HydroBASINS lev08 watershed · #2080478220
Bassin de l'Ernée
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
421,1km²
Upstream area
421,2km²
Discharge
5,77m³/s
Mean elev.
153m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- Mayenne422.4 km²100.0% of basin
25 communes (GADM L5)Available for FRA, RWA
- MontenayMayenne38.50 km²100% commune
- ErnéeMayenne36.13 km²100% commune
- ChaillandMayenne35.55 km²100% commune
- LarchampMayenne34.56 km²84% commune
- Saint-Denis-de-GastinesMayenne33.66 km²69% commune
- Saint-Pierre-des-LandesMayenne31.01 km²73% commune
- Saint-Hilaire-du-MaineMayenne29.15 km²95% commune
- JuvignéMayenne26.51 km²42% commune
- AndouilléMayenne26.44 km²71% commune
- VautorteMayenne24.51 km²100% commune
- La BaconnièreMayenne13.45 km²49% commune
- Saint-Germain-le-GuillaumeMayenne13.29 km²100% commune
- Saint-Germain-le-FouillouxMayenne12.51 km²81% commune
- CarellesMayenne11.57 km²88% commune
- Saint-Ouën-des-ToitsMayenne8.88 km²42% commune
- MontaudinMayenne7.92 km²36% commune
- Châtillon-sur-ColmontMayenne7.00 km²17% commune
- La PellerineMayenne6.76 km²83% commune
- Saint-Jean-sur-MayenneMayenne6.04 km²33% commune
- Saint-Berthevin-la-TannièreMayenne5.65 km²32% commune
- LevaréMayenne5.30 km²46% commune
- PlacéMayenne3.62 km²14% commune
- La BigottièreMayenne2.15 km²12% commune
- ChangéMayenne2.08 km²6% commune
- Colombiers-du-PlessisMayenne0.16 km²1% commune
7 intersecting protected areas
Regional Nature Reserve
0.04 km² overlap
Geotope Protection Order
0.02 km² overlap
Les gisements fossilifères des Monneries
IUCN Not ReportedGeotope Protection Order
0.02 km² overlap
Les gisements fossilifères de la Touche
IUCN Not ReportedGeotope Protection Order
0.01 km² overlap
Geotope Protection Order
0.01 km² overlap
Geotope Protection Order
0.00 km² overlap
Les gisements fossilifères de la Galette -Bel-Air
IUCN Not ReportedGeotope Protection Order
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 024 distinct species · 52 600 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 Bassin de l'Ernée : 24 espèces reliées par 96 interactions GloBI sur 5 types (connectance 15.2%, filtre Serrano α=0.2). 12 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°
10,5°C
Annual rain
753mm
Moisture idx (CMI)
-0,05
Runoff
440mm/an
PET
794mm
AET
569mm
Mean slope
2,2°
Water table
187cm
Forest
1%
Crops
25%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)