Ontologia

Commune · CMR

Demsa

Cameroon

AwTropical, savannah(100 %)

Species observed

572

Observations

2 309

Area

734,8km²

Ecological tissue

Sample of 7 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 Demsa : 5 espèces reliées par 6 interactions GloBI sur 2 types (connectance 21.4%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
8
Interactions affichées
6
Connectance
0.214
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

572 distinct species · 2 309 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 309 obs · 19 cellules
Obs. / cellule
≥ 1 168
339–1 167
89–338
16–88
< 16

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

Climate

Mean T°

28,1°C

Annual rain

1 007mm

Warmest m°

39,0°C

Coldest m°

17,8°C

Elevation: 304 m on average (min 179 m, max 511 m)

Bioclimatic detailsExpert
Annual mean temp.
28,1°C
Annual rain
1 007mm
Warmest month
39,0°C
Coldest month
17,8°C
Mean alt.
304m
Min
179m
Max
511m
Std. dev.
60m
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

6,9

Org. C

12,2g/kg

Clay

22,3%

Sand

55,2%

Silt

22,4%

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

Dominant lithology: ssGLiMaggregated to Bénoué

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,8
Org. C
19,0g/kg
Clay
20,5%
Sand
56,2%
Silt
23,3%
5–15 cm
pH H₂O
6,9
Org. C
11,6g/kg
Clay
21,2%
Sand
56,4%
Silt
22,4%
15–30 cm
pH H₂O
6,9
Org. C
6,1g/kg
Clay
25,3%
Sand
53,2%
Silt
21,5%

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

Land cover

Forest12.2%
Crops32.9%
Built-up0.4%
Bare soil0.4%
Other (grassland, water…)54.0%

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

Hydrology4 basins · 1 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

1,7km

Lake surface here

0,12km²

Basins crossed

4

Max stream order

4

Max drainage

65 747km²

Discharge in basins

88,7m³/s

Mean precip.

983mm/an

Mean T°

27,1°C

Moisture idx

-0,50

Mean runoff

183mm/an

Mean elev. (basins)

346m

Watersheds crossing here

Lakes (1, top by area)

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

Human pressure

Pop. density

1hab/km²

Night light

0,1nW

Built-up

40,0%

Pesticides

6,3kg/km²

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