Ontologia

Region · mrt

Assaba

Mauritania

BWhArid, desert, hot(95 %)

Species observed

355

Observations

3 284

Area

35 878,3km²

Ecological tissue

Graphe en cours d’indexation

Calcul du tissu écologique de cette entité.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 2s).

Species present

355 distinct species · 3 284 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

3 284 obs · 334 cellules
Obs. / cellule
≥ 186
19–185
5–18
2–4
< 2

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

Climate

Mean T°

30,2°C

Annual rain

281mm

Warmest m°

41,1°C

Coldest m°

16,2°C

Elevation: 176 m on average (min 24 m, max 581 m)

Bioclimatic detailsExpert
Annual mean temp.
30,2°C
Annual rain
281mm
Warmest month
41,1°C
Coldest month
16,2°C
Mean alt.
176m
Min
24m
Max
581m
Std. dev.
86m
Köppen-Geiger (dominant)
BWhArid, desert, hot(95 %)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

4,4g/kg

Clay

19,5%

Sand

60,3%

Silt

20,2%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,4
Org. C
5,5g/kg
Clay
19,0%
Sand
60,4%
Silt
20,6%
5–15 cm
pH H₂O
7,4
Org. C
4,2g/kg
Clay
19,2%
Sand
60,6%
Silt
20,2%
15–30 cm
pH H₂O
7,4
Org. C
3,5g/kg
Clay
20,3%
Sand
60,0%
Silt
19,7%

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

Land cover

Forest1.3%
Crops8.8%
Built-up0.1%
Bare soil32.9%
Other (grassland, water…)56.9%

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

Hydrology79 basins · 8 lakes · 73 rivers

Hydrology metrics for this exact territory

Stream length here

1 578,4km

Lake surface here

4,68km²

Basins crossed

79

Max stream order

6

Max drainage

91 118km²

Discharge in basins

75,7m³/s

Mean precip.

233mm/an

Mean T°

29,0°C

Moisture idx

-0,89

Mean runoff

47mm/an

Mean elev. (basins)

181m

Watersheds crossing here

70 more basins

Lakes (8, top by area)

Rivers / streams (73, ord ≥ 4)

61 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

4,6%

Pesticides

0,1kg/km²

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

Sub-administrations5