commune
- SacéMayenne0.11 km²1% commune
- Saint-Ouën-des-ToitsMayenne0.03 km²0% commune
- Saint-CéneréMayenne0.01 km²0% commune
2 intersecting protected areas
Bocage de Montsûrs à la forêt de Sillé-le-Guillaume
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.11 km² overlap
Biotope Protection Order
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 900 distinct species · 35 037 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Bassin de la Mayenne : 20 espèces reliées par 91 interactions GloBI sur 6 types (connectance 15.3%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,9°C
Annual rain
722mm
Moisture idx (CMI)
-0,12
Runoff
314mm/an
PET
822mm
AET
567mm
Mean slope
2,1°
Water table
182cm
Forest
0%
Crops
58%
Urban
33%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)