Ontologia

HydroBASINS lev08 watershed · #1081170580

Bassin de Tana River

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 : Bura, Galole

Pfafstetter: 11720801

Sub-basin area

707,8km²

Upstream area

5 603km²

Discharge

8,06m³/s

Mean elev.

150m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Tana River1921 km²

▲ Receives from 2 basins

2 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Hirimani

    IUCN Not Reported

    Forest Reserve

    306.17 km² overlap

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

Species present

99 distinct species · 219 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

219 obs · 10 cellules
Obs. / cellule
≥ 72
72–71
35–71
19–34
< 19

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

Ecological tissue

Sample of 15 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 Tana River : 12 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 15 interactions GloBI sur 2 types (connectance 14.3%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
15
Interactions affichées
15
Connectance
0.143
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°

27,5°C

Annual rain

456mm

Moisture idx (CMI)

-0,77

Runoff

12mm/an

PET

1 967mm

AET

383mm

Mean slope

0,0°

Water table

15cm

Forest

0%

Crops

6%

Urban

0%

Protected

0%

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