Ontologia

Department · CMR

Vallée du Ntem

Cameroon

AmTropical, monsoon(58 %)

Species observed

1 440

Observations

5 111

Area

7 225,9km²

Ecological tissue

Sample of 8 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 Vallée du Ntem : 6 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 6 interactions GloBI sur 2 types (connectance 21.4%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
8
Interactions affichées
6
Connectance
0.214
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

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

Species present

1 440 distinct species · 5 111 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

5 111 obs · 137 cellules
Obs. / cellule
≥ 414
90–413
29–89
10–28
< 10

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

Climate

Mean T°

23,3°C

Annual rain

2 052mm

Warmest m°

29,0°C

Coldest m°

19,9°C

Elevation: 553 m on average (min 235 m, max 850 m)

Bioclimatic detailsExpert
Annual mean temp.
23,3°C
Annual rain
2 052mm
Warmest month
29,0°C
Coldest month
19,9°C
Mean alt.
553m
Min
235m
Max
850m
Std. dev.
68m
Köppen-Geiger (dominant)
AmTropical, monsoon(58 %)Tropical

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

4,6

Org. C

29,7g/kg

Clay

46,1%

Sand

42,0%

Silt

11,9%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
4,6
Org. C
53,8g/kg
Clay
42,9%
Sand
44,6%
Silt
12,5%
5–15 cm
pH H₂O
4,6
Org. C
23,9g/kg
Clay
45,3%
Sand
42,8%
Silt
11,9%
15–30 cm
pH H₂O
4,6
Org. C
11,3g/kg
Clay
50,0%
Sand
38,7%
Silt
11,3%

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

Land cover

Forest93.2%
Crops0.4%
Built-up0.1%
Bare soil0.0%
Other (grassland, water…)6.3%

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

Hydrology30 basins · 0 lakes · 11 rivers

Hydrology metrics for this exact territory

Stream length here

1 035,9km

Basins crossed

30

Max stream order

6

Max drainage

28 858km²

Discharge in basins

3 486,3m³/s

Mean precip.

1 927mm/an

Mean T°

23,3°C

Moisture idx

0,22

Mean runoff

1 000mm/an

Mean elev. (basins)

578m

Watersheds crossing here

21 more basins

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

6,8%

Pesticides

1,3kg/km²

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

Protected areas3

IUCN II · 1IUCN Not Reported · 1IUCN IV · 1🌊 Marine · 1

Mengame

IUCN IV

Wildlife Sanctuary · 2008

267 km²

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN

Sub-administrations4