Ontologia

City · JPN

Saku

Japan

DfaCold, no dry season, hot summer(78 %)

Species observed

1 747

Observations

18 249

Area

423,9km²

Ecological tissue

Sample of 29 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 Saku : 18 espèces reliées par 64 interactions GloBI sur 2 types (connectance 12.9%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
64
Connectance
0.129
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

1 747 distinct species · 18 249 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

18 249 obs · 14 cellules
Obs. / cellule
≥ 8 492
3 042–8 491
575–3 041
538–574
< 538

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

Climate

Mean T°

10,3°C

Annual rain

1 128mm

Warmest m°

26,3°C

Coldest m°

-8,4°C

Elevation: 948 m on average (min 638 m, max 2 201 m)

Bioclimatic detailsExpert
Annual mean temp.
10,3°C
Annual rain
1 128mm
Warmest month
26,3°C
Coldest month
-8,4°C
Mean alt.
948m
Min
638m
Max
2 201m
Std. dev.
264m
Köppen-Geiger (dominant)
DfaCold, no dry season, hot summer(78 %)Cold

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

Soil & lithology

pH H₂O

5,7

Org. C

50,3g/kg

Clay

27,6%

Sand

35,1%

Silt

37,4%

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

Dominant lithology: suGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,7
Org. C
79,3g/kg
Clay
26,9%
Sand
35,4%
Silt
37,7%
5–15 cm
pH H₂O
5,7
Org. C
45,8g/kg
Clay
27,5%
Sand
35,0%
Silt
37,6%
15–30 cm
pH H₂O
5,8
Org. C
25,9g/kg
Clay
28,3%
Sand
34,8%
Silt
36,8%

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

Land cover

Forest63.1%
Crops7.1%
Built-up2.7%
Bare soil0.4%
Other (grassland, water…)26.6%

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

Hydrology3 basins · 0 lakes · 24 rivers

Hydrology metrics for this exact territory

Stream length here

170,2km

Basins crossed

3

Max stream order

4

Max drainage

1 784km²

Discharge in basins

10,7m³/s

Mean precip.

1 461mm/an

Mean T°

7,8°C

Moisture idx

0,35

Max snow

12%

Mean runoff

858mm/an

Mean elev. (basins)

1 160m

Watersheds crossing here

Rivers / streams (24, ord ≥ 4)

12 more river segments

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

Human pressure

Pop. density

2hab/km²

Night light

0,8nW

Built-up

273,2%

Pesticides

92,5kg/km²

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

Protected areas14

IUCN IV · 9IUCN V · 5

Kasuga

IUCN IV

Prefectural Wildlife Protection Area · 2005

18 km²

Omagari

IUCN IV

Prefectural Wildlife Protection Area · 2022

7 km²

Kozu

IUCN IV

Prefectural Wildlife Protection Area · 2015

4 km²

Complete list

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