Ontologia

HydroBASINS lev08 watershed · #2080678950

Bassin de Ribeira das Alcáçovas

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 4 administrative regions : Alcácer do Sal, Montemor-o-Novo, Viana do Alentejo, Évora

14% lakePfafstetter: 23150062

Sub-basin area

903,8km²

Upstream area

903,8km²

Discharge

6,11m³/s

Mean elev.

186m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Rio Sado161 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Cabrela

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    339.74 km² overlap

  • Monfurado

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    162.65 km² overlap

  • Évora

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    37.36 km² overlap

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

Species present

1 957 distinct species · 155 108 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

155 108 obs · 22 cellules
Obs. / cellule
≥ 73 695
9 264–73 694
5 784–9 263
3 037–5 783
< 3 037

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

Ecological tissue

Sample of 41 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 das Alcáçovas : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 111 interactions GloBI sur 5 types (connectance 13.5%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
111
Connectance
0.135
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

620mm

Moisture idx (CMI)

-0,46

Runoff

218mm/an

PET

1 140mm

AET

523mm

Mean slope

2,4°

Water table

250cm

Forest

53%

Crops

30%

Urban

0%

Protected

0%

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