Governorate · SAU
Najran
Saudi Arabia
Species observed
452
Observations
647
Area
3 190,6km²
Ecological tissue
Sample of 32 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).
Indicateurs du tissu écologique
Tissu écologique de Najran : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 4 types (connectance 6.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
452 distinct species · 647 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
23,6°C
Annual rain
87mm
Warmest m°
35,5°C
Coldest m°
7,8°C
Elevation: 1 511 m on average (min 1 130 m, max 2 152 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
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
6,1g/kg
Clay
20,2%
Sand
46,0%
Silt
33,9%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: mtGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology9 basins · 0 lakes · 17 rivers
Hydrology metrics for this exact territory
Stream length here
396,8km
Basins crossed
9
Max stream order
5
Max drainage
7 944km²
Discharge in basins
6,8m³/s
Mean precip.
152mm/an
Mean T°
21,7°C
Moisture idx
-0,92
Mean runoff
37mm/an
Mean elev. (basins)
1 552m
Watersheds crossing here
- Bassin de وادي نجرانsub-area1 204,4 km²overlap995.79 km²31%
- Bassin de وادي حبوناsub-area1 393,3 km²overlap656.66 km²21%
- Bassin de وادي حصنsub-area2 658 km²overlap636.42 km²20%
- Bassin de وادي حبوناsub-area830 km²overlap534.43 km²17%
- Bassin de وادي كهلانsub-area2 967,5 km²overlap151.86 km²5%
- Bassin de وادي قطنsub-area1 525,9 km²overlap113.66 km²4%
- Bassin de وادي صلةsub-area1 035,1 km²overlap80.05 km²3%
- Bassin de وادي نجرانsub-area1 313,2 km²overlap19.51 km²1%
- Bassin de وادي نشورsub-area1 872,6 km²overlap2.24 km²0%
Rivers / streams (17, ord ≥ 4)
- وادي نجرانord 5len here121.72 km47%total259 km
- وادي حصنord 3len here67.31 km72%total93 km
- وادي حبوناord 4len here48.77 km26%total190 km
- وادي قطنord 4len here23.44 km17%total139 km
- وادي عرفانord 2len here20.25 km55%total37 km
- وادي الاثايبهord 2len here16.38 km100%total16 km
- الشعبينord 2len here15.28 km100%total15 km
- شعيب ظلمord 3len here13.42 km38%total36 km
- شعيب القمراءord 2len here12.83 km100%total13 km
- وادي ذي حبابord 1len here12.81 km100%total13 km
- وادي غربord 2len here11.13 km40%total28 km
- شعيب برانord 2len here10.13 km100%total10 km
5 more river segmentssorted by Strahler order + length
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
8,8nW
Built-up
117,4%
Pesticides
37,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)