Ontologia

HydroBASINS lev08 watershed · #1081019670

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 3 administrative regions : Kolokuma/Opokuma, Southern Ijaw, Yenagoa

Pfafstetter: 14210015

Sub-basin area

227km²

Upstream area

2 097 797,5km²

Discharge

6 703,1m³/s

Mean elev.

17m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Niger136 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Nun River

    IUCN Not Reported

    Forest Reserve

    44.99 km² overlap

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

Species present

311 distinct species · 860 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

860 obs · 5 cellules
Obs. / cellule
≥ 676
676–675
99–675
65–98
< 65

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

Ecological tissue

Sample of 35 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 : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 4 types (connectance 5.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
36
Connectance
0.051
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°

26,7°C

Annual rain

2 921mm

Moisture idx (CMI)

0,47

Runoff

1 624mm/an

PET

1 534mm

AET

1 328mm

Mean slope

0,7°

Water table

25cm

Forest

100%

Crops

6%

Urban

36%

Protected

20%

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