Marais Du Cotentin Et Du Bessin
IUCN VRegional Nature Park · 1991
1 475 km²
Commune · FRA
Créances
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
1 613
Observations
9 987
Area
21,3km²
Ecological tissue
Sample of 26 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).
RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique
Indicateurs du tissu écologique
Tissu écologique de Créances : 17 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 66 interactions GloBI sur 4 types (connectance 20.3%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
26
Interactions affichées
66
Connectance
0.203
Patrimoniales
2
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
1 613 distinct species · 9 987 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,8°C
Annual rain
929mm
Warmest m°
19,7°C
Coldest m°
4,7°C
Elevation: 14 m on average (min 4 m, max 31 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,8°C
Annual rain
929mm
Warmest month
19,7°C
Coldest month
4,7°C
Mean alt.
14m
Min
4m
Max
31m
Std. dev.
9m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(100 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,1
Org. C
39,5g/kg
Clay
23,4%
Sand
26,1%
Silt
50,5%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to Manche
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,1
Org. C
63,5g/kg
Clay
21,8%
Sand
26,8%
Silt
51,3%
5–15 cm
pH H₂O
6,2
Org. C
32,2g/kg
Clay
23,8%
Sand
25,8%
Silt
50,5%
15–30 cm
pH H₂O
6,2
Org. C
22,8g/kg
Clay
24,7%
Sand
25,7%
Silt
49,6%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest18.1%
Crops35.5%
Built-up1.7%
Bare soil1.6%
Other (grassland, water…)43.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 0 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
3,1km
Basins crossed
2
Max stream order
2
Max drainage
157km²
Discharge in basins
0,5m³/s
Mean precip.
818mm/an
Mean T°
11,5°C
Moisture idx
0,15
Max snow
7%
Mean runoff
681mm/an
Mean elev. (basins)
38m
Watersheds crossing here
Rivers / streams (2, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
0,6nW
Built-up
168,5%
Pesticides
45,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas3
IUCN V · 1IUCN Not Reported · 1IUCN IV · 1🌊 Marine · 2
Havre de Saint-Germain-sur-Ay et Landes de Lessay
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2014
41 km²
far west
IUCN IVLand acquired by a regional conservatory of natural areas · 2017
0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
France-specific data (Phase 2)
ZNIEFF, Natura 2000, INPN protected spaces, BNV-D pesticides, Naïades water quality, SAFRAN fine climate, BRGM lithology — Layer FR to load in Phase 2.