Jerwa
IUCN Not ReportedForest Reserve
24 km²
Local Authority · NGA
Gamawa
Nigeria
BShArid, steppe, hot(100 %)
Species observed
215
Observations
2 100
Area
2 969,1km²
Ecological tissue
Sample of 28 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 Gamawa : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 3 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
1
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
215 distinct species · 2 100 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
27,1°C
Annual rain
572mm
Warmest m°
39,1°C
Coldest m°
13,8°C
Elevation: 369 m on average (min 349 m, max 401 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
27,1°C
Annual rain
572mm
Warmest month
39,1°C
Coldest month
13,8°C
Mean alt.
369m
Min
349m
Max
401m
Std. dev.
12m
Köppen-Geiger (dominant)
BShArid, steppe, hot(100 %)Arid
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,6
Org. C
5,7g/kg
Clay
13,2%
Sand
65,9%
Silt
20,9%
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
6,6
Org. C
7,1g/kg
Clay
13,0%
Sand
66,1%
Silt
20,9%
5–15 cm
pH H₂O
6,6
Org. C
5,4g/kg
Clay
13,1%
Sand
66,0%
Silt
20,9%
15–30 cm
pH H₂O
6,6
Org. C
4,6g/kg
Clay
13,6%
Sand
65,6%
Silt
20,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest4.1%
Crops37.5%
Built-up0.3%
Bare soil1.8%
Other (grassland, water…)56.2%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology10 basins · 1 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
38,3km
Lake surface here
0,15km²
Basins crossed
10
Max stream order
5
Max drainage
22 450km²
Discharge in basins
31,5m³/s
Mean precip.
648mm/an
Mean T°
26,1°C
Moisture idx
-0,69
Mean runoff
64mm/an
Mean elev. (basins)
377m
Watersheds crossing here
- Bassin de Komadugu Ganasub-area2 807,9 km²overlap1106.34 km²37%
- Basin #18260sub-area1 203,1 km²overlap619.38 km²21%
- Bassin de Komadugu Ganasub-area5 459 km²overlap562.39 km²19%
- Basin #40140sub-area1 519,3 km²overlap224.53 km²8%
- Basin #17780sub-area483,6 km²overlap218.50 km²7%
- Basin #10450sub-area1 306,8 km²overlap122.73 km²4%
- Basin #26550sub-area823,9 km²overlap51.66 km²2%
- Basin #34150sub-area1 687,8 km²overlap44.33 km²1%
- Basin #21510sub-area281,5 km²overlap15.01 km²1%
1 more basinssorted by overlap
Lakes (1, top by area)
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
0,0nW
Built-up
30,5%
Pesticides
28,2kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN