Ontologia

HydroBASINS lev08 watershed · #1080015290

Bassin de Modder

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 : City of Cape Town, West Coast

Coastal basinPfafstetter: 12601090

Sub-basin area

2 120,1km²

Upstream area

2 120,1km²

Discharge

2,99m³/s

Mean elev.

72m

Administrative coverage

2 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

4 611 distinct species · 551 323 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

551 323 obs · 60 cellules
Obs. / cellule
≥ 189 899
21 834–189 898
6 139–21 833
2 995–6 138
< 2 995

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

Ecological tissue

Sample of 31 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 Modder : 28 espèces reliées par 26 interactions GloBI sur 2 types (connectance 5.6%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
26
Connectance
0.056
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°

17,3°C

Annual rain

368mm

Moisture idx (CMI)

-0,69

Runoff

136mm/an

PET

1 198mm

AET

316mm

Mean slope

1,9°

Water table

476cm

Forest

4%

Crops

49%

Urban

4%

Protected

97%

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