City · yem
San`a'
Yemen
Species observed
538
Observations
2 341
Area
11 912,9km²
Ecological tissue
Sample of 34 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 San`a' : 27 espèces reliées par 45 interactions GloBI sur 2 types (connectance 7.6%, filtre Serrano α=0.2). 8 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
538 distinct species · 2 341 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
19,6°C
Annual rain
286mm
Warmest m°
28,9°C
Coldest m°
8,3°C
Elevation: 2 081 m on average (min 462 m, max 3 449 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
7,9
Org. C
14,7g/kg
Clay
24,1%
Sand
42,8%
Silt
33,1%
Average over 0-30 cm. Per-depth details in expert panel.
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)
Hydrology33 basins · 0 lakes · 3 rivers
Hydrology metrics for this exact territory
Stream length here
25,5km
Basins crossed
33
Max stream order
4
Max drainage
12 859km²
Discharge in basins
10,3m³/s
Mean precip.
245mm/an
Mean T°
17,8°C
Moisture idx
-0,85
Mean runoff
18mm/an
Mean elev. (basins)
1 995m
Watersheds crossing here
- Basin #05460sub-area1 906,5 km²overlap1872.45 km²16%
- Bassin de وادي الحفّاءsub-area3 388,6 km²overlap922.31 km²8%
- Bassin de وادي عطّافsub-area981,1 km²overlap889.51 km²7%
- Basin #04170sub-area684,8 km²overlap682.33 km²6%
- Bassin de وادي عطّافsub-area2 124,5 km²overlap640.72 km²5%
- Basin #01610sub-area672 km²overlap632.58 km²5%
- Basin #05350sub-area782,4 km²overlap610.46 km²5%
- Basin #02950sub-area693,7 km²overlap586.27 km²5%
- Basin #05960sub-area950,2 km²overlap582.22 km²5%
24 more basinssorted by overlap
- Basin #05770sub-area2 336,3 km²overlap483.13 km²4%
- Bassin de السايلةsub-area422,7 km²overlap417.96 km²4%
- Bassin de وادي نخلانsub-area1 090,5 km²overlap392.05 km²3%
- Basin #05300sub-area312 km²overlap309.29 km²3%
- Basin #99240sub-area1 244,3 km²overlap276.34 km²2%
- Basin #06280sub-area1 061,8 km²overlap268.97 km²2%
- Basin #04140sub-area641,9 km²overlap268.69 km²2%
- Basin #99760sub-area1 795,1 km²overlap259.20 km²2%
- Basin #02510sub-area295,3 km²overlap237.24 km²2%
- Basin #04470sub-area281,8 km²overlap231.19 km²2%
- Bassin de السايلةsub-area234,8 km²overlap225.38 km²2%
- Basin #01560sub-area210,1 km²overlap209.35 km²2%
- Basin #02540sub-area282,6 km²overlap208.74 km²2%
- Bassin de السايلةsub-area302,4 km²overlap170.12 km²1%
- Basin #05790sub-area2 488,1 km²overlap139.26 km²1%
- Basin #98010sub-area977,8 km²overlap128.36 km²1%
- Bassin de وادي يبرsub-area556,7 km²overlap88.47 km²1%
- Basin #04410sub-area145,6 km²overlap77.17 km²1%
- Basin #05550sub-area113 km²overlap44.19 km²0%
- Basin #80920sub-area2 251,8 km²overlap27.84 km²0%
- Basin #04130sub-area33,5 km²overlap26.80 km²0%
- Bassin de وادي اللبsub-area2 737,8 km²overlap4.30 km²0%
- Basin #05970sub-area413,9 km²overlap0.00 km²0%
- Basin #04120sub-area213,2 km²overlap0.00 km²0%
Rivers / streams (3, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
0,1nW
Built-up
17,2%
Pesticides
0,2kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)