Chréa
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve · 2002
412 km²
Commune · DZA
Algeria
Species observed
36
Observations
104
Area
27,4km²
Sample of 12 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).
Tissu écologique de Soumaa : 12 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 9 interactions GloBI sur 2 types (connectance 13.6%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
36 distinct species · 104 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Mean T°
17,5°C
Annual rain
626mm
Warmest m°
31,8°C
Coldest m°
6,0°C
Elevation: 292 m on average (min 65 m, max 1 279 m)
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
pH H₂O
6,6
Org. C
24,9g/kg
Clay
31,3%
Sand
34,5%
Silt
34,1%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiM
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology metrics for this exact territory
Basins crossed
1
Max drainage
2 039km²
Discharge in basins
0,2m³/s
Mean precip.
710mm/an
Mean T°
16,9°C
Moisture idx
-0,34
Max snow
1%
Mean runoff
167mm/an
Mean elev. (basins)
390m
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Pop. density
13hab/km²
Night light
16,8nW
Built-up
598,2%
Pesticides
22,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN