Ontologia

Regency · IDN

Samosir

Indonesia

AfTropical, rainforest(70 %)

Species observed

555

Observations

1 441

Area

1 237,3km²

Ecological tissue

Sample of 41 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 Samosir : 35 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 4 types (connectance 4.4%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
38
Connectance
0.044
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

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

Species present

555 distinct species · 1 441 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 441 obs · 17 cellules
Obs. / cellule
≥ 334
330–333
77–329
11–76
< 11

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

Climate

Mean T°

19,7°C

Annual rain

2 700mm

Warmest m°

23,2°C

Coldest m°

15,8°C

Elevation: 1 392 m on average (min 901 m, max 1 982 m)

Bioclimatic detailsExpert
Annual mean temp.
19,7°C
Annual rain
2 700mm
Warmest month
23,2°C
Coldest month
15,8°C
Mean alt.
1 392m
Min
901m
Max
1 982m
Std. dev.
309m
Köppen-Geiger (dominant)
AfTropical, rainforest(70 %)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

61,1g/kg

Clay

34,7%

Sand

36,0%

Silt

29,2%

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

Dominant lithology: viGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,1
Org. C
81,9g/kg
Clay
35,0%
Sand
35,8%
Silt
29,2%
5–15 cm
pH H₂O
5,1
Org. C
65,1g/kg
Clay
34,4%
Sand
36,2%
Silt
29,5%
15–30 cm
pH H₂O
5,1
Org. C
36,4g/kg
Clay
34,8%
Sand
36,2%
Silt
29,0%

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

Land cover

Forest56.9%
Crops13.9%
Built-up0.4%
Bare soil0.3%
Other (grassland, water…)28.4%

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

Hydrology6 basins · 2 lakes · 7 rivers

Hydrology metrics for this exact territory

Stream length here

48,8km

Lake surface here

7,03km²

Basins crossed

6

Max stream order

3

Max drainage

2 454km²

Discharge in basins

49,0m³/s

Mean precip.

2 273mm/an

Mean T°

20,4°C

Moisture idx

0,34

Mean runoff

1 166mm/an

Mean elev. (basins)

1 175m

Watersheds crossing here

Lakes (2, top by area)

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

Human pressure

Pop. density

1hab/km²

Night light

0,0nW

Built-up

40,1%

Pesticides

0,6kg/km²

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

Sub-administrations39