Wetland of International Importance (Ramsar Site) · fra
Marais du Cotentin et du Bessin, Baie des Veys
- Area
- 389 km²
- IUCN cat.
- Not Reported
- Year
- 1991
Overview
- Designation
- Wetland of International Importance (Ramsar Site)
- Established
- 1991
- Managing authority
- Not Reported
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
4 953 distinct species · 217 309 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 Marais du Cotentin et du Bessin, Baie des Veys : 28 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 89 interactions GloBI sur 4 types (connectance 14.1%, 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).
Hydrology5 basins · 5 lakes · 36 rivers
Hydrology metrics for this exact territory
Stream length here
273,2km
Lake surface here
16,67km²
Basins crossed
5
Max stream order
4
Max drainage
1 958km²
Discharge in basins
7,1m³/s
Mean precip.
823mm/an
Mean T°
11,2°C
Moisture idx
0,16
Max snow
9%
Mean runoff
701mm/an
Mean elev. (basins)
57m
Watersheds crossing here
Lakes (5, top by area)
Rivers / streams (36, ord ≥ 4)
- La Vireord 4len here32.78 km24%total135 km
- La Douveord 4len here31.38 km53%total59 km
- La Tauteord 3len here27.77 km61%total45 km
- Le Merderetord 3len here21.25 km61%total35 km
- La Sèvesord 3len here18.08 km75%total24 km
- L'Aure Inférieureord 3len here15.24 km49%total31 km
- Le Fil de Gorgesord 3len here13.08 km80%total16 km
- La Saudreord 3len here11.01 km53%total21 km
- Ancien Canal de Vire et Tauteord 3len here10.90 km96%total11 km
- Le Lozonord 3len here8.77 km39%total23 km
- La Senelleord 4len here8.70 km58%total15 km
- La Grande Criqueord 1len here7.62 km84%total9 km
24 more river segmentssorted by Strahler order + length
- Le Merderet (ancien Bras de la Douve)ord 4len here6.84 km99%total7 km
- L'Elleord 3len here5.39 km19%total28 km
- La Venloueord 2len here4.82 km41%total12 km
- La Terretteord 2len here4.75 km20%total24 km
- Ruisseau de Coiselord 2len here4.63 km32%total15 km
- Canal des Espagnolsord 3len here4.08 km100%total4 km
- La Tortonneord 3len here3.90 km26%total15 km
- L'Holerotteord 1len here3.89 km62%total6 km
- L'Esqueord 2len here3.69 km20%total18 km
- Ruisseau du Moulin d'Annebayord 1len here3.36 km85%total4 km
- La Losqueord 1len here3.15 km58%total5 km
- Canal d'Auversord 3len here3.12 km91%total3 km
- Le Briquebostord 1len here2.75 km59%total5 km
- Le Lastelleord 1len here2.64 km42%total6 km
- Ruisseau du Port au Féronord 2len here2.62 km68%total4 km
- Ruisseau de Launayord 2len here2.58 km99%total3 km
- Le Buissonord 2len here1.50 km23%total7 km
- Ruisseau de la Fauvrerieord 1len here1.16 km69%total2 km
- Balençonord 2len here0.68 km13%total5 km
- Ruisseau du Pont Boitardord 1len here0.47 km22%total2 km
- Ruisseau Saint-Martinord 1len here0.23 km13%total2 km
- Ruisseau des Sarcellesord 1len here0.22 km49%total0 km
- Le Rostyord 1len here0.18 km12%total1 km
- Ruisseau Tortogneord 2len here≈ tangenttotal5 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
- 49.32819, -1.12816
- 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.