Ontologia

HydroBASINS lev08 watershed · #1080721820

Bassin de 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 : Boboye, Kollo, Say

Pfafstetter: 14271300

Sub-basin area

774,3km²

Upstream area

716 274,6km²

Discharge

864,03m³/s

Mean elev.

216m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Dallol Bosso28 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

  • Say
    Tillabéry · Niger
    486.6 km²
    63.1% of basin
  • Boboye
    Dosso · Niger
    227.4 km²
    29.5% of basin
  • Kollo
    Tillabéry · Niger
    57.3 km²
    7.4% of basin

8 intersecting protected areas

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

Species present

501 distinct species · 1 936 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 936 obs · 21 cellules
Obs. / cellule
≥ 327
279–326
119–278
27–118
< 27

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

Ecological tissue

Sample of 30 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 de Niger : 22 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 48 interactions GloBI sur 3 types (connectance 10.3%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
48
Connectance
0.103
Patrimoniales
2
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°

28,8°C

Annual rain

643mm

Moisture idx (CMI)

-0,69

Runoff

77mm/an

PET

2 049mm

AET

542mm

Mean slope

0,9°

Water table

278cm

Forest

0%

Crops

31%

Urban

0%

Protected

100%

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