Regional Nature Park · fra
Marais Du Cotentin Et Du Bessin
- Area
- 1 475 km²
- IUCN cat.
- V
- Year
- 1991
Overview
- Designation
- Regional Nature Park
- IUCN category
- V · Paysage protégé
Paysage façonné par l'humain digne de conservation
- Established
- 1991
- Managing authority
- French Ministry in charge of the environment. In march 2012, name, acronym and address as follows : Ministère de l'Écologie, du Développement durable, des Transports et du Logement (MEDDTL) 92055 La Défense Cedex France. For regional parks network,
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
4 823 distinct species · 196 789 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 Marais Du Cotentin Et Du Bessin : 38 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) + 3 bulles famille, 63 interactions GloBI documentées sur 5 types (connectance 7.7%, filtre Serrano α=0.2). Les 3 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).
Hydrology7 basins · 5 lakes · 51 rivers
Hydrology metrics for this exact territory
Stream length here
440,6km
Lake surface here
16,68km²
Basins crossed
7
Max stream order
4
Max drainage
1 958km²
Discharge in basins
29,4m³/s
Mean precip.
825mm/an
Mean T°
11,3°C
Moisture idx
0,16
Max snow
9%
Mean runoff
697mm/an
Mean elev. (basins)
55m
Watersheds crossing here
- Bassin de la Douvesub-area1 449,7 km²overlap866.30 km²59%
- Bassin de la Viresub-area1 958,4 km²overlap256.24 km²17%
- Bassin de la Divettesub-area1 319,7 km²overlap145.52 km²10%
- Bassin de l'Aysub-area156,5 km²overlap126.92 km²9%
- Bassin du Pont de la Reinesub-area145 km²overlap42.61 km²3%
- Bassin de la Seullessub-area695,3 km²overlap30.78 km²2%
- Basin #21980sub-area10 km²overlap7.04 km²0%
Lakes (5, top by area)
Rivers / streams (51, ord ≥ 4)
- La Vireord 4len here37.43 km28%total135 km
- La Tauteord 3len here35.00 km77%total45 km
- La Douveord 4len here34.30 km58%total59 km
- L'Ayord 2len here29.81 km88%total34 km
- Le Merderetord 3len here24.49 km71%total35 km
- La Sèvesord 3len here24.03 km100%total24 km
- L'Aure Inférieureord 3len here16.22 km53%total31 km
- La Senelleord 4len here15.03 km100%total15 km
- Le Fil de Gorgesord 3len here15.00 km92%total16 km
- La Saudreord 3len here14.02 km68%total21 km
- La Terretteord 2len here12.46 km52%total24 km
- Le Lozonord 3len here11.48 km51%total23 km
39 more river segmentssorted by Strahler order + length
- Ancien Canal de Vire et Tauteord 3len here11.37 km100%total11 km
- Le Pont de la Reineord 2len here11.32 km100%total11 km
- La Venloueord 2len here10.12 km86%total12 km
- La Brosseord 2len here9.57 km79%total12 km
- La Tortonneord 3len here9.34 km62%total15 km
- La Grande Criqueord 1len here9.11 km100%total9 km
- Ruisseau de Coiselord 2len here8.59 km59%total15 km
- L'Elleord 3len here7.35 km26%total28 km
- Le Merderet (ancien Bras de la Douve)ord 4len here6.89 km100%total7 km
- Le Buissonord 2len here6.56 km100%total7 km
- Le Lastelleord 1len here6.29 km100%total6 km
- L'Holerotteord 1len here6.27 km100%total6 km
- L'Esqueord 2len here5.53 km30%total18 km
- La Losqueord 1len here4.73 km87%total5 km
- La Sinopeord 2len here4.72 km21%total22 km
- Le Briquebostord 1len here4.65 km100%total5 km
- Le Vavasseurord 1len here4.56 km100%total5 km
- Ruisseau Tortogneord 2len here4.22 km82%total5 km
- Canal des Espagnolsord 3len here4.08 km100%total4 km
- Ruisseau du Port au Féronord 2len here3.83 km100%total4 km
- La Sietteord 2len here3.57 km41%total9 km
- Canal d'Auversord 3len here3.44 km100%total3 km
- Le Douitord 1len here3.19 km47%total7 km
- Ruisseau de Belle-Eauord 1len here2.72 km100%total3 km
- Ruisseau de Launayord 2len here2.59 km100%total3 km
- Balençonord 2len here2.55 km49%total5 km
- L'Olondeord 2len here2.28 km29%total8 km
- Ruisseau du Pont Boitardord 1len here2.18 km100%total2 km
- L'Ouveord 1len here1.81 km24%total7 km
- Ruisseau Saint-Martinord 1len here1.71 km100%total2 km
- Ruisseau de la Fauvrerieord 1len here1.69 km100%total2 km
- Le Rostyord 1len here1.46 km100%total1 km
- Ruisseau du Moulin d'Annebayord 1len here1.06 km27%total4 km
- La Griseord 1len here0.97 km19%total5 km
- Ruisseau des Sarcellesord 1len here0.46 km101%total0 km
- Ruisseau de la Fontaine Sainte-Marieord 1len here0.35 km30%total1 km
- Le Véretord 2len here0.14 km1%total11 km
- Ruisseau de la Léthumièreord 1len here0.05 km1%total5 km
- Le Maraisord 2len here≈ tangenttotal3 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
- 49.34695, -1.41601
- 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.