Marais de Vilaine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2016
109 km²
Commune · FRA
Avessac
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
2 615
Observations
50 903
Area
76,4km²
Ecological tissue
Sample of 35 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 Avessac : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 108 interactions GloBI sur 5 types (connectance 18.2%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
35
Interactions affichées
108
Connectance
0.181
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
2 615 distinct species · 50 903 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,9°C
Annual rain
871mm
Warmest m°
23,1°C
Coldest m°
2,6°C
Elevation: 36 m on average (min 3 m, max 60 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,9°C
Annual rain
871mm
Warmest month
23,1°C
Coldest month
2,6°C
Mean alt.
36m
Min
3m
Max
60m
Std. dev.
15m
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
41,7g/kg
Clay
24,1%
Sand
25,8%
Silt
50,2%
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
60,0g/kg
Clay
21,6%
Sand
26,8%
Silt
51,6%
5–15 cm
pH H₂O
5,9
Org. C
37,8g/kg
Clay
25,4%
Sand
24,8%
Silt
49,7%
15–30 cm
pH H₂O
5,9
Org. C
27,3g/kg
Clay
25,1%
Sand
25,7%
Silt
49,2%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest15.1%
Crops54.4%
Built-up0.7%
Bare soil0.3%
Other (grassland, water…)29.6%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology3 basins · 3 lakes · 4 rivers
Hydrology metrics for this exact territory
Stream length here
16,6km
Lake surface here
0,94km²
Basins crossed
3
Max stream order
5
Max drainage
9 351km²
Discharge in basins
56,6m³/s
Mean precip.
757mm/an
Mean T°
11,3°C
Moisture idx
-0,06
Max snow
5%
Mean runoff
483mm/an
Mean elev. (basins)
49m
Watersheds crossing here
Lakes (3, top by area)
Rivers / streams (4, 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
65,7%
Pesticides
44,7kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1🌊 Marine · 1
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.