Ontologia

HydroBASINS lev08 watershed · #1080924940

Bassin de Oyan

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 11 administrative regions across 2 countries : Abeokuta North, Atisbo, Ibarapa Central, Ibarapa North, Imeko-Afon +6

Pfafstetter: 14304222

Sub-basin area

4 488,6km²

Upstream area

4 489,4km²

Discharge

44,92m³/s

Mean elev.

231m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Oyan514 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

11 dept-equivalent regions (GADM L2)

3 more

5 intersecting protected areas

  • Okpara

    IUCN Not Reported

    Forest Reserve

    736.49 km² overlap

  • Meko

    IUCN Not Reported

    Forest Reserve

    626.58 km² overlap

  • Opara

    IUCN Not Reported

    Game Reserve

    618.54 km² overlap

  • Igangan

    IUCN Not Reported

    Forest Reserve

    299.25 km² overlap

  • Odugebe

    IUCN Not Reported

    Forest Reserve

    149.83 km² overlap

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

Species present

201 distinct species · 1 562 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 562 obs · 72 cellules
Obs. / cellule
≥ 118
34–117
25–33
22–24
< 22

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

Ecological tissue

Sample of 37 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 Oyan : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 3 types (connectance 4.8%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
32
Connectance
0.048
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°

26,8°C

Annual rain

1 130mm

Moisture idx (CMI)

-0,37

Runoff

324mm/an

PET

1 793mm

AET

956mm

Mean slope

1,8°

Water table

180cm

Forest

26%

Crops

53%

Urban

1%

Protected

41%

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