Vaaldam Nature Reserve
IUCN Not ReportedNature Reserve · 1954
253 km²
District Municipality · ZAF
Sedibeng
South Africa
CwbTemperate, dry winter, warm summer(99 %)
Species observed
2 375
Observations
308 500
Area
2 688,4km²
Ecological tissue
Sample of 20 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 Sedibeng : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 15 interactions GloBI sur 3 types (connectance 7.9%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
20
Interactions affichées
15
Connectance
0.079
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
2 375 distinct species · 308 500 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
16,3°C
Annual rain
680mm
Warmest m°
25,7°C
Coldest m°
2,9°C
Elevation: 1 519 m on average (min 1 422 m, max 1 849 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
16,3°C
Annual rain
680mm
Warmest month
25,7°C
Coldest month
2,9°C
Mean alt.
1 519m
Min
1 422m
Max
1 849m
Std. dev.
66m
Köppen-Geiger (dominant)
CwbTemperate, dry winter, warm summer(99 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,2
Org. C
13,1g/kg
Clay
25,7%
Sand
63,8%
Silt
10,5%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,2
Org. C
16,7g/kg
Clay
25,0%
Sand
64,0%
Silt
11,0%
5–15 cm
pH H₂O
6,2
Org. C
11,4g/kg
Clay
24,5%
Sand
65,0%
Silt
10,5%
15–30 cm
pH H₂O
6,2
Org. C
11,2g/kg
Clay
27,5%
Sand
62,4%
Silt
10,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest4.4%
Crops27.2%
Built-up2.7%
Bare soil2.6%
Other (grassland, water…)63.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology14 basins · 17 lakes · 9 rivers
Hydrology metrics for this exact territory
Stream length here
389,1km
Lake surface here
38,58km²
Basins crossed
14
Max stream order
6
Max drainage
49 685km²
Discharge in basins
147,6m³/s
Mean precip.
686mm/an
Mean T°
16,0°C
Moisture idx
-0,54
Mean runoff
28mm/an
Mean elev. (basins)
1 547m
Watersheds crossing here
- Bassin de Klipsub-area2 260,5 km²overlap787.42 km²29%
- Bassin de Rietspruitsub-area1 141 km²overlap617.10 km²23%
- Bassin de Suikerbosrand Riversub-area470,5 km²overlap411.41 km²15%
- Bassin de Vaal Riversub-area522,7 km²overlap239.47 km²9%
- Bassin de Vaal Riversub-area213,9 km²overlap163.16 km²6%
- Bassin de Suikerbosrand Riversub-area1 568,5 km²overlap147.88 km²6%
- Bassin de Vaal Riversub-area1 924,8 km²overlap135.64 km²5%
- Bassin de Vaal Riversub-area301,7 km²overlap75.28 km²3%
- Bassin de Vaal Riversub-area2 511,8 km²overlap59.32 km²2%
5 more basinssorted by overlap
Lakes (17, top by area)
- Vaaldamarea287,8 km²avg depth11.1 m
- Leeukuildamarea1,3 km²avg depth1.9 m
- Loch Vaalarea1,1 km²avg depth51.0 m
- Lake #83404area1 km²avg depth2.0 m
- Lac 1419550area0,6 km²avg depth3.0 m
- Lac 1419664area0,6 km²avg depth2.6 m
- Lac 1419541area0,5 km²avg depth2.0 m
- Lac 1419622area0,3 km²avg depth3.4 m
- Lac 1419586area0,3 km²avg depth3.4 m
8 more lakes
Rivers / streams (9, ord ≥ 4)
- Klipord 4len here123.17 km45%total274 km
- Rietspruitord 4len here76.63 km25%total308 km
- Suikerbosrand Riverord 5len here73.33 km38%total191 km
- Vaal Riverord 7len here70.35 km3%total2358 km
- Leeuspruitord 4len here17.57 km7%total240 km
- Klein-Rietspruitord 2len here15.03 km75%total20 km
- Modderfonteinord 2len here4.94 km56%total9 km
- Blesboklaagteord 1len here4.86 km100%total5 km
- Suikerbosrandord 1len here3.24 km43%total8 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
3hab/km²
Night light
3,0nW
Built-up
267,9%
Pesticides
43,2kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas9
IUCN Not Reported · 9
Suikerbosrand Nature Reserve
IUCN Not ReportedNature Reserve · 1974
113 km²
Keyterskloof Private Nature Reserve
IUCN Not ReportedNature Reserve · 1965
19 km²
Johanna Jacobs Private Nature Reserve
IUCN Not ReportedNature Reserve · 1955
15 km²
Klipkraal Protected Environment
IUCN Not ReportedProtected Environment · 2019
12 km²
Tweefontein Private Nature Reserve
IUCN Not ReportedNature Reserve · 1995
10 km²
Complete list9 protected areas
- Vaaldam Nature ReserveNature ReserveIUCN Not Reported1954253 km²
- Suikerbosrand Nature ReserveNature ReserveIUCN Not Reported1974113 km²
- Keyterskloof Private Nature ReserveNature ReserveIUCN Not Reported196519 km²
- Johanna Jacobs Private Nature ReserveNature ReserveIUCN Not Reported195515 km²
- Klipkraal Protected EnvironmentProtected EnvironmentIUCN Not Reported201912 km²
- Tweefontein Private Nature ReserveNature ReserveIUCN Not Reported199510 km²
- Klipkraal Nature ReserveNature ReserveIUCN Not Reported20195 km²
- Klipkraal Hollenbach Protected EnvironmentProtected EnvironmentIUCN Not Reported20195 km²
- Leeuwkuil Nature ReserveNature ReserveIUCN Not Reported19621 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN