Ontologia

County · USA

Alger

United States

DfbCold, no dry season, warm summer(100 %)

Species observed

4 258

Observations

204 893

Area

2 453,5km²

Ecological tissue

Sample of 35 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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Alger : 26 espèces reliées par 79 interactions GloBI sur 4 types (connectance 12.5%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
79
Connectance
0.125
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

4 258 distinct species · 204 893 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

204 893 obs · 62 cellules
Obs. / cellule
≥ 29 769
9 051–29 768
2 859–9 050
1 055–2 858
< 1 055

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

Climate

Mean T°

5,3°C

Annual rain

910mm

Warmest m°

23,3°C

Coldest m°

-12,6°C

Elevation: 262 m on average (min 110 m, max 332 m)

Bioclimatic detailsExpert
Annual mean temp.
5,3°C
Annual rain
910mm
Warmest month
23,3°C
Coldest month
-12,6°C
Mean alt.
262m
Min
110m
Max
332m
Std. dev.
30m
Köppen-Geiger (dominant)
DfbCold, no dry season, warm summer(100 %)Cold

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

Soil & lithology

pH H₂O

5,1

Org. C

53,1g/kg

Clay

9,2%

Sand

65,2%

Silt

25,6%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,0
Org. C
85,4g/kg
Clay
9,2%
Sand
64,5%
Silt
26,3%
5–15 cm
pH H₂O
5,1
Org. C
45,8g/kg
Clay
9,1%
Sand
64,8%
Silt
26,1%
15–30 cm
pH H₂O
5,2
Org. C
28,1g/kg
Clay
9,3%
Sand
66,4%
Silt
24,3%

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

Land cover

Forest78.3%
Crops2.0%
Built-up0.1%
Bare soil0.7%
Other (grassland, water…)19.0%

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

Hydrology16 basins · 48 lakes · 64 rivers

Hydrology metrics for this exact territory

Stream length here

541,6km

Lake surface here

59,65km²

Basins crossed

16

Max stream order

3

Max drainage

192 983km²

Discharge in basins

38,4m³/s

Mean precip.

822mm/an

Mean T°

4,8°C

Moisture idx

0,04

Max snow

39%

Mean runoff

501mm/an

Mean elev. (basins)

220m

Watersheds crossing here

7 more basins

Lakes (48, top by area)

39 more lakes

Rivers / streams (64, ord ≥ 4)

52 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,1nW

Built-up

6,4%

Pesticides

4,2kg/km²

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

Protected areas54

IUCN V · 36IUCN Not Assigned · 13IUCN IV · 2IUCN Ib · 2IUCN Ia · 1
Complete list

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN