Ontologia

HydroBASINS lev08 watershed · #1080021890

Bassin de Calabar

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 6 administrative regions : Akamkpa, Akpabuyo, Biase, Calabar, Calabar South +1

Pfafstetter: 13370904

Sub-basin area

1 839,3km²

Upstream area

1 839,3km²

Discharge

110,69m³/s

Mean elev.

104m

Administrative coverage

6 dept-equivalent regions (GADM L2)

4 intersecting protected areas

  • Oban Group

    IUCN Not Reported

    Forest Reserve

    534.57 km² overlap

  • Oban Group

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    534.57 km² overlap

  • Cross River

    IUCN II

    National Park

    385.29 km² overlap

  • Uwet Odot

    IUCN Not Reported

    Forest Reserve

    47.05 km² overlap

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

Species present

1 023 distinct species · 2 788 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 788 obs · 46 cellules
Obs. / cellule
≥ 479
176–478
62–175
25–61
< 25

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 Calabar : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 3 types (connectance 6.7%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
30
Interactions affichées
29
Connectance
0.067
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°

26,3°C

Annual rain

2 530mm

Moisture idx (CMI)

0,37

Runoff

1 803mm/an

PET

1 579mm

AET

1 294mm

Mean slope

2,5°

Water table

81cm

Forest

75%

Crops

13%

Urban

8%

Protected

37%

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