Forest Ecosystem Reserve · jpn
Okuaizu
- Area
- 862 km²
- IUCN cat.
- Ib
- Year
- 2007
Overview
- Designation
- Forest Ecosystem Reserve
- IUCN category
- Ib · Zone de nature sauvage
Aire protégée pour la wilderness, faible accès humain
- Established
- 2007
- Managing authority
- Forestry Agency of Japan
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
1 081 distinct species · 4 301 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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).
Indicateurs du tissu écologique
Tissu écologique de Okuaizu : 29 espèces reliées par 44 interactions GloBI sur 6 types (connectance 5.4%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology9 basins · 4 lakes · 78 rivers
Hydrology metrics for this exact territory
Stream length here
205,8km
Lake surface here
0,22km²
Basins crossed
9
Max stream order
5
Max drainage
2 786km²
Discharge in basins
46,4m³/s
Mean precip.
1 878mm/an
Mean T°
7,8°C
Moisture idx
0,56
Max snow
46%
Mean runoff
1 106mm/an
Mean elev. (basins)
988m
Watersheds crossing here
- Bassin de 只見川sub-area759,8 km²overlap391.11 km²45%
- Bassin de 伊南川sub-area1 046,7 km²overlap259.21 km²30%
- Bassin de 只見川sub-area979,3 km²overlap201.89 km²23%
- Bassin de 常浪川sub-area383,8 km²overlap3.13 km²0%
- Bassin de 鬼怒川sub-area318,9 km²overlap2.11 km²0%
- Bassin de 破間川sub-area1 507,4 km²overlap1.59 km²0%
- Bassin de 信濃川sub-area1 611,6 km²overlap1.35 km²0%
- Bassin de 男鹿川sub-area289,2 km²overlap1.11 km²0%
- Bassin de 片品川sub-area682,3 km²overlap0.33 km²0%
Lakes (4, top by area)
Rivers / streams (78, ord ≥ 4)
- 只見川ord 5len here15.12 km16%total95 km
- 白戸川ord 2len here11.30 km67%total17 km
- 大津岐川ord 3len here10.19 km90%total11 km
- 袖沢ord 2len here8.88 km96%total9 km
- 大幽沢ord 2len here8.87 km99%total9 km
- 西の沢ord 1len here7.08 km100%total7 km
- 叶津川ord 3len here6.96 km44%total16 km
- ミノコクリ沢ord 2len here6.21 km94%total7 km
- 東の沢ord 1len here6.15 km97%total6 km
- 実川ord 3len here5.77 km19%total31 km
- 滝沢川ord 2len here5.30 km47%total11 km
- 洗戸沢ord 1len here5.11 km100%total5 km
66 more river segmentssorted by Strahler order + length
- 滝沢ord 3len here4.65 km83%total6 km
- 蒲生川ord 2len here4.55 km33%total14 km
- 片貝沢ord 1len here3.88 km76%total5 km
- 小手沢ord 2len here3.86 km100%total4 km
- トクサ沢ord 3len here3.55 km55%total7 km
- 新道沢ord 2len here3.40 km66%total5 km
- 沼尻川ord 1len here3.26 km42%total8 km
- 西実沢ord 2len here3.15 km100%total3 km
- 南沢ord 1len here3.14 km92%total3 km
- 御神楽沢ord 1len here3.14 km100%total3 km
- 伊南川ord 4len here3.05 km5%total58 km
- 斧尻与作沢ord 3len here3.05 km63%total5 km
- 大杉沢ord 1len here2.93 km94%total3 km
- 大熊沢ord 1len here2.83 km78%total4 km
- 広河原沢ord 3len here2.81 km89%total3 km
- 北沢ord 1len here2.72 km100%total3 km
- モチツボ沢ord 2len here2.65 km57%total5 km
- 大白沢ord 2len here2.57 km38%total7 km
- 塩の岐川ord 1len here2.54 km42%total6 km
- 矢櫃沢ord 2len here2.43 km65%total4 km
- 只見沢ord 1len here2.36 km48%total5 km
- 赤崩沢ord 1len here2.25 km100%total2 km
- 吸沢ord 5len here2.16 km54%total4 km
- 霧来沢川ord 2len here2.10 km24%total9 km
- 楢戸川ord 1len here1.98 km19%total11 km
- 保太橋沢ord 1len here1.66 km90%total2 km
- 大石田沢ord 1len here1.60 km61%total3 km
- 島太郎沢ord 1len here1.53 km76%total2 km
- 押倉沢ord 1len here1.51 km100%total2 km
- 大ヨッピ川ord 1len here1.48 km100%total1 km
- 大鍋又沢ord 1len here1.38 km58%total2 km
- 下大戸沢ord 1len here1.36 km57%total2 km
- 川原井戸沢ord 1len here1.34 km54%total2 km
- ミチギノ沢ord 1len here1.30 km100%total1 km
- 太田川ord 2len here1.28 km6%total20 km
- 一ノ沢川ord 3len here1.26 km65%total2 km
- 塩沢川ord 3len here1.20 km16%total7 km
- 宿の沢ord 4len here1.18 km48%total2 km
- 山入川ord 2len here1.13 km16%total7 km
- 小幽沢川ord 3len here1.08 km28%total4 km
- 梯子沢ord 1len here1.06 km100%total1 km
- 大三本沢ord 2len here1.03 km26%total4 km
- 高石沢ord 3len here1.02 km101%total1 km
- 下ノ沢ord 1len here1.01 km54%total2 km
- 渡沢ord 1len here0.94 km26%total4 km
- 黒沢ord 1len here0.92 km32%total3 km
- 西ノ沢ord 1len here0.89 km100%total1 km
- 稲子沢ord 1len here0.85 km96%total1 km
- 前沢ord 1len here0.73 km40%total2 km
- 餅井戸沢ord 1len here0.71 km25%total3 km
- 小ヨッピ沢ord 1len here0.69 km101%total1 km
- 赤安沢ord 1len here0.69 km101%total1 km
- 白沢川ord 1len here0.53 km10%total5 km
- 黒谷川ord 4len here0.48 km5%total10 km
- 八木沢ord 1len here0.38 km20%total2 km
- 焼沢ord 1len here0.36 km13%total3 km
- 風来沢川ord 2len here0.32 km6%total6 km
- トヤス沢ord 1len here0.32 km12%total3 km
- 柴倉沢ord 5len here0.28 km6%total5 km
- 小戸沢ord 2len here0.17 km6%total3 km
- 上米子川ord 2len here0.10 km6%total2 km
- 鱒沢川ord 2len here0.03 km0%total6 km
- 糸沢ord 5len here0.03 km0%total9 km
- 真奈川ord 1len here≈ tangenttotal4 km
- 北の湖沢ord 1len here≈ tangenttotal1 km
- 野尻川ord 3len here≈ tangenttotal18 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 37.11140, 139.37058
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.