HydroBASINS lev08 watershed · #2080020600
Bassin · #2080020600
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 : Gironde
Sub-basin area
12,5km²
Upstream area
12,5km²
Discharge
0,07m³/s
Mean elev.
2m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 11.7 km²93.5% of basin
5 communes (GADM L5)Available for FRA, RWA
- Ambès11.23 km²46% commune
- Bayon-sur-Gironde0.42 km²6% commune
- Macau0.04 km²0% commune
- Saint-Seurin-de-Bourg0.01 km²0% commune
- Bourg0.01 km²0% commune
7 intersecting protected areas
La Dordogne
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.34 km² overlap
Marais du Bec d'Ambès
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.01 km² overlap
La Garonne en Nouvelle-Aquitaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.53 km² overlap
Ile d\'ambes
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
0.27 km² overlap
Estuaire de la Gironde
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.20 km² overlap
Médoc
IUCN VRegional Nature Park
0.16 km² overlap
Marine Nature Park
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 102 distinct species · 29 888 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 Bassin · #2080020600 : 34 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 6 types (connectance 16.3%, filtre Serrano α=0.2). 7 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°
12,8°C
Annual rain
909mm
Moisture idx (CMI)
-0,05
Runoff
508mm/an
PET
953mm
AET
668mm
Mean slope
0,3°
Water table
4cm
Forest
0%
Crops
63%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)