Ontologia

Delegation · TUN

Bir Mchergua

Tunisia

BShArid, steppe, hot(86 %)

Species observed

142

Observations

278

Area

667,8km²

Ecological tissue

Sample of 37 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 Bir Mchergua : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 42 interactions GloBI sur 4 types (connectance 6.0%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
42
Connectance
0.060
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

142 distinct species · 278 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

278 obs · 14 cellules
Obs. / cellule
≥ 95
48–94
20–47
8–19
< 8

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

Climate

Mean T°

18,5°C

Annual rain

463mm

Warmest m°

34,4°C

Coldest m°

5,8°C

Elevation: 174 m on average (min 53 m, max 435 m)

Bioclimatic detailsExpert
Annual mean temp.
18,5°C
Annual rain
463mm
Warmest month
34,4°C
Coldest month
5,8°C
Mean alt.
174m
Min
53m
Max
435m
Std. dev.
65m
Köppen-Geiger (dominant)
BShArid, steppe, hot(86 %)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

18,4g/kg

Clay

32,9%

Sand

31,4%

Silt

35,7%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,6
Org. C
27,8g/kg
Clay
32,6%
Sand
31,6%
Silt
35,9%
5–15 cm
pH H₂O
7,9
Org. C
15,9g/kg
Clay
33,0%
Sand
30,8%
Silt
36,2%
15–30 cm
pH H₂O
7,9
Org. C
11,4g/kg
Clay
33,1%
Sand
31,8%
Silt
35,1%

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

Land cover

Forest4.3%
Crops51.7%
Built-up0.5%
Bare soil5.9%
Other (grassland, water…)37.6%

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

Hydrology3 basins · 3 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

70,1km

Lake surface here

8,27km²

Basins crossed

3

Max stream order

4

Max drainage

23 172km²

Discharge in basins

5,4m³/s

Mean precip.

472mm/an

Mean T°

17,4°C

Moisture idx

-0,63

Mean runoff

92mm/an

Mean elev. (basins)

220m

Watersheds crossing here

Lakes (3, top by area)

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

Human pressure

Pop. density

0hab/km²

Night light

1,2nW

Built-up

51,3%

Pesticides

2,6kg/km²

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