Ontologia

Department · TCD

Lac Léré

Chad

AwTropical, savannah(92 %)

Species observed

301

Observations

738

Area

4 399,3km²

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 Lac Léré : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 4 types (connectance 7.7%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
43
Connectance
0.077
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

301 distinct species · 738 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

738 obs · 56 cellules
Obs. / cellule
≥ 138
42–137
12–41
2–11
< 2

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

Climate

Mean T°

28,0°C

Annual rain

854mm

Warmest m°

39,5°C

Coldest m°

18,7°C

Elevation: 330 m on average (min 226 m, max 435 m)

Bioclimatic detailsExpert
Annual mean temp.
28,0°C
Annual rain
854mm
Warmest month
39,5°C
Coldest month
18,7°C
Mean alt.
330m
Min
226m
Max
435m
Std. dev.
42m
Köppen-Geiger (dominant)
AwTropical, savannah(92 %)Tropical

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

8,6g/kg

Clay

24,7%

Sand

55,5%

Silt

19,7%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,7
Org. C
11,8g/kg
Clay
21,1%
Sand
58,7%
Silt
20,2%
5–15 cm
pH H₂O
6,7
Org. C
8,8g/kg
Clay
24,4%
Sand
55,7%
Silt
19,9%
15–30 cm
pH H₂O
6,7
Org. C
5,3g/kg
Clay
28,7%
Sand
52,2%
Silt
19,0%

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

Land cover

Forest7.5%
Crops36.2%
Built-up0.2%
Bare soil0.4%
Other (grassland, water…)55.6%

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

Hydrology12 basins · 3 lakes · 23 rivers

Hydrology metrics for this exact territory

Stream length here

682,4km

Lake surface here

50,67km²

Basins crossed

12

Max stream order

5

Max drainage

19 138km²

Discharge in basins

158,5m³/s

Mean precip.

858mm/an

Mean T°

27,8°C

Moisture idx

-0,56

Mean runoff

147mm/an

Mean elev. (basins)

341m

Watersheds crossing here

3 more basins

Lakes (3, top by area)

Rivers / streams (23, ord ≥ 4)

11 more river segments

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

Human pressure

Pop. density

1hab/km²

Night light

0,0nW

Built-up

16,4%

Pesticides

0,3kg/km²

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

Protected areas2

IUCN IV · 1IUCN Not Reported · 1

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

Sub-administrations5