Ontologia

Commune · TCD

Ouled-Djema

Chad

BWhArid, desert, hot(100 %)

Species observed

83

Observations

155

Area

790,7km²

Ecological tissue

Sample of 8 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 Ouled-Djema : 7 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 5 interactions GloBI sur 2 types (connectance 17.9%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
8
Interactions affichées
5
Connectance
0.179
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

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

Species present

83 distinct species · 155 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

155 obs · 8 cellules
Obs. / cellule
≥ 28
28–27
24–27
21–23
< 21

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

Climate

Mean T°

28,2°C

Annual rain

300mm

Warmest m°

39,4°C

Coldest m°

15,7°C

Elevation: 558 m on average (min 485 m, max 745 m)

Bioclimatic detailsExpert
Annual mean temp.
28,2°C
Annual rain
300mm
Warmest month
39,4°C
Coldest month
15,7°C
Mean alt.
558m
Min
485m
Max
745m
Std. dev.
47m
Köppen-Geiger (dominant)
BWhArid, desert, hot(100 %)Arid

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

Soil & lithology

pH H₂O

7,6

Org. C

4,7g/kg

Clay

25,4%

Sand

55,2%

Silt

19,4%

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

Dominant lithology: ssGLiMaggregated to Biltine

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,6
Org. C
5,5g/kg
Clay
25,9%
Sand
54,9%
Silt
19,1%
5–15 cm
pH H₂O
7,6
Org. C
4,5g/kg
Clay
25,4%
Sand
55,4%
Silt
19,2%
15–30 cm
pH H₂O
7,7
Org. C
4,2g/kg
Clay
24,9%
Sand
55,3%
Silt
19,8%

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

Land cover

Forest1.5%
Crops18.6%
Built-up0.3%
Bare soil18.3%
Other (grassland, water…)61.2%

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

Hydrology5 basins · 0 lakes · 0 rivers

Hydrology metrics for this exact territory

Basins crossed

5

Max drainage

6 154km²

Discharge in basins

0,1m³/s

Mean precip.

280mm/an

Mean T°

28,5°C

Moisture idx

-0,87

Mean runoff

7mm/an

Mean elev. (basins)

579m

Watersheds crossing here

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

Human pressure

Pop. density

1hab/km²

Night light

0,0nW

Built-up

32,7%

Pesticides

0,0kg/km²

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