Ruisseau· 3 segments
大石沢
Crosses 3 administrative regions : Iwate, Nishiwaga, Shizukuishi
Total length
37km
Max discharge
17m³/s
Max Strahler
3
Segments matched
3
River geography3 admin regions · 0 communes
3 administrative regions crossed (GADM L2)
- IwateIwate · Japan5.8 kmin this dpt
- NishiwagaIwate · Japan1.8 kmin this dpt
- ShizukuishiIwate · Japan0.7 kmin this dpt
6 intersecting protected areas
Towada hachimantai
IUCN IINational Park
Hachimantai
IUCN IVPrefectural Wildlife Protection Area
Forest Ecosystem Reserve
Iwate machi
IUCN IVPrefectural Wildlife Protection Area
Yuda Onsenkyo
IUCN VPrefectural Natural Park
Yuda dam
IUCN IVPrefectural Wildlife Protection Area
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
157 distinct species · 2 250 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 大石沢 : 23 espèces reliées par 43 interactions GloBI sur 3 types (connectance 8.7%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
37km
Max discharge
17,0m³/s
Max Strahler
3
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.