Ontologia

HydroBASINS lev08 watershed · #2080664080

Bassin de Ribeira Grande

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 10 administrative regions : Alter do Chão, Arronches, Avis, Borba, Elvas +5

2% lakePfafstetter: 23150089

Sub-basin area

1 138,3km²

Upstream area

1 138,3km²

Discharge

7,76m³/s

Mean elev.

276m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Ribeira de Tera1308 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

10 dept-equivalent regions (GADM L2)

2 more
  • Alter do Chão8.1 km² · 0.7%
  • Portalegre1.3 km² · 0.1%

3 intersecting protected areas

  • Vila Fernando

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    26.70 km² overlap

  • Veiros

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    19.59 km² overlap

  • Monforte

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    18.87 km² overlap

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

Species present

1 844 distinct species · 93 135 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

93 135 obs · 31 cellules
Obs. / cellule
≥ 33 219
3 840–33 218
2 429–3 839
1 605–2 428
< 1 605

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

Ecological tissue

Sample of 32 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 Grande : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 49 interactions GloBI sur 2 types (connectance 9.9%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
49
Connectance
0.099
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

665mm

Moisture idx (CMI)

-0,43

Runoff

208mm/an

PET

1 172mm

AET

560mm

Mean slope

2,3°

Water table

232cm

Forest

19%

Crops

65%

Urban

0%

Protected

0%

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