Ontologia

Department · MRT

Magta-Lahjar

Mauritania

BWhArid, desert, hot(100 %)

Species observed

49

Observations

2 859

Area

13 781,3km²

Ecological tissue

Sample of 9 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 Magta-Lahjar : 9 espèces + 0 bulles famille, 5 interactions GloBI documentées sur 2 types (connectance 13.9%, filtre Serrano α=0.2).

Espèces affichées
9
Interactions affichées
5
Connectance
0.139
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

49 distinct species · 2 859 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 859 obs · 119 cellules
Obs. / cellule
≥ 795
18–794
4–17
2–3
< 2

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

Climate

Mean T°

30,1°C

Annual rain

150mm

Warmest m°

41,0°C

Coldest m°

15,6°C

Elevation: 90 m on average (min 34 m, max 223 m)

Bioclimatic detailsExpert
Annual mean temp.
30,1°C
Annual rain
150mm
Warmest month
41,0°C
Coldest month
15,6°C
Mean alt.
90m
Min
34m
Max
223m
Std. dev.
24m
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

7,8

Org. C

3,7g/kg

Clay

27,1%

Sand

53,0%

Silt

19,9%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,7
Org. C
4,7g/kg
Clay
26,9%
Sand
52,8%
Silt
20,3%
5–15 cm
pH H₂O
7,8
Org. C
3,6g/kg
Clay
26,6%
Sand
53,3%
Silt
20,1%
15–30 cm
pH H₂O
7,8
Org. C
2,8g/kg
Clay
27,8%
Sand
52,9%
Silt
19,3%

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

Land cover

Forest0.6%
Crops0.4%
Built-up0.0%
Bare soil73.4%
Other (grassland, water…)25.6%

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

Hydrology33 basins · 0 lakes · 13 rivers

Hydrology metrics for this exact territory

Stream length here

240,2km

Basins crossed

33

Max stream order

4

Max drainage

56 586km²

Discharge in basins

31,5m³/s

Mean precip.

147mm/an

Mean T°

29,4°C

Moisture idx

-0,93

Mean runoff

36mm/an

Mean elev. (basins)

94m

Watersheds crossing here

24 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

3,0%

Pesticides

0,0kg/km²

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