Ontologia

Regency · IDN

Simalungun

Indonesia

AfTropical, rainforest(100 %)

Species observed

1 185

Observations

2 836

Area

4 400,4km²

Ecological tissue

Sample of 22 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 Simalungun : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 19 interactions GloBI sur 2 types (connectance 8.2%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
22
Interactions affichées
19
Connectance
0.082
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

1 185 distinct species · 2 836 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 836 obs · 86 cellules
Obs. / cellule
≥ 506
51–505
15–50
10–14
< 10

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

Climate

Mean T°

23,9°C

Annual rain

2 900mm

Warmest m°

27,8°C

Coldest m°

19,5°C

Elevation: 561 m on average (min 11 m, max 1 853 m)

Bioclimatic detailsExpert
Annual mean temp.
23,9°C
Annual rain
2 900mm
Warmest month
27,8°C
Coldest month
19,5°C
Mean alt.
561m
Min
11m
Max
1 853m
Std. dev.
461m
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

5,0

Org. C

50,0g/kg

Clay

34,9%

Sand

35,3%

Silt

29,7%

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

Dominant lithology: viGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,0
Org. C
65,0g/kg
Clay
34,2%
Sand
35,9%
Silt
29,9%
5–15 cm
pH H₂O
5,0
Org. C
48,8g/kg
Clay
35,0%
Sand
35,2%
Silt
29,8%
15–30 cm
pH H₂O
5,0
Org. C
36,3g/kg
Clay
35,6%
Sand
34,9%
Silt
29,5%

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

Land cover

Forest72.4%
Crops7.0%
Built-up0.7%
Bare soil0.1%
Other (grassland, water…)19.8%

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

Hydrology10 basins · 2 lakes · 21 rivers

Hydrology metrics for this exact territory

Stream length here

464,8km

Lake surface here

21,31km²

Basins crossed

10

Max stream order

5

Max drainage

1 719km²

Discharge in basins

134,9m³/s

Mean precip.

2 403mm/an

Mean T°

24,3°C

Moisture idx

0,32

Mean runoff

1 212mm/an

Mean elev. (basins)

461m

Watersheds crossing here

1 more basins

Lakes (2, top by area)

Rivers / streams (21, ord ≥ 4)

9 more river segments

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

Human pressure

Pop. density

1hab/km²

Night light

0,2nW

Built-up

70,4%

Pesticides

0,6kg/km²

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

Protected areas5

IUCN II · 2IUCN Ia · 1IUCN III · 1IUCN Not Reported · 1🌊 Marine · 1

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

Sub-administrations85