Ontologia

HydroBASINS lev08 watershed · #1081653010

Bassin de Matjies

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 : Namakwa, West Coast

Pfafstetter: 12604802

Sub-basin area

397,1km²

Upstream area

397,1km²

Discharge

1,02m³/s

Mean elev.

1 029m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Groot13 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

11 intersecting protected areas

2 more protected areas

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

Species present

1 758 distinct species · 31 563 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

31 563 obs · 11 cellules
Obs. / cellule
≥ 7 548
7 508–7 547
3 402–7 507
1 874–3 401
< 1 874

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

Ecological tissue

Sample of 32 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 Matjies : 25 espèces reliées par 40 interactions GloBI sur 3 types (connectance 6.7%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
40
Connectance
0.067
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°

14,1°C

Annual rain

372mm

Moisture idx (CMI)

-0,73

Runoff

80mm/an

PET

1 380mm

AET

317mm

Mean slope

11,2°

Water table

774cm

Forest

0%

Crops

2%

Urban

0%

Protected

70%

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