Ontologia

HydroBASINS lev08 watershed · #2080693860

Bassin de Ribeira de Oeiras

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 3 administrative regions : Almodôvar, Castro Verde, Mértola

2% lakePfafstetter: 23140106

Sub-basin area

472,7km²

Upstream area

473,3km²

Discharge

3,54m³/s

Mean elev.

212m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Ribeira de Carreiras456 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

  • Mértola
    Beja · Portugal
    228.2 km²
    48.3% of basin
  • Almodôvar
    Beja · Portugal
    147.7 km²
    31.2% of basin
  • Castro Verde
    Beja · Portugal
    97.0 km²
    20.5% of basin

5 intersecting protected areas

  • Castro Verde

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    126.05 km² overlap

  • Guadiana

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    86.50 km² overlap

  • Vale do Guadiana

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    65.24 km² overlap

  • Vale do Guadiana

    IUCN V

    Nature Park

    60.83 km² overlap

  • Ribeira do Vascão

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

    0.04 km² overlap

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

Species present

2 049 distinct species · 151 464 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

151 464 obs · 15 cellules
Obs. / cellule
≥ 35 877
28 460–35 876
10 843–28 459
7 261–10 842
< 7 261

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

Ecological tissue

Sample of 29 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 Ribeira de Oeiras : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 57 interactions GloBI sur 3 types (connectance 14.0%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
57
Connectance
0.140
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°

16,4°C

Annual rain

550mm

Moisture idx (CMI)

-0,53

Runoff

228mm/an

PET

1 171mm

AET

466mm

Mean slope

2,9°

Water table

245cm

Forest

25%

Crops

30%

Urban

0%

Protected

13%

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