Ontologia

Department · TCD

Biltine

Chad

BWhArid, desert, hot(100 %)

Species observed

324

Observations

1 975

Area

24 462,7km²

Ecological tissue

Sample of 26 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 Biltine : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 2 types (connectance 8.9%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
26
Interactions affichées
29
Connectance
0.089
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

324 distinct species · 1 975 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 975 obs · 142 cellules
Obs. / cellule
≥ 199
32–198
14–31
4–13
< 4

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

201mm

Warmest m°

39,9°C

Coldest m°

14,5°C

Elevation: 504 m on average (min 393 m, max 963 m)

Bioclimatic detailsExpert
Annual mean temp.
28,2°C
Annual rain
201mm
Warmest month
39,9°C
Coldest month
14,5°C
Mean alt.
504m
Min
393m
Max
963m
Std. dev.
111m
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

7,9

Org. C

4,1g/kg

Clay

29,2%

Sand

49,1%

Silt

21,7%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,9
Org. C
4,8g/kg
Clay
29,0%
Sand
49,5%
Silt
21,5%
5–15 cm
pH H₂O
7,9
Org. C
4,1g/kg
Clay
29,8%
Sand
48,6%
Silt
21,6%
15–30 cm
pH H₂O
7,9
Org. C
3,5g/kg
Clay
28,8%
Sand
49,2%
Silt
22,0%

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

Land cover

Forest1.1%
Crops7.7%
Built-up0.0%
Bare soil32.7%
Other (grassland, water…)58.6%

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

Hydrology55 basins · 0 lakes · 16 rivers

Hydrology metrics for this exact territory

Stream length here

437,8km

Basins crossed

55

Max stream order

4

Max drainage

11 638km²

Discharge in basins

12,1m³/s

Mean precip.

203mm/an

Mean T°

28,9°C

Moisture idx

-0,91

Mean runoff

6mm/an

Mean elev. (basins)

499m

Watersheds crossing here

46 more basins

Rivers / streams (16, ord ≥ 4)

4 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

3,5%

Pesticides

0,0kg/km²

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

Protected areas1

IUCN IV · 1

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

Sub-administrations7