Ontologia

HydroBASINS lev08 watershed · #1080742220

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 2 administrative regions across 2 countries : Gaya, Malanville

Pfafstetter: 14257000

Sub-basin area

287,9km²

Upstream area

1 266 567,5km²

Discharge

951,41m³/s

Mean elev.

194m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Niger507 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

  • Gaya
    Dosso · Niger
    170.7 km²
    59.5% of basin
  • Malanville
    Alibori · Benin
    116.1 km²
    40.5% of basin

2 intersecting protected areas

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

Species present

357 distinct species · 804 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

804 obs · 9 cellules
Obs. / cellule
≥ 455
455–454
84–454
32–83
< 32

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

Ecological tissue

Sample of 34 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 32 interactions GloBI sur 5 types (connectance 5.7%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
32
Connectance
0.057
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°

28,9°C

Annual rain

813mm

Moisture idx (CMI)

-0,59

Runoff

88mm/an

PET

1 995mm

AET

686mm

Mean slope

0,5°

Water table

152cm

Forest

0%

Crops

19%

Urban

4%

Protected

0%

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