Ontologia

Region · tcd

Ville de N'Djamena

Chad

BShArid, steppe, hot(100 %)

Species observed

604

Observations

4 583

Area

396,8km²

Ecological tissue

Sample of 38 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 Ville de N'Djamena : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 6.3%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
44
Connectance
0.063
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

604 distinct species · 4 583 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 583 obs · 10 cellules
Obs. / cellule
≥ 2 251
2 251–2 250
850–2 250
52–849
< 52

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

Climate

Mean T°

28,8°C

Annual rain

485mm

Warmest m°

41,3°C

Coldest m°

16,3°C

Elevation: 293 m on average (min 290 m, max 296 m)

Bioclimatic detailsExpert
Annual mean temp.
28,8°C
Annual rain
485mm
Warmest month
41,3°C
Coldest month
16,3°C
Mean alt.
293m
Min
290m
Max
296m
Std. dev.
1m
Köppen-Geiger (dominant)
BShArid, steppe, hot(100 %)Arid

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

Soil & lithology

pH H₂O

6,7

Org. C

7,3g/kg

Clay

41,4%

Sand

31,8%

Silt

26,9%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,7
Org. C
8,4g/kg
Clay
39,4%
Sand
32,7%
Silt
27,9%
5–15 cm
pH H₂O
6,6
Org. C
7,1g/kg
Clay
40,9%
Sand
32,3%
Silt
26,9%
15–30 cm
pH H₂O
6,8
Org. C
6,3g/kg
Clay
43,7%
Sand
30,5%
Silt
25,8%

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

Land cover

Forest2.5%
Crops19.8%
Built-up11.1%
Bare soil3.2%
Other (grassland, water…)63.4%

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

Hydrology6 basins · 2 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

58,3km

Lake surface here

0,33km²

Basins crossed

6

Max stream order

8

Max drainage

604 168km²

Discharge in basins

902,2m³/s

Mean precip.

480mm/an

Mean T°

28,1°C

Moisture idx

-0,78

Mean runoff

28mm/an

Mean elev. (basins)

295m

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

Human pressure

Pop. density

31hab/km²

Night light

5,1nW

Built-up

1 105,2%

Pesticides

0,2kg/km²

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

Protected areas2

IUCN Not Reported · 1IUCN II · 1

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN

Sub-administrations1