Ontologia

Prefecture · jpn

Gunma

Japan

CfaTemperate, no dry season, hot summer(41 %)

Species observed

7 066

Observations

135 916

Area

6 369,2km²

Ecological tissue

Sample of 33 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 Gunma : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 51 interactions GloBI sur 2 types (connectance 9.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
51
Connectance
0.091
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

7 066 distinct species · 135 916 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

135 916 obs · 189 cellules
Obs. / cellule
≥ 3 505
1 517–3 504
747–1 516
527–746
< 527

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

Climate

Mean T°

10,4°C

Annual rain

1 656mm

Warmest m°

25,5°C

Coldest m°

-6,8°C

Elevation: 759 m on average (min 13 m, max 2 299 m)

Bioclimatic detailsExpert
Annual mean temp.
10,4°C
Annual rain
1 656mm
Warmest month
25,5°C
Coldest month
-6,8°C
Mean alt.
759m
Min
13m
Max
2 299m
Std. dev.
494m
Köppen-Geiger (dominant)
CfaTemperate, no dry season, hot summer(41 %)Temperate

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

Soil & lithology

pH H₂O

5,3

Org. C

62,7g/kg

Clay

27,4%

Sand

38,2%

Silt

34,3%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,3
Org. C
92,3g/kg
Clay
27,2%
Sand
38,2%
Silt
34,7%
5–15 cm
pH H₂O
5,3
Org. C
60,9g/kg
Clay
27,6%
Sand
37,9%
Silt
34,5%
15–30 cm
pH H₂O
5,3
Org. C
35,0g/kg
Clay
27,6%
Sand
38,6%
Silt
33,9%

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

Land cover

Forest64.9%
Crops5.4%
Built-up3.5%
Bare soil0.4%
Other (grassland, water…)25.8%

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

Hydrology22 basins · 27 lakes · 100 rivers

Hydrology metrics for this exact territory

Stream length here

1 411,1km

Lake surface here

21,70km²

Basins crossed

22

Max stream order

5

Max drainage

8 214km²

Discharge in basins

299,5m³/s

Mean precip.

1 516mm/an

Mean T°

10,0°C

Moisture idx

0,35

Max snow

46%

Mean runoff

688mm/an

Mean elev. (basins)

744m

Watersheds crossing here

13 more basins

Lakes (27, top by area)

18 more lakes

Rivers / streams (100, ord ≥ 4)

88 more river segments

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

Human pressure

Pop. density

2hab/km²

Night light

1,4nW

Built-up

345,4%

Pesticides

93,7kg/km²

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

Protected areas100

IUCN IV · 62IUCN V · 23IUCN II · 4IUCN Ib · 4IUCN Not Applicable · 4IUCN Not Reported · 2IUCN III · 1📍 Point sites · 1

Nikko

IUCN V

National Park · 2008

1 159 km²

Okuaizu

IUCN Ib

Forest Ecosystem Reserve · 2007

862 km²

Minakami

IUCN Not Applicable

UNESCO-MAB Biosphere Reserve · 2017

703 km²

Complete list

+ 40 protected areas (top 60 shown)

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

Sub-administrations38