Zwartkops Valley Nature Reserve
IUCN Not ReportedNature Reserve · 1993
10 km²
Subdivision · ZAF
60
South Africa
BShArid, steppe, hot(99 %)
Species observed
2 381
Observations
90 580
Area
83,7km²
Ecological tissue
Sample of 21 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 60 : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 2 types (connectance 11.9%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
21
Interactions affichées
25
Connectance
0.119
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
2 381 distinct species · 90 580 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
18,5°C
Annual rain
481mm
Warmest m°
25,4°C
Coldest m°
11,2°C
Elevation: 25 m on average (min -5 m, max 88 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
18,5°C
Annual rain
481mm
Warmest month
25,4°C
Coldest month
11,2°C
Mean alt.
25m
Min
-5m
Max
88m
Std. dev.
20m
Köppen-Geiger (dominant)
BShArid, steppe, hot(99 %)Arid
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,8
Org. C
23,5g/kg
Clay
26,8%
Sand
53,8%
Silt
19,4%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiMaggregated to Nelson Mandela Bay
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,6
Org. C
31,2g/kg
Clay
25,3%
Sand
54,9%
Silt
19,8%
5–15 cm
pH H₂O
6,7
Org. C
22,3g/kg
Clay
25,7%
Sand
54,6%
Silt
19,7%
15–30 cm
pH H₂O
6,9
Org. C
17,1g/kg
Clay
29,4%
Sand
51,9%
Silt
18,7%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest10.7%
Crops0.7%
Built-up5.3%
Bare soil4.6%
Other (grassland, water…)78.6%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 7 lakes · 4 rivers
Hydrology metrics for this exact territory
Stream length here
25,2km
Lake surface here
2,41km²
Basins crossed
1
Max stream order
3
Max drainage
2 669km²
Discharge in basins
0,0m³/s
Mean precip.
504mm/an
Mean T°
17,1°C
Moisture idx
-0,59
Mean runoff
66mm/an
Mean elev. (basins)
257m
Watersheds crossing here
Lakes (7, top by area)
Rivers / streams (4, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
3hab/km²
Night light
12,6nW
Built-up
532,6%
Pesticides
2,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1🌊 Marine · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN