Wetland of International Importance (Ramsar Site) · FRA
Baie du Mont Saint-Michel
- Area
- 459 km²
- IUCN cat.
- Not Reported
- Year
- 1994
Overview
- Designation
- Wetland of International Importance (Ramsar Site)
- Established
- 1994
- Managing authority
- Not Reported
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
4 662 distinct species · 438 536 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Baie du Mont Saint-Michel : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 96 interactions GloBI sur 4 types (connectance 13.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology7 basins · 4 lakes · 30 rivers
Hydrology metrics for this exact territory
Stream length here
67,2km
Lake surface here
1,50km²
Basins crossed
7
Max stream order
4
Max drainage
1 112km²
Discharge in basins
1,6m³/s
Mean precip.
744mm/an
Mean T°
11,2°C
Moisture idx
-0,00
Max snow
8%
Mean runoff
582mm/an
Mean elev. (basins)
54m
Watersheds crossing here
- Bassin du Guyoultsub-area627,3 km²overlap83.03 km²18%
- Bassin du Couesnonsub-area1 112,1 km²overlap24.51 km²5%
- Bassin du Tharsub-area363,8 km²overlap20.88 km²5%
- Bassin de Ruisseau de la Dufresnièresub-area77,6 km²overlap16.22 km²4%
- Bassin de la Sélunesub-area1 046 km²overlap8.92 km²2%
- Bassin de la Séesub-area468,7 km²overlap4.52 km²1%
- Basin #21810sub-area3,2 km²overlap2.34 km²1%
Lakes (4, top by area)
Rivers / streams (30, ord ≥ 4)
- Le Couesnonord 4len here19.29 km22%total89 km
- La Séluneord 4len here13.76 km19%total72 km
- La Séeord 3len here5.90 km18%total33 km
- Le Meleucord 2len here4.79 km72%total7 km
- Ruisseau de la Hirlaisord 1len here2.56 km50%total5 km
- Le Biez Jeanord 1len here2.33 km91%total3 km
- Biez du Meleucord 3len here2.22 km100%total2 km
- Le Lerreord 2len here1.52 km18%total8 km
- Le Chênelaisord 2len here1.52 km13%total11 km
- Le Guyoultord 2len here1.34 km5%total25 km
- Le Lerreord 1len here1.21 km32%total4 km
- Le Loisonord 1len here1.06 km11%total10 km
18 more river segmentssorted by Strahler order + length
- L'Oirord 2len here1.05 km7%total15 km
- Biez de Cardequinord 2len here1.01 km21%total5 km
- La Loisanceord 2len here0.98 km4%total24 km
- Ruisseau de l'Étangord 3len here0.91 km17%total5 km
- Ruisseau de Pont Melinord 2len here0.83 km3%total25 km
- Biez de la Ceinture Nordord 1len here0.74 km37%total2 km
- Le Tharord 2len here0.71 km3%total21 km
- La Braizeord 1len here0.66 km6%total11 km
- Ruisseau de la Dufresnièreord 2len here0.56 km8%total7 km
- Le Ludeord 1len here0.40 km20%total2 km
- Le Vergonord 1len here0.39 km7%total5 km
- Canal des Allemandsord 3len here0.38 km11%total4 km
- Le Tronçonord 2len here0.34 km2%total16 km
- Le Beuvronord 2len here0.26 km1%total25 km
- La Guergeord 1len here0.26 km1%total21 km
- La Vieille Bancheord 1len here0.16 km6%total3 km
- Ruisseau du Moulinord 1len here0.05 km2%total2 km
- Ruisseau de l'Oiselièreord 1len here≈ tangenttotal8 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 48.70168, -1.59566
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.