Ontologia

District · YEM

Usaylan

Yemen

BWhArid, desert, hot(100 %)

Species observed

8

Observations

8

Area

3 023,1km²

Partial data for this territory

Few observations recorded here. Real biodiversity is likely richer.

Ecological tissue

Not enough documented interactions to build a meaningful graph for this territory.

Species present

8 distinct species · 8 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 obs · 6 cellules
Obs. / cellule
≥ 3
3–2
1–2
1–0
< 1

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

Climate

Mean T°

26,7°C

Annual rain

57mm

Warmest m°

38,5°C

Coldest m°

11,0°C

Elevation: 995 m on average (min 883 m, max 1 879 m)

Bioclimatic detailsExpert
Annual mean temp.
26,7°C
Annual rain
57mm
Warmest month
38,5°C
Coldest month
11,0°C
Mean alt.
995m
Min
883m
Max
1 879m
Std. dev.
74m
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

8,2

Org. C

4,3g/kg

Clay

15,0%

Sand

55,0%

Silt

30,0%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
8,2
Org. C
4,8g/kg
Clay
13,9%
Sand
55,9%
Silt
30,2%
5–15 cm
pH H₂O
8,2
Org. C
3,9g/kg
Clay
15,0%
Sand
55,0%
Silt
30,0%
15–30 cm
pH H₂O
8,2
Org. C
4,1g/kg
Clay
16,2%
Sand
54,0%
Silt
29,8%

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

Land cover

Forest0.1%
Crops0.4%
Built-up0.0%
Bare soil98.3%
Other (grassland, water…)1.2%

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

Hydrology8 basins · 0 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

155,1km

Basins crossed

8

Max stream order

4

Max drainage

23 665km²

Discharge in basins

0,1m³/s

Mean precip.

85mm/an

Mean T°

22,1°C

Moisture idx

-0,95

Mean runoff

20mm/an

Mean elev. (basins)

1 020m

Watersheds crossing here

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

Human pressure

Pop. density

0hab/km²

Night light

0,2nW

Built-up

1,2%

Pesticides

0,0kg/km²

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