Ontologia

Commune · FRA

Marciac

France

CfbTemperate, no dry season, warm summer(67 %)

Species observed

998

Observations

8 292

Area

21,1km²

Ecological tissue

Sample of 37 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 Marciac : 33 espèces + 4 bulles famille, 74 interactions GloBI documentées sur 5 types (connectance 11.1%, filtre Serrano α=0.2). Les 4 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
37
Interactions affichées
74
Connectance
0.111
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

998 distinct species · 8 292 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 292 obs · 1 cellules
Obs. / cellule
≥ 8 292
8 292–8 291
8 292–8 291
8 292–8 291
< 8 292

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

Climate

Mean T°

13,5°C

Annual rain

850mm

Warmest m°

26,0°C

Coldest m°

2,1°C

Elevation: 173 m on average (min 144 m, max 205 m)

Bioclimatic detailsExpert
Annual mean temp.
13,5°C
Annual rain
850mm
Warmest month
26,0°C
Coldest month
2,1°C
Mean alt.
173m
Min
144m
Max
205m
Std. dev.
17m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(67 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

6,2

Org. C

40,1g/kg

Clay

23,4%

Sand

25,0%

Silt

51,6%

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

Dominant lithology: suGLiMaggregated to Gers

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,2
Org. C
76,6g/kg
Clay
22,4%
Sand
25,0%
Silt
52,5%
5–15 cm
pH H₂O
6,2
Org. C
19,1g/kg
Clay
23,1%
Sand
24,7%
Silt
52,2%
15–30 cm
pH H₂O
6,2
Org. C
24,6g/kg
Clay
24,6%
Sand
25,1%
Silt
50,2%

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

Land cover

Forest13.8%
Crops56.3%
Built-up0.8%
Bare soil1.9%
Other (grassland, water…)27.3%

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

Hydrology1 basins · 1 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

11,1km

Lake surface here

0,25km²

Basins crossed

1

Max stream order

3

Max drainage

911km²

Discharge in basins

0,3m³/s

Mean precip.

837mm/an

Mean T°

11,6°C

Moisture idx

-0,12

Max snow

3%

Mean runoff

466mm/an

Mean elev. (basins)

352m

Watersheds crossing here

Lakes (1, top by area)

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

Human pressure

Pop. density

0hab/km²

Night light

0,8nW

Built-up

80,8%

Pesticides

46,1kg/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.