Marais de l'Erdre
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2019
28 km²
Commune · FRA
Casson
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
2 299
Observations
26 527
Area
15,8km²
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
2 299 distinct species · 26 527 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
12,0°C
Annual rain
812mm
Warmest m°
23,5°C
Coldest m°
2,7°C
Elevation: 24 m on average (min 6 m, max 35 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
12,0°C
Annual rain
812mm
Warmest month
23,5°C
Coldest month
2,7°C
Mean alt.
24m
Min
6m
Max
35m
Std. dev.
7m
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
5,9
Org. C
33,8g/kg
Clay
17,0%
Sand
33,1%
Silt
49,8%
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
5,9
Org. C
57,2g/kg
Clay
16,2%
Sand
33,8%
Silt
49,9%
5–15 cm
pH H₂O
5,9
Org. C
22,2g/kg
Clay
16,9%
Sand
32,9%
Silt
50,2%
15–30 cm
pH H₂O
5,9
Org. C
22,1g/kg
Clay
17,9%
Sand
32,7%
Silt
49,4%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest11.1%
Crops57.1%
Built-up1.4%
Bare soil0.8%
Other (grassland, water…)29.6%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 0 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
3,6km
Basins crossed
1
Max stream order
1
Max drainage
1 019km²
Discharge in basins
0,2m³/s
Mean precip.
751mm/an
Mean T°
11,4°C
Moisture idx
-0,09
Max snow
5%
Mean runoff
437mm/an
Mean elev. (basins)
44m
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
0,2nW
Built-up
145,2%
Pesticides
43,7kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas3
IUCN Not Reported · 2IUCN IV · 1
Marais de l'Erdre
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2014
26 km²
Combles Et Clocher De L\'Église Saint- Louis À Casson
IUCN IVBiotope Protection Order · 2012
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.