Ontologia

HydroBASINS lev08 watershed · #2080653830

Bassin de Ribeira da Isna

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 9 administrative regions : Abrantes, Ferreira do Zêzere, Mação, Oleiros, Proença-a-Nova +4

25% lakePfafstetter: 23160203

Sub-basin area

652,5km²

Upstream area

3 974,9km²

Discharge

49,5m³/s

Mean elev.

334m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Ribeiro da Gata26 km²

▲ Receives from 2 basins

9 dept-equivalent regions (GADM L2)

  • Vila de Rei
    Castelo Branco · Portugal
    191.3 km²
    29.3% of basin
  • Sertã
    Castelo Branco · Portugal
    118.7 km²
    18.2% of basin
  • Abrantes
    Santarém · Portugal
    78.2 km²
    12.0% of basin
  • Tomar
    Santarém · Portugal
    64.2 km²
    9.8% of basin
  • Ferreira do Zêzere
    Santarém · Portugal
    59.6 km²
    9.1% of basin
  • Mação
    Santarém · Portugal
    57.2 km²
    8.8% of basin
  • Proença-a-Nova
    Castelo Branco · Portugal
    40.2 km²
    6.2% of basin
  • Oleiros
    Castelo Branco · Portugal
    26.4 km²
    4.0% of basin
1 more
  • Sardoal17.3 km² · 2.6%

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

Species present

1 607 distinct species · 37 280 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

37 280 obs · 17 cellules
Obs. / cellule
≥ 4 697
4 270–4 696
2 585–4 269
1 891–2 584
< 1 891

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

Ecological tissue

Sample of 43 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 da Isna : 32 espèces reliées par 95 interactions GloBI sur 6 types (connectance 10.5%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
43
Interactions affichées
95
Connectance
0.105
Patrimoniales
0
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°

15,3°C

Annual rain

919mm

Moisture idx (CMI)

-0,14

Runoff

309mm/an

PET

1 068mm

AET

653mm

Mean slope

8,0°

Water table

354cm

Forest

93%

Crops

1%

Urban

0%

Protected

0%

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