Ontologia

Commune · DZA

Djerma

Algeria

BSkArid, steppe, cold(100 %)

Species observed

73

Observations

116

Area

99,8km²

Ecological tissue

Sample of 29 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 Djerma : 25 espèces reliées par 31 interactions GloBI sur 4 types (connectance 7.6%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
31
Connectance
0.076
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

73 distinct species · 116 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

116 obs · 3 cellules
Obs. / cellule
≥ 54
54–53
54–53
47–53
< 47

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

Climate

Mean T°

15,8°C

Annual rain

314mm

Warmest m°

33,5°C

Coldest m°

1,1°C

Elevation: 916 m on average (min 815 m, max 1 289 m)

Bioclimatic detailsExpert
Annual mean temp.
15,8°C
Annual rain
314mm
Warmest month
33,5°C
Coldest month
1,1°C
Mean alt.
916m
Min
815m
Max
1 289m
Std. dev.
100m
Köppen-Geiger (dominant)
BSkArid, steppe, cold(100 %)Arid

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

Soil & lithology

pH H₂O

7,8

Org. C

13,8g/kg

Clay

23,5%

Sand

40,5%

Silt

36,0%

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

Dominant lithology: scGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,7
Org. C
19,1g/kg
Clay
21,9%
Sand
41,0%
Silt
37,1%
5–15 cm
pH H₂O
7,9
Org. C
11,8g/kg
Clay
22,8%
Sand
41,0%
Silt
36,2%
15–30 cm
pH H₂O
7,9
Org. C
10,5g/kg
Clay
25,8%
Sand
39,5%
Silt
34,7%

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

Land cover

Forest8.4%
Crops30.6%
Built-up0.6%
Bare soil8.5%
Other (grassland, water…)51.9%

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

Hydrology1 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

0,2km

Basins crossed

1

Max stream order

2

Max drainage

2 582km²

Mean precip.

382mm/an

Mean T°

13,9°C

Moisture idx

-0,69

Mean runoff

24mm/an

Mean elev. (basins)

960m

Watersheds crossing here

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

Human pressure

Pop. density

0hab/km²

Night light

2,8nW

Built-up

60,8%

Pesticides

18,0kg/km²

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

Protected areas2

IUCN Not Applicable · 1IUCN II · 1

Belezma

IUCN Not Applicable

UNESCO-MAB Biosphere Reserve · 2015

660 km²

Belezma

IUCN II

National Park · 1984

272 km²

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