Ontologia

HydroBASINS lev08 watershed · #1080952740

Bassin de Arun

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 8 administrative regions : Atakumosa East, Idanre, Ile-Oluji/Okeigbo, Irele, Odigbo +3

Pfafstetter: 14303047

Sub-basin area

987,6km²

Upstream area

2 305,2km²

Discharge

56,04m³/s

Mean elev.

218m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Owena River231 km²

▲ Receives from 2 basins

8 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Idanre

    IUCN Not Reported

    Forest Reserve

    187.07 km² overlap

  • Onishere

    IUCN Not Reported

    Forest Reserve

    77.78 km² overlap

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

Species present

632 distinct species · 2 087 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 087 obs · 22 cellules
Obs. / cellule
≥ 462
184–461
107–183
88–106
< 88

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

Ecological tissue

Sample of 27 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 Arun : 23 espèces reliées par 22 interactions GloBI sur 3 types (connectance 6.3%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
27
Interactions affichées
22
Connectance
0.063
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°

26,0°C

Annual rain

1 607mm

Moisture idx (CMI)

0,00

Runoff

822mm/an

PET

1 609mm

AET

1 134mm

Mean slope

3,5°

Water table

142cm

Forest

26%

Crops

44%

Urban

3%

Protected

27%

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