Oviston Nature Reserve
IUCN Not ReportedNature Reserve · 1981
323 km²
Commune · ZAF
Gariep
South Africa
BSkArid, steppe, cold(96 %)
Species observed
1 743
Observations
29 544
Area
8 911,1km²
Ecological tissue
Sample of 30 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 Gariep : 27 espèces reliées par 26 interactions GloBI sur 3 types (connectance 6.0%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
30
Interactions affichées
26
Connectance
0.060
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
1 743 distinct species · 29 544 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
15,3°C
Annual rain
502mm
Warmest m°
29,3°C
Coldest m°
0,9°C
Elevation: 1 465 m on average (min 1 170 m, max 1 971 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
15,3°C
Annual rain
502mm
Warmest month
29,3°C
Coldest month
0,9°C
Mean alt.
1 465m
Min
1 170m
Max
1 971m
Std. dev.
140m
Köppen-Geiger (dominant)
BSkArid, steppe, cold(96 %)Arid
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
7,3
Org. C
11,5g/kg
Clay
26,8%
Sand
52,9%
Silt
20,3%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to Joe Gqabi
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
7,2
Org. C
14,5g/kg
Clay
23,5%
Sand
55,3%
Silt
21,2%
5–15 cm
pH H₂O
7,3
Org. C
10,8g/kg
Clay
23,2%
Sand
55,6%
Silt
21,1%
15–30 cm
pH H₂O
7,5
Org. C
9,1g/kg
Clay
33,8%
Sand
47,7%
Silt
18,6%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest3.4%
Crops9.5%
Built-up0.0%
Bare soil8.3%
Other (grassland, water…)78.7%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology20 basins · 39 lakes · 20 rivers
Hydrology metrics for this exact territory
Stream length here
773,7km
Lake surface here
158,30km²
Basins crossed
20
Max stream order
6
Max drainage
71 229km²
Discharge in basins
580,6m³/s
Mean precip.
473mm/an
Mean T°
14,5°C
Moisture idx
-0,67
Mean runoff
15mm/an
Mean elev. (basins)
1 477m
Watersheds crossing here
- Bassin de Stormberg Spruitsub-area4 208,4 km²overlap2439.12 km²27%
- Bassin de Broekspruitsub-area1 867,9 km²overlap1866.10 km²21%
- Bassin de Suurbergspruitsub-area1 073,2 km²overlap957.44 km²11%
- Bassin de Orange–Fish River Water Tunnelsub-area749,8 km²overlap720.84 km²8%
- Bassin de Orange–Fish River Water Tunnelsub-area572,2 km²overlap571.38 km²6%
- Bassin de Hongerskloofriviersub-area716,7 km²overlap455.62 km²5%
- Bassin de Palmietspruitsub-area338,3 km²overlap337.97 km²4%
- Bassin de Orange Riversub-area825,5 km²overlap330.49 km²4%
- Bassin de Great Brak Riversub-area1 606,1 km²overlap327.42 km²4%
11 more basinssorted by overlap
- Bassin de Orange Riversub-area285,6 km²overlap214.16 km²2%
- Bassin de Orange Riversub-area206,9 km²overlap206.73 km²2%
- Bassin de Orange Riversub-area1 255,7 km²overlap176.96 km²2%
- Bassin de Holspruitsub-area2 260,1 km²overlap102.92 km²1%
- Bassin de Orange Riversub-area147,5 km²overlap70.27 km²1%
- Bassin de Teebus Riversub-area406,5 km²overlap55.67 km²1%
- Bassin de Orange Riversub-area160,9 km²overlap51.99 km²1%
- Bassin de Oorlogspoortsub-area2 076,5 km²overlap20.53 km²0%
- Bassin de Orange Riversub-area4,7 km²overlap2.86 km²0%
- Bassin de Vlekpoortriviersub-area1 555,8 km²overlap1.94 km²0%
- Bassin de Orange Riversub-area656,6 km²overlap0.66 km²0%
Lakes (39, top by area)
- Hendrik Verwoerdarea294,4 km²avg depth19.3 m
- Lake #84095area5 km²avg depth2.1 m
- Lac 1423060area0,8 km²avg depth3.6 m
- Lac 1423554area0,7 km²avg depth3.7 m
- Lac 1423549area0,6 km²avg depth4.6 m
- Lac 1423042area0,4 km²avg depth2.5 m
- Lac 1423391area0,4 km²avg depth5.3 m
- Lac 1423331area0,4 km²avg depth2.5 m
- Lac 1423052area0,4 km²avg depth2.4 m
30 more lakes
- Lac 1423472area0,3 km²avg depth2.4 m
- Lac 1423525area0,3 km²avg depth2.5 m
- Lac 1423045area0,3 km²avg depth5.7 m
- Lac 1423279area0,3 km²avg depth2.3 m
- Lac 1423568area0,3 km²avg depth5.4 m
- Lac 1423407area0,3 km²avg depth3.1 m
- Lac 1423061area0,2 km²avg depth1.8 m
- Lac 1423562area0,2 km²avg depth1.9 m
- Lac 1423511area0,2 km²avg depth3.5 m
- Lac 1423518area0,2 km²avg depth2.3 m
- Lac 1423126area0,2 km²avg depth2.8 m
- Lac 1423353area0,2 km²avg depth3.3 m
- Lac 1423240area0,2 km²avg depth1.6 m
- Lac 1423442area0,2 km²avg depth2.6 m
- Lac 1423506area0,2 km²avg depth1.9 m
- Lac 1423335area0,2 km²avg depth2.6 m
- Lac 1423305area0,2 km²avg depth5.1 m
- Lac 1423494area0,2 km²avg depth2.2 m
- Lac 1423497area0,2 km²avg depth1.8 m
- Lac 1423479area0,2 km²avg depth2.0 m
- Lac 1423478area0,1 km²avg depth2.8 m
- Lac 1423535area0,1 km²avg depth1.9 m
- Lac 1423426area0,1 km²avg depth3.8 m
- Lac 1423424area0,1 km²avg depth2.8 m
- Lac 1423594area0,1 km²avg depth4.5 m
- Lac 1423441area0,1 km²avg depth2.5 m
- Lac 1423580area0,1 km²avg depth2.2 m
- Lac 1423492area0,1 km²avg depth5.9 m
- Lac 1423577area0,1 km²avg depth5.6 m
- Lac 1423383area0,1 km²avg depth1.5 m
Rivers / streams (20, ord ≥ 4)
- Orange Riverord 9len here132.90 km4%total3061 km
- Stormberg Spruitord 6len here119.49 km85%total140 km
- Broekspruitord 4len here77.06 km100%total77 km
- Suurbergspruitord 3len here56.05 km100%total56 km
- Great Brak Riverord 5len here41.85 km22%total195 km
- Orange–Fish River Water Tunnelord 2len here41.64 km100%total42 km
- Palmietspruitord 2len here41.06 km85%total49 km
- Wonderboomspruitord 3len here36.91 km100%total37 km
- Oudagspruitord 6len here35.25 km100%total35 km
- Orange–Fish River Water Tunnelord 2len here31.91 km100%total32 km
- Brakspruitord 3len here30.47 km58%total53 km
- Klein-Buffelsvleispruitord 3len here28.48 km100%total29 km
8 more river segmentssorted by Strahler order + length
- Hongerskloofrivierord 3len here27.71 km44%total63 km
- Teebus Riverord 4len here22.08 km34%total66 km
- Barnardspruitord 3len here20.75 km100%total21 km
- Bulhoekspruitord 3len here12.70 km100%total13 km
- Buitendags Spruitord 3len here7.25 km100%total7 km
- Stormbergspruitord 3len here5.39 km9%total63 km
- Kromkloofslootord 1len here3.50 km100%total4 km
- Caledon Riverord 6len here1.22 km0%total831 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,0nW
Built-up
4,1%
Pesticides
1,1kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas4
IUCN Not Reported · 4
Gariep Nature Reserve
IUCN Not ReportedNature Reserve · 1979
280 km²
Tussen-die-Riviere Game Farm
IUCN Not ReportedNature Reserve · 1972
183 km²
The Mountain Nature Reserve
IUCN Not ReportedNature Reserve · 1980
4 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN