Ontologia

Department · MRT

Atar

Mauritania

BWhArid, desert, hot(100 %)

Species observed

370

Observations

2 759

Area

25 419,3km²

Ecological tissue

Sample of 28 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 Atar : 21 espèces reliées par 33 interactions GloBI sur 2 types (connectance 8.7%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
28
Interactions affichées
33
Connectance
0.087
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

370 distinct species · 2 759 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 759 obs · 248 cellules
Obs. / cellule
≥ 156
21–155
6–20
2–5
< 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

50mm

Warmest m°

40,9°C

Coldest m°

12,5°C

Elevation: 219 m on average (min 82 m, max 748 m)

Bioclimatic detailsExpert
Annual mean temp.
28,0°C
Annual rain
50mm
Warmest month
40,9°C
Coldest month
12,5°C
Mean alt.
219m
Min
82m
Max
748m
Std. dev.
103m
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

8,1

Org. C

3,7g/kg

Clay

16,7%

Sand

59,0%

Silt

24,3%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
8,1
Org. C
4,7g/kg
Clay
16,3%
Sand
59,3%
Silt
24,4%
5–15 cm
pH H₂O
8,1
Org. C
3,3g/kg
Clay
16,8%
Sand
58,7%
Silt
24,6%
15–30 cm
pH H₂O
8,1
Org. C
3,2g/kg
Clay
17,0%
Sand
58,9%
Silt
24,1%

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

Land cover

Forest0.0%
Crops0.0%
Built-up0.0%
Bare soil98.6%
Other (grassland, water…)1.4%

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

Hydrology53 basins · 0 lakes · 11 rivers

Hydrology metrics for this exact territory

Stream length here

311,8km

Basins crossed

53

Max stream order

4

Max drainage

12 216km²

Discharge in basins

15,2m³/s

Mean precip.

60mm/an

Mean T°

27,3°C

Moisture idx

-0,97

Mean runoff

8mm/an

Mean elev. (basins)

222m

Watersheds crossing here

44 more basins

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

1,4%

Pesticides

0,0kg/km²

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