Fleuve
La Loire - Bras Saint-Jean
⚠ Partial coverage : only 1 named segment matched so far. The real fleuve extends much further (Strahler order 7 indicates a major river). Cross-source ingest in progress — values below reflect only the matched segment.
Crosses 1 administrative regions : Maine-et-Loire
Max discharge
782,8m³/s
Max Strahler
7
Segments matched
1
River geography1 admin regions · 6 communes
1 administrative regions crossed (GADM L2)
- Maine-et-LoirePays de la Loire · France3.8 kmin this dpt
6 communes (L5)For countries with L5
- Saint-Jean-de-la-Croix1.80 km
- Sainte-Gemmes-sur-Loire1.66 km
- Mûrs-Erigné0.31 km
- Bouchemaine0.00 km
- Denée0.00 km
- Les Ponts-de-Cé0.00 km
5 intersecting protected areas
Vallée de la Loire de Nantes aux Ponts-de-Cé et ses annexes
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Vallée de la Loire de Nantes aux Ponts-de-Cé et ses annexes
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Special Areas of Conservation (Habitats Directive)
Basses vallées angevines et prairies de la Baumette
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Basses Vallées Angevines
IUCN Not ReportedWetland of International Importance (Ramsar Site)
1 page = 1 named river (aggregation of 1 HydroRIVERS v10 segment). Spatial join cached after first hit.
Species present
1 896 distinct species · 19 042 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 La Loire - Bras Saint-Jean : 28 espèces + 2 bulles famille, 73 interactions GloBI documentées sur 2 types (connectance 16.8%, filtre Serrano α=0.2). Les 2 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Matched len.
4,8km
Max discharge
782,8m³/s
Max Strahler
7
Segments matched
1
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.