Ontologia

Commune · ZAF

City of Johannesburg

South Africa

CwbTemperate, dry winter, warm summer(94 %)

Species observed

5 555

Observations

1 649 549

Area

1 645km²

Ecological tissue

Sample of 26 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 City of Johannesburg : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 18 interactions GloBI sur 3 types (connectance 5.5%, filtre Serrano α=0.2).

Espèces affichées
26
Interactions affichées
18
Connectance
0.055
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

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

Species present

5 555 distinct species · 1 649 549 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 649 549 obs · 41 cellules
Obs. / cellule
≥ 277 330
128 082–277 329
28 550–128 081
9 273–28 549
< 9 273

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

Climate

Mean T°

16,0°C

Annual rain

712mm

Warmest m°

25,1°C

Coldest m°

2,9°C

Elevation: 1 584 m on average (min 1 285 m, max 1 764 m)

Bioclimatic detailsExpert
Annual mean temp.
16,0°C
Annual rain
712mm
Warmest month
25,1°C
Coldest month
2,9°C
Mean alt.
1 584m
Min
1 285m
Max
1 764m
Std. dev.
97m
Köppen-Geiger (dominant)
CwbTemperate, dry winter, warm summer(94 %)Temperate

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

Soil & lithology

pH H₂O

6,0

Org. C

15,3g/kg

Clay

22,9%

Sand

64,8%

Silt

12,4%

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

Dominant lithology: mtGLiMaggregated to City of Johannesburg

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,0
Org. C
18,5g/kg
Clay
22,8%
Sand
64,5%
Silt
12,7%
5–15 cm
pH H₂O
6,0
Org. C
13,0g/kg
Clay
21,9%
Sand
65,7%
Silt
12,4%
15–30 cm
pH H₂O
6,0
Org. C
14,5g/kg
Clay
23,9%
Sand
64,1%
Silt
12,0%

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

Land cover

Forest3.5%
Crops11.2%
Built-up15.1%
Bare soil2.5%
Other (grassland, water…)67.7%

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

Hydrology5 basins · 19 lakes · 21 rivers

Hydrology metrics for this exact territory

Stream length here

249,3km

Lake surface here

7,78km²

Basins crossed

5

Max stream order

3

Max drainage

2 261km²

Discharge in basins

1,8m³/s

Mean precip.

708mm/an

Mean T°

16,2°C

Moisture idx

-0,51

Mean runoff

34mm/an

Mean elev. (basins)

1 559m

Watersheds crossing here

Lakes (19, top by area)

10 more lakes

Rivers / streams (21, ord ≥ 4)

9 more river segments

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

Human pressure

Pop. density

28hab/km²

Night light

15,6nW

Built-up

1 510,9%

Pesticides

25,5kg/km²

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

Protected areas7

IUCN Not Reported · 7
Complete list

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

Sub-administrations70