Ontologia

Commune · IDN

Alasa

Indonesia

AfTropical, rainforest(100 %)

Species observed

3

Observations

11

Area

197,5km²

Partial data for this territory

Few observations recorded here. Real biodiversity is likely richer.

Ecological tissue

Not enough documented interactions to build a meaningful graph for this territory.

Species present

3 distinct species · 11 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

11 obs · 2 cellules
Obs. / cellule
≥ 6
6–5
6–5
6–5
< 6

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

Climate

Mean T°

26,8°C

Annual rain

2 924mm

Warmest m°

28,8°C

Coldest m°

24,2°C

Elevation: 72 m on average (min -8 m, max 199 m)

Bioclimatic detailsExpert
Annual mean temp.
26,8°C
Annual rain
2 924mm
Warmest month
28,8°C
Coldest month
24,2°C
Mean alt.
72m
Min
-8m
Max
199m
Std. dev.
55m
Köppen-Geiger (dominant)
AfTropical, rainforest(100 %)Tropical

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

Soil & lithology

pH H₂O

4,9

Org. C

84,3g/kg

Clay

37,2%

Sand

30,5%

Silt

32,3%

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

Dominant lithology: smGLiMaggregated to Nias Utara

3 soil depths detailedExpert
0–5 cm
pH H₂O
4,8
Org. C
97,0g/kg
Clay
35,8%
Sand
31,5%
Silt
32,8%
5–15 cm
pH H₂O
4,9
Org. C
70,9g/kg
Clay
36,2%
Sand
30,9%
Silt
32,8%
15–30 cm
pH H₂O
4,9
Org. C
85,1g/kg
Clay
39,7%
Sand
29,0%
Silt
31,3%

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

Land cover

Forest88.5%
Crops0.5%
Built-up0.2%
Bare soil0.1%
Other (grassland, water…)10.7%

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

Hydrology3 basins · 0 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

39,7km

Basins crossed

3

Max stream order

4

Max drainage

508km²

Discharge in basins

6,2m³/s

Mean precip.

3 215mm/an

Mean T°

26,3°C

Moisture idx

0,47

Mean runoff

1 496mm/an

Mean elev. (basins)

108m

Watersheds crossing here

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

Human pressure

Pop. density

1hab/km²

Night light

0,0nW

Built-up

17,9%

Pesticides

0,7kg/km²

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

Sub-administrations14