Ontologia

Commune · CMR

Douala 4

Cameroon

AmTropical, monsoon(100 %)

Species observed

174

Observations

528

Area

338,1km²

Ecological tissue

Sample of 35 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 Douala 4 : 29 espèces dont 5 patrimoniales (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 3 types (connectance 6.0%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
38
Connectance
0.060
Patrimoniales
5
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

174 distinct species · 528 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

528 obs · 10 cellules
Obs. / cellule
≥ 299
299–298
79–298
11–78
< 11

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

Climate

Mean T°

26,1°C

Annual rain

3 142mm

Warmest m°

29,3°C

Coldest m°

23,3°C

Elevation: 4 m on average (min -5 m, max 21 m)

Bioclimatic detailsExpert
Annual mean temp.
26,1°C
Annual rain
3 142mm
Warmest month
29,3°C
Coldest month
23,3°C
Mean alt.
4m
Min
-5m
Max
21m
Std. dev.
2m
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

5,1

Org. C

42,3g/kg

Clay

34,4%

Sand

35,3%

Silt

30,3%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: ssGLiMaggregated to Wouri

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,1
Org. C
52,2g/kg
Clay
31,5%
Sand
37,4%
Silt
31,1%
5–15 cm
pH H₂O
5,1
Org. C
44,1g/kg
Clay
32,4%
Sand
36,5%
Silt
31,1%
15–30 cm
pH H₂O
5,1
Org. C
30,6g/kg
Clay
39,3%
Sand
32,1%
Silt
28,7%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest53.0%
Crops0.5%
Built-up3.2%
Bare soil0.1%
Other (grassland, water…)43.2%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology4 basins · 0 lakes · 6 rivers

Hydrology metrics for this exact territory

Stream length here

8,6km

Basins crossed

4

Max stream order

6

Max drainage

12 236km²

Discharge in basins

47,9m³/s

Mean precip.

3 250mm/an

Mean T°

25,9°C

Moisture idx

0,55

Mean runoff

1 922mm/an

Mean elev. (basins)

36m

Watersheds crossing here

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

12hab/km²

Night light

1,0nW

Built-up

323,6%

Pesticides

1,4kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)