Ontologia

HydroBASINS lev08 watershed · #1081652820

Bassin de Gamka 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 1 administrative regions : Central Karoo

Pfafstetter: 12580467

Sub-basin area

591,7km²

Upstream area

981,9km²

Discharge

0,4m³/s

Mean elev.

871m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Gamka River131 km²

▲ Receives from 2 basins

1 dept-equivalent regions (GADM L2)

2 intersecting protected areas

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

Species present

1 534 distinct species · 115 240 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

115 240 obs · 17 cellules
Obs. / cellule
≥ 44 358
23 195–44 357
5 263–23 194
1 530–5 262
< 1 530

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

Ecological tissue

Sample of 25 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 Gamka River : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 21 interactions GloBI sur 3 types (connectance 7.0%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
25
Interactions affichées
21
Connectance
0.070
Patrimoniales
1
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°

17,5°C

Annual rain

221mm

Moisture idx (CMI)

-0,86

Runoff

10mm/an

PET

1 541mm

AET

186mm

Mean slope

2,7°

Water table

490cm

Forest

0%

Crops

0%

Urban

2%

Protected

17%

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