Marais Breton, Baie de Bourgneuf, Ile de Noirmoutier et Forêt de Monts
IUCN IVWetland of International Importance (Ramsar Site) · 2017
558 km²
Commune · FRA
Saint-Hilaire-de-Riez
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
2 451
Observations
37 119
Area
49,3km²
Ecological tissue
Sample of 47 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 Saint-Hilaire-de-Riez : 42 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 5 bulles famille, 82 interactions GloBI documentées sur 5 types (connectance 7.6%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Espèces affichées
47
Interactions affichées
82
Connectance
0.076
Patrimoniales
1
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
2 451 distinct species · 37 119 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
12,9°C
Annual rain
818mm
Warmest m°
22,1°C
Coldest m°
4,7°C
Elevation: 5 m on average (min -3 m, max 15 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
12,9°C
Annual rain
818mm
Warmest month
22,1°C
Coldest month
4,7°C
Mean alt.
5m
Min
-3m
Max
15m
Std. dev.
4m
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
6,5
Org. C
46,1g/kg
Clay
28,0%
Sand
31,3%
Silt
40,7%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to Vendée
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,5
Org. C
74,5g/kg
Clay
27,5%
Sand
31,4%
Silt
41,0%
5–15 cm
pH H₂O
6,5
Org. C
38,3g/kg
Clay
28,0%
Sand
31,1%
Silt
40,9%
15–30 cm
pH H₂O
6,5
Org. C
25,6g/kg
Clay
28,5%
Sand
31,2%
Silt
40,2%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest16.8%
Crops19.4%
Built-up5.3%
Bare soil1.4%
Other (grassland, water…)57.0%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 0 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
2,8km
Basins crossed
2
Max stream order
3
Max drainage
1 307km²
Discharge in basins
0,3m³/s
Mean precip.
830mm/an
Mean T°
11,9°C
Moisture idx
0,04
Max snow
5%
Mean runoff
542mm/an
Mean elev. (basins)
20m
Watersheds crossing here
Rivers / streams (1, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
1,8nW
Built-up
531,5%
Pesticides
42,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas4
IUCN IV · 2IUCN Not Reported · 2🌊 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
Dune du grand bec
IUCN IVLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy) · 2006
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.