Ontologia

HydroBASINS lev08 watershed · #2080018720

Bassin de Ribeira de São Martinho

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 14 administrative regions : Alcochete, Alcácer do Sal, Almada, Barreiro, Benavente +9

Coastal basin 2% lakePfafstetter: 23150070

Sub-basin area

2 148,4km²

Upstream area

2 148,4km²

Discharge

0,05m³/s

Mean elev.

65m

Administrative coverage

14 dept-equivalent regions (GADM L2)

6 more
  • Seixal89.0 km² · 4.1%
  • Benavente83.1 km² · 3.9%
  • Almada70.1 km² · 3.3%
  • Moita44.7 km² · 2.1%
  • Barreiro32.1 km² · 1.5%
  • Vila Franca de Xira0.0 km² · 0.0%

22 intersecting protected areas

  • Cabrela

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    196.86 km² overlap

  • Arrábida / Espichel

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    159.49 km² overlap

  • Estuário do Sado

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    158.63 km² overlap

  • Arrabida

    IUCN V

    Nature Park

    131.72 km² overlap

  • Estuário do Sado

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    117.34 km² overlap

  • Estuario do Sado

    IUCN IV

    Nature Reserve

    114.81 km² overlap

  • Estuário do Sado

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    112.57 km² overlap

  • Estuário do Tejo

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    69.95 km² overlap

  • Estuário do Tejo

    IUCN Not Reported

    Site of Community Importance (Habitats Directive)

    66.79 km² overlap

13 more protected areas

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

Species present

7 416 distinct species · 1 068 344 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 068 344 obs · 52 cellules
Obs. / cellule
≥ 168 343
56 826–168 342
20 031–56 825
4 430–20 030
< 4 430

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

Ecological tissue

Sample of 34 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 São Martinho : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 58 interactions GloBI sur 3 types (connectance 10.3%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
58
Connectance
0.103
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°

16,8°C

Annual rain

657mm

Moisture idx (CMI)

-0,39

Runoff

241mm/an

PET

1 078mm

AET

551mm

Mean slope

2,0°

Water table

207cm

Forest

38%

Crops

39%

Urban

15%

Protected

13%

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