Basse Vallée de l'Ouémé, Lagune de Porto-Novo, Lac Nokoué
IUCN VWetland of International Importance (Ramsar Site) · 2000
6 532 km²
Local Authority · NGA
Yewa North
Nigeria
AwTropical, savannah(100 %)
Species observed
382
Observations
2 154
Area
1 960,4km²
Ecological tissue
Sample of 29 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 Yewa North : 23 espèces reliées par 29 interactions GloBI sur 4 types (connectance 7.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
29
Interactions affichées
29
Connectance
0.071
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
382 distinct species · 2 154 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
26,8°C
Annual rain
1 122mm
Warmest m°
34,7°C
Coldest m°
22,1°C
Elevation: 80 m on average (min 13 m, max 222 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
26,8°C
Annual rain
1 122mm
Warmest month
34,7°C
Coldest month
22,1°C
Mean alt.
80m
Min
13m
Max
222m
Std. dev.
43m
Köppen-Geiger (dominant)
AwTropical, savannah(100 %)Tropical
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,0
Org. C
19,3g/kg
Clay
19,0%
Sand
64,7%
Silt
16,2%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: ssGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,1
Org. C
30,0g/kg
Clay
19,3%
Sand
64,0%
Silt
16,7%
5–15 cm
pH H₂O
6,0
Org. C
17,4g/kg
Clay
18,4%
Sand
65,4%
Silt
16,1%
15–30 cm
pH H₂O
6,0
Org. C
10,7g/kg
Clay
19,4%
Sand
64,8%
Silt
15,8%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest25.6%
Crops14.4%
Built-up0.7%
Bare soil0.1%
Other (grassland, water…)59.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology7 basins · 0 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
130,9km
Basins crossed
7
Max stream order
5
Max drainage
22 166km²
Discharge in basins
51,3m³/s
Mean precip.
1 139mm/an
Mean T°
27,2°C
Moisture idx
-0,34
Mean runoff
463mm/an
Mean elev. (basins)
101m
Watersheds crossing here
- Bassin de Yewasub-area1 201,3 km²overlap649.46 km²33%
- Bassin de Yewasub-area593,1 km²overlap537.81 km²27%
- Bassin de Yewasub-area596,6 km²overlap324.34 km²17%
- Basin #43130sub-area722,2 km²overlap316.26 km²16%
- Bassin de Yewasub-area1 213,4 km²overlap116.16 km²6%
- Bassin de Ogunsub-area2 088 km²overlap11.92 km²1%
- Bassin de Oyansub-area4 488,6 km²overlap4.43 km²0%
Rivers / streams (1, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
0,1nW
Built-up
74,0%
Pesticides
35,5kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas4
IUCN Not Reported · 3IUCN V · 1🌊 Marine · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN