Ontologia

Region · tcd

Hadjer-Lamis

Chad

BShArid, steppe, hot(70 %)

Species observed

634

Observations

3 922

Area

30 440,1km²

Ecological tissue

Sample of 33 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 Hadjer-Lamis : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 2 types (connectance 4.5%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
25
Connectance
0.045
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

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

Species present

634 distinct species · 3 922 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

3 922 obs · 269 cellules
Obs. / cellule
≥ 115
33–114
15–32
7–14
< 7

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

Climate

Mean T°

28,7°C

Annual rain

449mm

Warmest m°

41,0°C

Coldest m°

15,9°C

Elevation: 297 m on average (min 280 m, max 427 m)

Bioclimatic detailsExpert
Annual mean temp.
28,7°C
Annual rain
449mm
Warmest month
41,0°C
Coldest month
15,9°C
Mean alt.
297m
Min
280m
Max
427m
Std. dev.
15m
Köppen-Geiger (dominant)
BShArid, steppe, hot(70 %)Arid

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

Soil & lithology

pH H₂O

7,2

Org. C

6,7g/kg

Clay

36,4%

Sand

38,1%

Silt

25,5%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,2
Org. C
7,2g/kg
Clay
34,6%
Sand
39,2%
Silt
26,2%
5–15 cm
pH H₂O
7,2
Org. C
6,1g/kg
Clay
35,9%
Sand
38,5%
Silt
25,6%
15–30 cm
pH H₂O
7,3
Org. C
6,9g/kg
Clay
38,8%
Sand
36,6%
Silt
24,7%

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

Land cover

Forest4.3%
Crops27.9%
Built-up0.1%
Bare soil3.6%
Other (grassland, water…)64.0%

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

Hydrology80 basins · 44 lakes · 13 rivers

Hydrology metrics for this exact territory

Stream length here

634,0km

Lake surface here

433,14km²

Basins crossed

80

Max stream order

8

Max drainage

609 864km²

Discharge in basins

1 934,2m³/s

Mean precip.

461mm/an

Mean T°

29,0°C

Moisture idx

-0,79

Mean runoff

28mm/an

Mean elev. (basins)

301m

Watersheds crossing here

71 more basins

Lakes (44, top by area)

35 more lakes

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

9,5%

Pesticides

0,1kg/km²

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

Protected areas2

IUCN Not Reported · 1IUCN IV · 1

Lac Tchad

IUCN IV

Wetland of International Importance (Ramsar Site) · 2008

2 153 km²

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

Sub-administrations8