Ontologia

HydroBASINS lev08 watershed · #1080191450

Bassin de Oued Siyad

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 : Guelmim

Pfafstetter: 15150203

Sub-basin area

326,1km²

Upstream area

4 951,8km²

Discharge

7,12m³/s

Mean elev.

471m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Oued Das1048 km²

▲ Receives from 2 basins

1 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

276 distinct species · 1 620 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 620 obs · 10 cellules
Obs. / cellule
≥ 758
758–757
266–757
26–265
< 26

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

Ecological tissue

Sample of 23 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 Oued Siyad : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 48 interactions GloBI sur 4 types (connectance 19.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
23
Interactions affichées
48
Connectance
0.190
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°

18,4°C

Annual rain

125mm

Moisture idx (CMI)

-0,90

Runoff

45mm/an

PET

1 276mm

AET

108mm

Mean slope

5,6°

Water table

788cm

Forest

0%

Crops

0%

Urban

2%

Protected

0%

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