Ontologia

Commune · FRA

Arnac-sur-Dourdou

France

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

Species observed

707

Observations

1 906

Area

16,9km²

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 Arnac-sur-Dourdou : 31 espèces + 4 bulles famille, 59 interactions GloBI documentées sur 6 types (connectance 9.9%, filtre Serrano α=0.2). Les 4 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
35
Interactions affichées
59
Connectance
0.099
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

707 distinct species · 1 906 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 995 obs · 8 cellules · 1888–2025
Obs. / cellule
≥ 688
688–687
363–687
166–362
< 166

Source : GBIF — observations agrégées par hexagones 0.02° × 0.02° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Climate

Mean T°

10,3°C

Annual rain

1 366mm

Warmest m°

23,5°C

Coldest m°

-0,2°C

Elevation: 736 m on average (min 586 m, max 885 m)

Bioclimatic detailsExpert
Annual mean temp.
10,3°C
Annual rain
1 366mm
Warmest month
23,5°C
Coldest month
-0,2°C
Mean alt.
736m
Min
586m
Max
885m
Std. dev.
93m
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

49,3g/kg

Clay

28,2%

Sand

37,0%

Silt

34,8%

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

Dominant lithology: scGLiMaggregated to Aveyron

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,4
Org. C
76,6g/kg
Clay
27,3%
Sand
37,4%
Silt
35,2%
5–15 cm
pH H₂O
6,5
Org. C
42,5g/kg
Clay
27,5%
Sand
37,5%
Silt
35,0%
15–30 cm
pH H₂O
6,5
Org. C
28,8g/kg
Clay
29,7%
Sand
36,1%
Silt
34,1%

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

Land cover

Forest68.4%
Crops13.2%
Built-up0.1%
Bare soil0.3%
Other (grassland, water…)18.1%

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

Hydrology2 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

3,7km

Basins crossed

2

Max stream order

2

Max drainage

1 806km²

Discharge in basins

0,3m³/s

Mean precip.

759mm/an

Mean T°

11,7°C

Moisture idx

-0,21

Max snow

5%

Mean runoff

586mm/an

Mean elev. (basins)

583m

Watersheds crossing here

Rivers / streams (1, ord ≥ 4)

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

Human pressure

Pop. density

0hab/km²

Built-up

6,9%

Pesticides

5,5kg/km²

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

Protected areas3

IUCN V · 2IUCN 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.