Ontologia

Commune · ZAF

Swellendam

South Africa

BSkArid, steppe, cold(53 %)

Species observed

5 813

Observations

230 734

Area

3 835,5km²

Ecological tissue

Sample of 40 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 Swellendam : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 40 interactions GloBI sur 4 types (connectance 5.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
40
Interactions affichées
40
Connectance
0.051
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

5 813 distinct species · 230 734 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

230 734 obs · 110 cellules
Obs. / cellule
≥ 22 613
4 279–22 612
1 834–4 278
571–1 833
< 571

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

Climate

Mean T°

16,3°C

Annual rain

531mm

Warmest m°

27,3°C

Coldest m°

5,5°C

Elevation: 372 m on average (min -11 m, max 1 379 m)

Bioclimatic detailsExpert
Annual mean temp.
16,3°C
Annual rain
531mm
Warmest month
27,3°C
Coldest month
5,5°C
Mean alt.
372m
Min
-11m
Max
1 379m
Std. dev.
289m
Köppen-Geiger (dominant)
BSkArid, steppe, cold(53 %)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

24,2g/kg

Clay

22,9%

Sand

62,5%

Silt

14,6%

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

Dominant lithology: ssGLiMaggregated to Overberg

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,1
Org. C
34,2g/kg
Clay
19,6%
Sand
65,4%
Silt
15,0%
5–15 cm
pH H₂O
7,2
Org. C
22,6g/kg
Clay
23,9%
Sand
61,6%
Silt
14,5%
15–30 cm
pH H₂O
7,4
Org. C
15,8g/kg
Clay
25,3%
Sand
60,4%
Silt
14,3%

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

Land cover

Forest2.4%
Crops25.2%
Built-up0.1%
Bare soil10.6%
Other (grassland, water…)61.6%

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

Hydrology15 basins · 3 lakes · 51 rivers

Hydrology metrics for this exact territory

Stream length here

664,6km

Lake surface here

2,03km²

Basins crossed

15

Max stream order

5

Max drainage

12 511km²

Discharge in basins

86,9m³/s

Mean precip.

487mm/an

Mean T°

16,5°C

Moisture idx

-0,63

Mean runoff

62mm/an

Mean elev. (basins)

381m

Watersheds crossing here

6 more basins

Lakes (3, top by area)

Rivers / streams (51, ord ≥ 4)

39 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,1nW

Built-up

9,9%

Pesticides

15,4kg/km²

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

Protected areas15

IUCN Not Reported · 14IUCN Not Applicable · 1🌊 Marine · 3
Complete list

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN