Ontologia

Commune · FRA

Arçais

France

CfbTemperate, no dry season, warm summer(100 %)

Species observed

1 206

Observations

18 107

Area

14,8km²

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

1 206 distinct species · 18 107 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

18 107 obs · 2 cellules
Obs. / cellule
≥ 14 846
14 846–14 845
14 846–14 845
14 846–14 845
< 14 846

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Climate

Mean T°

12,7°C

Annual rain

827mm

Warmest m°

24,8°C

Coldest m°

2,9°C

Elevation: 7 m on average (min 3 m, max 24 m)

Bioclimatic detailsExpert
Annual mean temp.
12,7°C
Annual rain
827mm
Warmest month
24,8°C
Coldest month
2,9°C
Mean alt.
7m
Min
3m
Max
24m
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

7,0

Org. C

37,5g/kg

Clay

35,7%

Sand

16,7%

Silt

47,7%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: scGLiMaggregated to Deux-Sèvres

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,9
Org. C
60,2g/kg
Clay
33,8%
Sand
16,7%
Silt
49,5%
5–15 cm
pH H₂O
7,0
Org. C
27,8g/kg
Clay
36,8%
Sand
15,5%
Silt
47,7%
15–30 cm
pH H₂O
7,0
Org. C
24,3g/kg
Clay
36,4%
Sand
17,8%
Silt
45,8%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest26.3%
Crops45.6%
Built-up0.6%
Bare soil0.3%
Other (grassland, water…)27.2%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology1 basins · 0 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

3,0km

Basins crossed

1

Max stream order

4

Max drainage

1 291km²

Discharge in basins

2,5m³/s

Mean precip.

777mm/an

Mean T°

12,3°C

Moisture idx

-0,10

Max snow

3%

Mean runoff

520mm/an

Mean elev. (basins)

13m

Watersheds crossing here

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

0hab/km²

Built-up

62,8%

Pesticides

43,2kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas6

IUCN Not Reported · 3IUCN V · 1IUCN III · 1IUCN IV · 1🌊 Marine · 5

Marais poitevin

IUCN III

Wetland of International Importance (Ramsar Site) · 2023

690 km²

Marais poitevin

IUCN Not Reported

Special Protection Area (Birds Directive) · 2019

682 km²

Marais Poitevin

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2014

479 km²

Marais Poitevin

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2007

203 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.