Coastline Marine Resource Development Area, designated sea area · jpn
Hiyama
- Area
- 345 km²
- IUCN cat.
- VI
- Year
- 1976
Overview
- Designation
- Coastline Marine Resource Development Area, designated sea area
- IUCN category
- VI · Aire protégée avec utilisation durable
Conservation + utilisation durable des ressources
- Established
- 1976
- Managing authority
- Hokkaido Prefecture
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
120 distinct species · 398 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Hiyama : 28 espèces reliées par 44 interactions GloBI sur 4 types (connectance 7.0%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology5 basins · 0 lakes · 16 rivers
Hydrology metrics for this exact territory
Stream length here
1,4km
Basins crossed
5
Max stream order
4
Max drainage
1 074km²
Discharge in basins
0,3m³/s
Mean precip.
1 293mm/an
Mean T°
7,6°C
Moisture idx
0,47
Max snow
39%
Mean runoff
863mm/an
Mean elev. (basins)
287m
Watersheds crossing here
Rivers / streams (16, ord ≥ 4)
- 関内川ord 2len here0.25 km4%total7 km
- 須築川ord 2len here0.22 km2%total9 km
- 湯の尻川ord 1len here0.18 km15%total1 km
- 臼別川ord 2len here0.16 km1%total13 km
- 鮪歌三ツ谷川ord 1len here0.13 km7%total2 km
- 小坂岱川ord 2len here0.12 km2%total6 km
- 良瑠石川ord 1len here0.09 km2%total5 km
- 島歌川ord 1len here0.07 km3%total2 km
- 目名川ord 2len here0.05 km0%total14 km
- 椴川ord 1len here0.04 km1%total7 km
- 石崎川ord 3len here0.04 km0%total18 km
- 切梶川ord 1len here0.04 km1%total3 km
4 more river segmentssorted by Strahler order + length
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
- 42.12516, 139.95769
- 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.