Ontologia

Region · tcd

Lac

Chad

BWhArid, desert, hot(100 %)

Species observed

377

Observations

1 744

Area

19 842,9km²

Ecological tissue

Sample of 30 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 : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 23 interactions GloBI sur 4 types (connectance 5.3%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
30
Interactions affichées
23
Connectance
0.053
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

377 distinct species · 1 744 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 744 obs · 138 cellules
Obs. / cellule
≥ 119
21–118
10–20
6–9
< 6

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

276mm

Warmest m°

40,6°C

Coldest m°

14,5°C

Elevation: 285 m on average (min 270 m, max 312 m)

Bioclimatic detailsExpert
Annual mean temp.
28,8°C
Annual rain
276mm
Warmest month
40,6°C
Coldest month
14,5°C
Mean alt.
285m
Min
270m
Max
312m
Std. dev.
8m
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

7,4

Org. C

8,5g/kg

Clay

33,6%

Sand

41,3%

Silt

25,1%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,3
Org. C
10,9g/kg
Clay
31,8%
Sand
42,4%
Silt
25,8%
5–15 cm
pH H₂O
7,4
Org. C
8,6g/kg
Clay
32,1%
Sand
42,3%
Silt
25,7%
15–30 cm
pH H₂O
7,4
Org. C
6,0g/kg
Clay
36,9%
Sand
39,2%
Silt
23,8%

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

Land cover

Forest4.5%
Crops18.5%
Built-up0.1%
Bare soil10.5%
Other (grassland, water…)66.4%

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

Hydrology64 basins · 50 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

74,5km

Lake surface here

9 867,45km²

Basins crossed

64

Max stream order

3

Max drainage

980 212km²

Discharge in basins

1 883,3m³/s

Mean precip.

263mm/an

Mean T°

27,8°C

Moisture idx

-0,88

Mean runoff

9mm/an

Mean elev. (basins)

294m

Watersheds crossing here

55 more basins

Lakes (50, top by area)

41 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

10,6%

Pesticides

0,0kg/km²

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

Protected areas3

IUCN IV · 2IUCN Not Reported · 1📍 Point sites · 1

Lac Tchad

IUCN IV

Wetland of International Importance (Ramsar Site) · 2001

3 386 km²

Lac Tchad

IUCN IV

Wetland of International Importance (Ramsar Site) · 2008

2 153 km²

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

Sub-administrations2