Ontologia

HydroBASINS lev08 watershed · #1081658050

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

Pfafstetter: 12556103

Sub-basin area

301,4km²

Upstream area

30 076,1km²

Discharge

25,37m³/s

Mean elev.

238m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Great Fish River13 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

2 intersecting protected areas

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

Species present

780 distinct species · 5 981 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

5 981 obs · 10 cellules
Obs. / cellule
≥ 2 528
2 528–2 527
585–2 527
483–584
< 483

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

Ecological tissue

Sample of 35 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 : 32 espèces reliées par 43 interactions GloBI sur 4 types (connectance 7.2%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
43
Connectance
0.072
Patrimoniales
0
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°

18,0°C

Annual rain

584mm

Moisture idx (CMI)

-0,53

Runoff

94mm/an

PET

1 241mm

AET

496mm

Mean slope

8,5°

Water table

672cm

Forest

88%

Crops

21%

Urban

0%

Protected

0%

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