HydroBASINS lev08 watershed · #2080497350
Bassin de la Loire
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 : Maine-et-Loire
Sub-basin area
36,9km²
Upstream area
86 064,1km²
Discharge
781,64m³/s
Mean elev.
28m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de l'Authion1312 km²
- Bassin de la Loire277 km²
1 dept-equivalent regions (GADM L2)
- 37.0 km²100.0% of basin
8 communes (GADM L5)Available for FRA, RWA
- Les Ponts-de-Cé14.38 km²72% commune
- Angers8.20 km²18% commune
- Juigné-sur-Loire5.50 km²46% commune
- Sainte-Gemmes-sur-Loire3.65 km²25% commune
- Mûrs-Erigné2.92 km²17% commune
- Saint-Melaine-sur-Aubance1.59 km²33% commune
- Trélazé0.70 km²6% commune
- Saint-Barthélemy-d'Anjou0.07 km²0% commune
4 intersecting protected areas
Vallée de la Loire des Ponts-de-Cé à Montsoreau
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.15 km² overlap
Vallée de la Loire de Nantes aux Ponts-de-Cé et ses annexes
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.44 km² overlap
Vallée de la Loire de Nantes aux Ponts-de-Cé et ses annexes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
3.43 km² overlap
Vallée de la Loire des Ponts-de-Cé à Montsoreau
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.64 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 977 distinct species · 96 081 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Loire : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 5 types (connectance 12.6%, filtre Serrano α=0.2). 11 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°
11,6°C
Annual rain
652mm
Moisture idx (CMI)
-0,25
Runoff
221mm/an
PET
869mm
AET
550mm
Mean slope
0,8°
Water table
73cm
Forest
0%
Crops
26%
Urban
67%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)