Ontologia

Commune · DZA

Merahna

Algeria

CsaTemperate, dry summer, hot summer(100 %)

Species observed

3

Observations

4

Area

115,8km²

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

3 distinct species · 4 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 obs · 2 cellules
Obs. / cellule
≥ 3
3–2
3–2
3–2
< 3

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

Climate

Mean T°

15,6°C

Annual rain

615mm

Warmest m°

32,7°C

Coldest m°

1,7°C

Elevation: 793 m on average (min 570 m, max 935 m)

Bioclimatic detailsExpert
Annual mean temp.
15,6°C
Annual rain
615mm
Warmest month
32,7°C
Coldest month
1,7°C
Mean alt.
793m
Min
570m
Max
935m
Std. dev.
76m
Köppen-Geiger (dominant)
CsaTemperate, dry summer, hot summer(100 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

6,8

Org. C

23,9g/kg

Clay

37,0%

Sand

27,4%

Silt

35,7%

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

Dominant lithology: scGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,8
Org. C
38,0g/kg
Clay
37,4%
Sand
27,0%
Silt
35,5%
5–15 cm
pH H₂O
6,8
Org. C
19,4g/kg
Clay
37,8%
Sand
26,8%
Silt
35,4%
15–30 cm
pH H₂O
6,9
Org. C
14,2g/kg
Clay
35,6%
Sand
28,3%
Silt
36,1%

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

Land cover

Forest3.8%
Crops50.2%
Built-up0.6%
Bare soil6.7%
Other (grassland, water…)38.7%

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

Hydrology3 basins · 0 lakes · 5 rivers

Hydrology metrics for this exact territory

Stream length here

15,2km

Basins crossed

3

Max stream order

3

Max drainage

10 716km²

Discharge in basins

0,5m³/s

Mean precip.

676mm/an

Mean T°

15,2°C

Moisture idx

-0,48

Max snow

1%

Mean runoff

132mm/an

Mean elev. (basins)

643m

Watersheds crossing here

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

Human pressure

Pop. density

1hab/km²

Night light

1,0nW

Built-up

55,3%

Pesticides

17,7kg/km²

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