Ontologia

HydroBASINS lev08 watershed · #2080678980

Bassin de Rio Xarrama

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 6 administrative regions : Alcácer do Sal, Alvito, Grândola, Portel, Viana do Alentejo +1

4% lakePfafstetter: 23150063

Sub-basin area

1 049,8km²

Upstream area

5 121,8km²

Discharge

32,5m³/s

Mean elev.

136m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Rio Sado161 km²

▲ Receives from 2 basins

6 dept-equivalent regions (GADM L2)

4 intersecting protected areas

  • Évora

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    81.99 km² overlap

  • Cabrela

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    7.73 km² overlap

  • Comporta / Galé

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    1.67 km² overlap

  • Alvito/Cuba

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    0.27 km² overlap

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

Species present

2 260 distinct species · 114 210 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

114 210 obs · 26 cellules
Obs. / cellule
≥ 40 933
8 262–40 932
3 445–8 261
2 115–3 444
< 2 115

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

Ecological tissue

Sample of 35 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 Rio Xarrama : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 90 interactions GloBI sur 4 types (connectance 15.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
90
Connectance
0.151
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°

16,6°C

Annual rain

590mm

Moisture idx (CMI)

-0,49

Runoff

210mm/an

PET

1 158mm

AET

499mm

Mean slope

1,8°

Water table

277cm

Forest

26%

Crops

53%

Urban

2%

Protected

0%

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