Ontologia

Commune · ZAF

Randfontein

South Africa

CwbTemperate, dry winter, warm summer(98 %)

Species observed

783

Observations

36 498

Area

474,9km²

Ecological tissue

Sample of 27 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 Randfontein : 23 espèces reliées par 22 interactions GloBI sur 3 types (connectance 6.3%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
27
Interactions affichées
22
Connectance
0.063
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

783 distinct species · 36 498 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

36 498 obs · 12 cellules
Obs. / cellule
≥ 26 771
4 065–26 770
1 393–4 064
647–1 392
< 647

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

Climate

Mean T°

15,7°C

Annual rain

694mm

Warmest m°

24,9°C

Coldest m°

2,9°C

Elevation: 1 630 m on average (min 1 509 m, max 1 740 m)

Bioclimatic detailsExpert
Annual mean temp.
15,7°C
Annual rain
694mm
Warmest month
24,9°C
Coldest month
2,9°C
Mean alt.
1 630m
Min
1 509m
Max
1 740m
Std. dev.
57m
Köppen-Geiger (dominant)
CwbTemperate, dry winter, warm summer(98 %)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

14,1g/kg

Clay

23,2%

Sand

67,0%

Silt

9,8%

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

Dominant lithology: ssGLiMaggregated to West Rand

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,0
Org. C
16,1g/kg
Clay
23,1%
Sand
66,8%
Silt
10,1%
5–15 cm
pH H₂O
6,0
Org. C
10,5g/kg
Clay
22,3%
Sand
68,0%
Silt
9,7%
15–30 cm
pH H₂O
6,0
Org. C
15,8g/kg
Clay
24,1%
Sand
66,4%
Silt
9,5%

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

Land cover

Forest4.7%
Crops30.5%
Built-up2.5%
Bare soil3.4%
Other (grassland, water…)58.9%

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

Hydrology4 basins · 6 lakes · 0 rivers

Hydrology metrics for this exact territory

Lake surface here

2,26km²

Basins crossed

4

Max drainage

1 492km²

Discharge in basins

0,4m³/s

Mean precip.

698mm/an

Mean T°

16,0°C

Moisture idx

-0,52

Mean runoff

26mm/an

Mean elev. (basins)

1 577m

Watersheds crossing here

Lakes (6, top by area)

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

Human pressure

Pop. density

3hab/km²

Night light

2,9nW

Built-up

246,0%

Pesticides

40,2kg/km²

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