Basse vallée de l'Arnon
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2014
13 km²
Commune · FRA
Marçais
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
1 647
Observations
25 094
Area
29,5km²
Ecological tissue
Sample of 39 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 Marçais : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 115 interactions GloBI sur 5 types (connectance 15.5%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
39
Interactions affichées
115
Connectance
0.155
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
1 647 distinct species · 25 094 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,7°C
Annual rain
816mm
Warmest m°
24,6°C
Coldest m°
1,1°C
Elevation: 201 m on average (min 180 m, max 228 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,7°C
Annual rain
816mm
Warmest month
24,6°C
Coldest month
1,1°C
Mean alt.
201m
Min
180m
Max
228m
Std. dev.
11m
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
6,4
Org. C
26,2g/kg
Clay
23,4%
Sand
38,7%
Silt
37,8%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiMaggregated to Cher
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,3
Org. C
43,8g/kg
Clay
22,8%
Sand
39,4%
Silt
37,8%
5–15 cm
pH H₂O
6,4
Org. C
21,0g/kg
Clay
23,2%
Sand
38,0%
Silt
38,7%
15–30 cm
pH H₂O
6,4
Org. C
13,8g/kg
Clay
24,3%
Sand
38,8%
Silt
36,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest12.0%
Crops68.8%
Built-up0.3%
Bare soil0.3%
Other (grassland, water…)18.5%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 0 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
6,2km
Basins crossed
2
Max stream order
3
Max drainage
4 517km²
Discharge in basins
0,7m³/s
Mean precip.
726mm/an
Mean T°
11,0°C
Moisture idx
-0,18
Max snow
5%
Mean runoff
237mm/an
Mean elev. (basins)
183m
Watersheds crossing here
Rivers / streams (2, 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
34,4%
Pesticides
44,1kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 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.