Ontologia

Delegation · TUN

Hamma

Tunisia

BWhArid, desert, hot(100 %)

Species observed

534

Observations

1 637

Area

2 694,5km²

Ecological tissue

Sample of 33 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 Hamma : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 5 types (connectance 5.9%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
35
Connectance
0.059
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

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

Species present

534 distinct species · 1 637 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 637 obs · 33 cellules
Obs. / cellule
≥ 970
77–969
25–76
8–24
< 8

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

Climate

Mean T°

20,6°C

Annual rain

143mm

Warmest m°

36,1°C

Coldest m°

5,6°C

Elevation: 99 m on average (min 21 m, max 412 m)

Bioclimatic detailsExpert
Annual mean temp.
20,6°C
Annual rain
143mm
Warmest month
36,1°C
Coldest month
5,6°C
Mean alt.
99m
Min
21m
Max
412m
Std. dev.
70m
Köppen-Geiger (dominant)
BWhArid, desert, hot(100 %)Arid

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

Soil & lithology

pH H₂O

8,2

Org. C

6,5g/kg

Clay

20,2%

Sand

52,0%

Silt

27,8%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
8,2
Org. C
8,3g/kg
Clay
20,0%
Sand
52,2%
Silt
27,8%
5–15 cm
pH H₂O
8,2
Org. C
6,2g/kg
Clay
19,7%
Sand
52,4%
Silt
27,9%
15–30 cm
pH H₂O
8,3
Org. C
5,1g/kg
Clay
21,0%
Sand
51,3%
Silt
27,7%

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

Land cover

Forest0.7%
Crops1.9%
Built-up0.2%
Bare soil86.7%
Other (grassland, water…)10.6%

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

Hydrology11 basins · 0 lakes · 8 rivers

Hydrology metrics for this exact territory

Stream length here

120,7km

Basins crossed

11

Max stream order

4

Max drainage

2 980km²

Discharge in basins

6,0m³/s

Mean precip.

148mm/an

Mean T°

19,8°C

Moisture idx

-0,90

Mean runoff

69mm/an

Mean elev. (basins)

111m

Watersheds crossing here

2 more basins

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

Human pressure

Pop. density

0hab/km²

Night light

0,2nW

Built-up

16,7%

Pesticides

0,0kg/km²

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