Grande Brière, marais de Donges et du Brivet
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2019
198 km²
Commune · FRA
Guenrouet
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
748
Observations
7 975
Area
70,6km²
Ecological tissue
Sample of 20 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 Guenrouet : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 2 bulles famille, 30 interactions GloBI documentées sur 3 types (connectance 15.8%, filtre Serrano α=0.2). Les 2 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).
Espèces affichées
20
Interactions affichées
30
Connectance
0.158
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
748 distinct species · 7 975 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
12,0°C
Annual rain
858mm
Warmest m°
23,2°C
Coldest m°
2,8°C
Elevation: 25 m on average (min 2 m, max 64 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
12,0°C
Annual rain
858mm
Warmest month
23,2°C
Coldest month
2,8°C
Mean alt.
25m
Min
2m
Max
64m
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
5,8
Org. C
40,8g/kg
Clay
21,0%
Sand
30,0%
Silt
48,9%
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
5,8
Org. C
63,6g/kg
Clay
19,6%
Sand
30,6%
Silt
49,7%
5–15 cm
pH H₂O
5,8
Org. C
33,2g/kg
Clay
21,7%
Sand
28,9%
Silt
49,4%
15–30 cm
pH H₂O
5,8
Org. C
25,6g/kg
Clay
21,7%
Sand
30,5%
Silt
47,8%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest19.6%
Crops45.2%
Built-up0.7%
Bare soil0.5%
Other (grassland, water…)34.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 1 lakes · 3 rivers
Hydrology metrics for this exact territory
Stream length here
12,8km
Lake surface here
0,16km²
Basins crossed
2
Max stream order
3
Max drainage
1 138km²
Discharge in basins
0,7m³/s
Mean precip.
792mm/an
Mean T°
11,5°C
Moisture idx
-0,01
Max snow
5%
Mean runoff
507mm/an
Mean elev. (basins)
30m
Watersheds crossing here
Lakes (1, top by area)
Rivers / streams (3, 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
66,9%
Pesticides
44,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas5
IUCN Not Reported · 3IUCN IV · 2🌊 Marine · 1
Marais de Vilaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2016
109 km²
Forêt de Gâvre
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2019
45 km²
Sites abritant le Pleucedan officinal, plante hôte de la Noctuelle des Peucedan
IUCN IVBiotope Protection Order · 2020
1 km²
bocage des rives de l\'isac
IUCN IVLand acquired by a regional conservatory of natural areas · 2024
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.