Marais Breton, Baie de Bourgneuf, Ile de Noirmoutier et Forêt de Monts
IUCN IVWetland of International Importance (Ramsar Site) · 2017
558 km²
Commune · FRA
Fresnay-en-Retz
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
909
Observations
22 011
Area
21km²
Ecological tissue
Graphe en cours d’indexation
Calcul du tissu écologique de cette entité.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).
Species present
909 distinct species · 22 011 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
12,4°C
Annual rain
839mm
Warmest m°
23,1°C
Coldest m°
3,3°C
Elevation: 18 m on average (min 2 m, max 35 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
12,4°C
Annual rain
839mm
Warmest month
23,1°C
Coldest month
3,3°C
Mean alt.
18m
Min
2m
Max
35m
Std. dev.
13m
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
6,0
Org. C
38,6g/kg
Clay
21,6%
Sand
37,1%
Silt
41,3%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to Loire-Atlantique
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,0
Org. C
66,2g/kg
Clay
21,3%
Sand
37,1%
Silt
41,7%
5–15 cm
pH H₂O
6,0
Org. C
25,8g/kg
Clay
20,7%
Sand
36,9%
Silt
42,4%
15–30 cm
pH H₂O
6,0
Org. C
23,9g/kg
Clay
22,9%
Sand
37,2%
Silt
40,0%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest12.5%
Crops44.0%
Built-up1.2%
Bare soil1.6%
Other (grassland, water…)40.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 0 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
2,3km
Basins crossed
2
Max stream order
1
Max drainage
1 307km²
Discharge in basins
0,0m³/s
Mean precip.
831mm/an
Mean T°
11,9°C
Moisture idx
0,04
Max snow
5%
Mean runoff
538mm/an
Mean elev. (basins)
14m
Watersheds crossing here
Rivers / streams (1, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,1nW
Built-up
121,7%
Pesticides
44,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas3
IUCN Not Reported · 2IUCN IV · 1🌊 Marine · 3
Marais Breton, baie de Bourgneuf, île de Noirmoutier et forêt de Monts
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2018
558 km²
Marais Breton, baie de Bourgneuf, île de Noirmoutier et forêt de Monts
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2014
524 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.