Oarai
IUCN VPrefectural Natural Park · 1951
22 km²
Town · JPN
Ibaraki
Japan
CfaTemperate, no dry season, hot summer(100 %)
Species observed
181
Observations
244
Area
110,7km²
Ecological tissue
Sample of 35 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 Ibaraki : 33 espèces reliées par 28 interactions GloBI sur 4 types (connectance 4.4%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
36
Interactions affichées
28
Connectance
0.044
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
181 distinct species · 244 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
14,9°C
Annual rain
1 396mm
Warmest m°
27,7°C
Coldest m°
1,4°C
Elevation: 23 m on average (min -1 m, max 32 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
14,9°C
Annual rain
1 396mm
Warmest month
27,7°C
Coldest month
1,4°C
Mean alt.
23m
Min
-1m
Max
32m
Std. dev.
8m
Köppen-Geiger (dominant)
CfaTemperate, no dry season, hot summer(100 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
5,9
Org. C
41,5g/kg
Clay
23,2%
Sand
42,4%
Silt
34,4%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,8
Org. C
57,3g/kg
Clay
23,0%
Sand
42,7%
Silt
34,4%
5–15 cm
pH H₂O
5,9
Org. C
40,2g/kg
Clay
23,2%
Sand
42,4%
Silt
34,4%
15–30 cm
pH H₂O
6,0
Org. C
26,9g/kg
Clay
23,4%
Sand
42,3%
Silt
34,4%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest23.7%
Crops21.1%
Built-up5.6%
Bare soil1.6%
Other (grassland, water…)48.0%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology3 basins · 1 lakes · 13 rivers
Hydrology metrics for this exact territory
Stream length here
38,4km
Lake surface here
0,00km²
Basins crossed
3
Max stream order
3
Max drainage
2 828km²
Discharge in basins
2,4m³/s
Mean precip.
1 382mm/an
Mean T°
13,5°C
Moisture idx
0,27
Max snow
5%
Mean runoff
657mm/an
Mean elev. (basins)
62m
Watersheds crossing here
Lakes (1, top by area)
Rivers / streams (13, ord ≥ 4)
- 枝折川ord 3len here7.81 km65%total12 km
- 寛政川ord 2len here6.53 km100%total7 km
- 赤穂川ord 2len here4.01 km99%total4 km
- 涸沼川ord 3len here3.41 km8%total44 km
- 黒川ord 3len here2.89 km4%total71 km
- 涸沼前川ord 2len here2.79 km24%total12 km
- 逆川ord 3len here2.28 km9%total25 km
- 小橋川ord 2len here2.19 km100%total2 km
- 渋川ord 1len here1.90 km71%total3 km
- 若宮川ord 1len here1.82 km43%total4 km
- 古矢川ord 2len here1.52 km15%total10 km
- 石川川ord 1len here1.03 km18%total6 km
1 more river segmentssorted by Strahler order + length
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
2hab/km²
Night light
2,4nW
Built-up
559,0%
Pesticides
104,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas5
IUCN V · 3IUCN IV · 2🌊 Marine · 1
Hinuma
IUCN IVNational Wildlife Protection Area · 2014
21 km²
Hinuma
IUCN IVWetland of International Importance (Ramsar Site) · 2015
10 km²
Obata jouato
IUCN VGreen Space Environment Conservation Area(Ibaraki) · 1985
0 km²
Yazure
IUCN VGreen Space Environment Conservation Area(Ibaraki) · 1985
0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN