Ontologia

HydroBASINS lev08 watershed · #1080741300

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 4 administrative regions across 2 countries : Dosso, Gaya, Karimama, Malanville

Pfafstetter: 14259001

Sub-basin area

411,5km²

Upstream area

1 252 304,6km²

Discharge

1 090,54m³/s

Mean elev.

190m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Niger288 km²

▲ Receives from 2 basins

4 dept-equivalent regions (GADM L2)

  • Gaya
    Dosso · Niger
    295.8 km²
    72.2% of basin
  • Karimama
    Alibori · Benin
    87.3 km²
    21.3% of basin
  • Dosso
    Dosso · Niger
    26.1 km²
    6.4% of basin
  • Malanville
    Alibori · Benin
    0.7 km²
    0.2% of basin

4 intersecting protected areas

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

Species present

539 distinct species · 1 161 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 161 obs · 10 cellules
Obs. / cellule
≥ 421
421–420
170–420
110–169
< 110

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 : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 42 interactions GloBI sur 4 types (connectance 7.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
42
Connectance
0.075
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°

29,0°C

Annual rain

702mm

Moisture idx (CMI)

-0,65

Runoff

83mm/an

PET

2 007mm

AET

592mm

Mean slope

0,7°

Water table

107cm

Forest

0%

Crops

26%

Urban

7%

Protected

0%

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