Ontologia

Commune · FRA

Alan

France

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

Species observed

1 170

Observations

6 213

Area

11,4km²

Ecological tissue

Sample of 30 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 Alan : 27 espèces + 3 bulles famille, 50 interactions GloBI documentées sur 4 types (connectance 11.5%, filtre Serrano α=0.2). Les 3 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
30
Interactions affichées
50
Connectance
0.115
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

1 170 distinct species · 6 213 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 213 obs · 1 cellules
Obs. / cellule
≥ 6 213
6 213–6 212
6 213–6 212
6 213–6 212
< 6 213

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

Climate

Mean T°

12,6°C

Annual rain

911mm

Warmest m°

25,1°C

Coldest m°

1,2°C

Elevation: 374 m on average (min 287 m, max 431 m)

Bioclimatic detailsExpert
Annual mean temp.
12,6°C
Annual rain
911mm
Warmest month
25,1°C
Coldest month
1,2°C
Mean alt.
374m
Min
287m
Max
431m
Std. dev.
49m
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

6,6

Org. C

39,3g/kg

Clay

31,5%

Sand

21,6%

Silt

46,9%

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

Dominant lithology: suGLiMaggregated to Haute-Garonne

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,5
Org. C
72,4g/kg
Clay
30,2%
Sand
21,8%
Silt
47,9%
5–15 cm
pH H₂O
6,6
Org. C
26,6g/kg
Clay
31,0%
Sand
21,1%
Silt
47,9%
15–30 cm
pH H₂O
6,6
Org. C
19,0g/kg
Clay
33,4%
Sand
21,9%
Silt
44,7%

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

Land cover

Forest34.2%
Crops38.2%
Built-up0.6%
Bare soil1.0%
Other (grassland, water…)26.0%

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

Hydrology2 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

1,9km

Basins crossed

2

Max stream order

1

Max drainage

5 814km²

Discharge in basins

0,9m³/s

Mean precip.

777mm/an

Mean T°

12,0°C

Moisture idx

-0,18

Max snow

2%

Mean runoff

299mm/an

Mean elev. (basins)

368m

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

Night light

0,4nW

Built-up

56,1%

Pesticides

44,6kg/km²

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

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.