Tweefontein Private Nature Reserve
IUCN Not ReportedNature Reserve · 1995
10 km²
Commune · ZAF
Westonaria
South Africa
CwbTemperate, dry winter, warm summer(98 %)
Species observed
628
Observations
21 264
Area
639,8km²
Ecological tissue
Sample of 24 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 Westonaria : 20 espèces reliées par 20 interactions GloBI sur 3 types (connectance 7.2%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
24
Interactions affichées
20
Connectance
0.072
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
628 distinct species · 21 264 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
15,9°C
Annual rain
676mm
Warmest m°
25,3°C
Coldest m°
2,7°C
Elevation: 1 590 m on average (min 1 474 m, max 1 716 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
15,9°C
Annual rain
676mm
Warmest month
25,3°C
Coldest month
2,7°C
Mean alt.
1 590m
Min
1 474m
Max
1 716m
Std. dev.
58m
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
6,1
Org. C
13,3g/kg
Clay
23,7%
Sand
66,3%
Silt
10,0%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to West Rand
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,1
Org. C
15,7g/kg
Clay
23,7%
Sand
66,0%
Silt
10,3%
5–15 cm
pH H₂O
6,1
Org. C
10,8g/kg
Clay
22,8%
Sand
67,4%
Silt
9,9%
15–30 cm
pH H₂O
6,1
Org. C
13,5g/kg
Clay
24,7%
Sand
65,5%
Silt
9,7%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest3.7%
Crops32.3%
Built-up1.3%
Bare soil3.6%
Other (grassland, water…)59.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology4 basins · 12 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
25,4km
Lake surface here
4,29km²
Basins crossed
4
Max stream order
2
Max drainage
2 261km²
Discharge in basins
0,6m³/s
Mean precip.
691mm/an
Mean T°
15,9°C
Moisture idx
-0,53
Mean runoff
27mm/an
Mean elev. (basins)
1 581m
Watersheds crossing here
Lakes (12, top by area)
- Lac 1419328area0,9 km²avg depth3.2 m
- Lac 1419348area0,6 km²avg depth3.6 m
- Lac 1419420area0,6 km²avg depth3.7 m
- Lac 1419310area0,4 km²avg depth6.1 m
- Lac 1419305area0,4 km²avg depth5.7 m
- Lac 1419390area0,3 km²avg depth3.6 m
- Lac 1419415area0,3 km²avg depth2.8 m
- Lac 1419396area0,2 km²avg depth4.4 m
- Lac 1419389area0,2 km²avg depth3.1 m
Rivers / streams (2, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
1,8nW
Built-up
124,6%
Pesticides
44,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN