Ontologia

Commune · TCD

Birak

Chad

BWhArid, desert, hot(60 %)

Species observed

7

Observations

43

Area

320,1km²

Partial data for this territory

Few observations recorded here. Real biodiversity is likely richer.

Ecological tissue

Sample of 3 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 Birak : 3 espèces reliées par 2 interactions GloBI sur 1 type (connectance 66.7%, filtre Serrano α=0.2).

Espèces affichées
3
Interactions affichées
2
Connectance
0.667
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

7 distinct species · 43 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

43 obs · 4 cellules
Obs. / cellule
≥ 32
32–31
5–31
5–4
< 5

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

Climate

Mean T°

24,2°C

Annual rain

328mm

Warmest m°

36,2°C

Coldest m°

10,2°C

Elevation: 987 m on average (min 939 m, max 1 043 m)

Bioclimatic detailsExpert
Annual mean temp.
24,2°C
Annual rain
328mm
Warmest month
36,2°C
Coldest month
10,2°C
Mean alt.
987m
Min
939m
Max
1 043m
Std. dev.
18m
Köppen-Geiger (dominant)
BWhArid, desert, hot(60 %)Arid

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

Soil & lithology

pH H₂O

7,4

Org. C

6,5g/kg

Clay

22,7%

Sand

53,1%

Silt

24,2%

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

Dominant lithology: suGLiMaggregated to Dar Tama

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,3
Org. C
6,3g/kg
Clay
20,6%
Sand
55,3%
Silt
24,1%
5–15 cm
pH H₂O
7,3
Org. C
5,6g/kg
Clay
22,4%
Sand
54,1%
Silt
23,6%
15–30 cm
pH H₂O
7,4
Org. C
7,6g/kg
Clay
25,3%
Sand
49,9%
Silt
24,8%

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

Land cover

Forest1.8%
Crops25.7%
Built-up0.2%
Bare soil2.3%
Other (grassland, water…)70.0%

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

Hydrology2 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

25,1km

Basins crossed

2

Max stream order

3

Max drainage

1 791km²

Discharge in basins

0,1m³/s

Mean precip.

369mm/an

Mean T°

24,9°C

Moisture idx

-0,82

Mean runoff

12mm/an

Mean elev. (basins)

993m

Watersheds crossing here

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

Human pressure

Pop. density

1hab/km²

Built-up

20,6%

Pesticides

0,2kg/km²

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