Ontologia

HydroBASINS lev08 watershed · #1080974030

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 7 administrative regions : Anambra East, Anambra West, Aniocha North, Aniocha South, Ibaji +2

Pfafstetter: 14210030

Sub-basin area

643,3km²

Upstream area

2 081 150,9km²

Discharge

6 057,39m³/s

Mean elev.

78m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de River Nsiki115 km²

▲ Receives from 2 basins

7 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Niocha

    IUCN Not Reported

    Forest Reserve

    24.90 km² overlap

  • Oroma Anam

    IUCN Not Reported

    Forest Reserve

    11.18 km² overlap

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

Species present

91 distinct species · 175 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

175 obs · 7 cellules
Obs. / cellule
≥ 116
116–115
15–115
8–14
< 8

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

Ecological tissue

Sample of 22 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 : 18 espèces reliées par 21 interactions GloBI sur 4 types (connectance 8.3%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
23
Interactions affichées
21
Connectance
0.083
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°

26,9°C

Annual rain

1 707mm

Moisture idx (CMI)

0,04

Runoff

1 182mm/an

PET

1 637mm

AET

1 125mm

Mean slope

1,2°

Water table

68cm

Forest

24%

Crops

86%

Urban

30%

Protected

6%

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