Ontologia

HydroBASINS lev08 watershed · #1081656940

Bassin de Great Fish River

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 2 administrative regions : Amathole, Cacadu

2% lakePfafstetter: 12556105

Sub-basin area

267km²

Upstream area

29 606,7km²

Discharge

23,93m³/s

Mean elev.

226m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Great Fish River301 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

1 intersecting protected areas

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

377 distinct species · 1 493 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 493 obs · 7 cellules
Obs. / cellule
≥ 459
459–458
267–458
232–266
< 232

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

Ecological tissue

Sample of 34 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 Bassin de Great Fish River : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 27 interactions GloBI sur 4 types (connectance 4.8%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
27
Connectance
0.048
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

18,8°C

Annual rain

515mm

Moisture idx (CMI)

-0,62

Runoff

98mm/an

PET

1 358mm

AET

437mm

Mean slope

6,8°

Water table

535cm

Forest

65%

Crops

8%

Urban

0%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)