Rivière· 3 segments
相川
Crosses 2 administrative regions : Hitachiōmiya, Shirosato
Total length
117km
Max discharge
53,4m³/s
Max Strahler
5
Segments matched
3
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- HitachiōmiyaIbaraki · Japan8.3 kmin this dpt
- ShirosatoIbaraki · Japan0.1 kmin this dpt
2 intersecting protected areas
Gozen yama
IUCN VPrefectural Natural Park
Gozenyama
IUCN IVPrefectural Wildlife Protection Area
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
277 distinct species · 378 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 相川 : 41 espèces reliées par 46 interactions GloBI sur 5 types (connectance 4.4%, filtre Serrano α=0.2). 5 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
117km
Max discharge
53,4m³/s
Max Strahler
5
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.