Rivière· 44 segments
Great Brak River
Crosses 2 administrative regions : Chris Hani, Joe Gqabi
Total length
137km
Max discharge
3,6m³/s
Max Strahler
5
Segments matched
44
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- Chris HaniEastern Cape · South Africa152.6 kmin this dpt
- Joe GqabiEastern Cape · South Africa41.8 kmin this dpt
1 page = 1 named river (aggregation of 44 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
133 distinct species · 220 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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).
Indicateurs du tissu écologique
Tissu écologique de Great Brak River : 22 espèces reliées par 30 interactions GloBI sur 3 types (connectance 6.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
137km
Max discharge
3,6m³/s
Max Strahler
5
Segments matched
44
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.