Ontologia

Commune · TZA

Olkokola

Tanzania

CwbTemperate, dry winter, warm summer(100 %)

Species observed

578

Observations

4 735

Area

93,7km²

Ecological tissue

Sample of 24 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 Olkokola : 21 espèces reliées par 21 interactions GloBI sur 3 types (connectance 7.6%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
21
Connectance
0.076
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

578 distinct species · 4 735 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 735 obs · 3 cellules
Obs. / cellule
≥ 2 371
2 371–2 370
2 371–2 370
1 460–2 370
< 1 460

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

Climate

Mean T°

16,8°C

Annual rain

1 276mm

Warmest m°

24,6°C

Coldest m°

8,6°C

Elevation: 1 831 m on average (min 1 565 m, max 2 412 m)

Bioclimatic detailsExpert
Annual mean temp.
16,8°C
Annual rain
1 276mm
Warmest month
24,6°C
Coldest month
8,6°C
Mean alt.
1 831m
Min
1 565m
Max
2 412m
Std. dev.
148m
Köppen-Geiger (dominant)
CwbTemperate, dry winter, warm summer(100 %)Temperate

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

Soil & lithology

pH H₂O

7,1

Org. C

22,4g/kg

Clay

34,8%

Sand

43,0%

Silt

22,3%

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

Dominant lithology: ssGLiMaggregated to Arusha

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,0
Org. C
28,6g/kg
Clay
34,4%
Sand
43,3%
Silt
22,3%
5–15 cm
pH H₂O
7,0
Org. C
21,4g/kg
Clay
33,9%
Sand
43,7%
Silt
22,4%
15–30 cm
pH H₂O
7,1
Org. C
17,4g/kg
Clay
36,0%
Sand
41,9%
Silt
22,1%

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

Land cover

Forest17.0%
Crops27.1%
Built-up2.0%
Bare soil0.9%
Other (grassland, water…)52.9%

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

Hydrology2 basins · 0 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

4,5km

Basins crossed

2

Max stream order

2

Max drainage

4 148km²

Discharge in basins

0,4m³/s

Mean precip.

877mm/an

Mean T°

19,5°C

Moisture idx

-0,42

Mean runoff

146mm/an

Mean elev. (basins)

1 393m

Watersheds crossing here

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

Human pressure

Pop. density

3hab/km²

Night light

0,0nW

Built-up

200,6%

Pesticides

0,0kg/km²

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

Protected areas2

IUCN II · 1IUCN Not Reported · 1

Meru

IUCN Not Reported

Forest Plantation · 1967

77 km²

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