Ontologia

HydroBASINS lev08 watershed · #1081014580

Bassin du Niger

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 19 administrative regions : Anambra East, Dunukofia, Ekwusigo, Idemili North, Idemili South +14

2% lakePfafstetter: 14210017

Sub-basin area

1 755,7km²

Upstream area

2 097 289,8km²

Discharge

6 636,17m³/s

Mean elev.

27m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Niger227 km²

▲ Receives from 2 basins

19 dept-equivalent regions (GADM L2)

11 more

4 intersecting protected areas

  • Taylor Creek

    IUCN Not Reported

    Forest Reserve

    42.39 km² overlap

  • Egbedi Creek

    IUCN Not Reported

    Forest Reserve

    36.63 km² overlap

  • Osomari

    IUCN Not Reported

    Forest Reserve

    18.87 km² overlap

  • Nun River

    IUCN Not Reported

    Forest Reserve

    4.47 km² overlap

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

Species present

466 distinct species · 1 241 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 241 obs · 28 cellules
Obs. / cellule
≥ 189
156–188
55–155
24–54
< 24

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

Ecological tissue

Sample of 23 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 du Niger : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 3 types (connectance 13.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
36
Connectance
0.130
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

2 278mm

Moisture idx (CMI)

0,29

Runoff

1 495mm/an

PET

1 587mm

AET

1 216mm

Mean slope

0,6°

Water table

28cm

Forest

65%

Crops

22%

Urban

28%

Protected

6%

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