Otamiri River
IUCN Not ReportedForest Reserve
173 km²
Local Authority · NGA
Ohaji/Egbema
Nigeria
AmTropical, monsoon(100 %)
Species observed
125
Observations
260
Area
1 146,8km²
Ecological tissue
Sample of 21 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 Ohaji/Egbema : 16 espèces reliées par 21 interactions GloBI sur 3 types (connectance 9.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
22
Interactions affichées
21
Connectance
0.091
Patrimoniales
0
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
125 distinct species · 260 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
25,9°C
Annual rain
2 456mm
Warmest m°
34,0°C
Coldest m°
21,9°C
Elevation: 39 m on average (min 13 m, max 64 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
25,9°C
Annual rain
2 456mm
Warmest month
34,0°C
Coldest month
21,9°C
Mean alt.
39m
Min
13m
Max
64m
Std. dev.
14m
Köppen-Geiger (dominant)
AmTropical, monsoon(100 %)Tropical
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,2
Org. C
22,8g/kg
Clay
16,3%
Sand
74,3%
Silt
9,4%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,3
Org. C
30,6g/kg
Clay
14,5%
Sand
75,7%
Silt
9,8%
5–15 cm
pH H₂O
5,2
Org. C
24,0g/kg
Clay
15,2%
Sand
75,5%
Silt
9,4%
15–30 cm
pH H₂O
5,2
Org. C
13,9g/kg
Clay
19,1%
Sand
71,8%
Silt
9,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest42.9%
Crops8.1%
Built-up0.9%
Bare soil0.2%
Other (grassland, water…)47.8%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology5 basins · 1 lakes · 6 rivers
Hydrology metrics for this exact territory
Stream length here
64,7km
Lake surface here
0,18km²
Basins crossed
5
Max stream order
5
Max drainage
4 219km²
Discharge in basins
78,5m³/s
Mean precip.
2 401mm/an
Mean T°
26,6°C
Moisture idx
0,35
Mean runoff
1 530mm/an
Mean elev. (basins)
33m
Watersheds crossing here
- Bassin de Sombreiro Riversub-area1 336,8 km²overlap509.33 km²44%
- Bassin de Orashi Riversub-area1 835,1 km²overlap398.51 km²35%
- Bassin de New Calabar Riversub-area970,6 km²overlap132.60 km²12%
- Bassin de Otamiri Riversub-area2 491,8 km²overlap104.75 km²9%
- Bassin de Orashi Riversub-area216,3 km²overlap1.61 km²0%
Lakes (1, top by area)
Rivers / streams (6, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
2hab/km²
Night light
4,0nW
Built-up
89,3%
Pesticides
37,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas2
IUCN Not Reported · 2
Ohaji
IUCN Not ReportedForest Reserve
11 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN