Ontologia

Commune · FRA

Seissan

France

CfbTemperate, no dry season, warm summer(64 %)

Species observed

509

Observations

2 002

Area

19km²

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 Seissan : 28 espèces + 7 bulles famille, 72 interactions GloBI documentées sur 5 types (connectance 12.1%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
35
Interactions affichées
72
Connectance
0.121
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

509 distinct species · 2 002 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 011 obs · 12 cellules · 1849–2025
Obs. / cellule
≥ 554
470–553
234–469
78–233
< 78

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

Climate

Mean T°

13,4°C

Annual rain

779mm

Warmest m°

26,1°C

Coldest m°

2,0°C

Elevation: 212 m on average (min 182 m, max 243 m)

Bioclimatic detailsExpert
Annual mean temp.
13,4°C
Annual rain
779mm
Warmest month
26,1°C
Coldest month
2,0°C
Mean alt.
212m
Min
182m
Max
243m
Std. dev.
15m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(64 %)Temperate

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

Soil & lithology

pH H₂O

6,8

Org. C

37,0g/kg

Clay

28,7%

Sand

22,0%

Silt

49,3%

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
6,8
Org. C
65,3g/kg
Clay
28,0%
Sand
21,7%
Silt
50,2%
5–15 cm
pH H₂O
6,9
Org. C
22,6g/kg
Clay
26,8%
Sand
21,6%
Silt
51,5%
15–30 cm
pH H₂O
6,8
Org. C
23,0g/kg
Clay
31,4%
Sand
22,6%
Silt
46,1%

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

Land cover

Forest17.6%
Crops50.3%
Built-up0.9%
Bare soil1.3%
Other (grassland, water…)29.9%

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

Hydrology1 basins · 0 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

3,9km

Basins crossed

1

Max stream order

2

Max drainage

1 239km²

Discharge in basins

0,2m³/s

Mean precip.

774mm/an

Mean T°

12,2°C

Moisture idx

-0,21

Max snow

1%

Mean runoff

275mm/an

Mean elev. (basins)

195m

Watersheds crossing here

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

Human pressure

Pop. density

0hab/km²

Night light

0,2nW

Built-up

93,8%

Pesticides

45,3kg/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.