Ontologia

Ruisseau· 5 segments

小渋川

Crosses 2 administrative regions : Iida, Ōshika

ruisseau

Total length

28km

Max discharge

4,9m³/s

Max Strahler

2

Segments matched

5

River geography2 admin regions · 0 communes

Parent watershed

hybas-40806055901756 km²

2 administrative regions crossed (GADM L2)

  • Ōshika
    Nagano · Japan
    11.5 km
    in this dpt
  • Iida
    Nagano · Japan
    0.0 km
    in this dpt

7 intersecting protected areas

1 page = 1 named river (aggregation of 5 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

460 distinct species · 926 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 4 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 小渋川 : 4 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 2 interactions GloBI sur 1 type (connectance 33.3%, filtre Serrano α=0.2).

Espèces affichées
4
Interactions affichées
2
Connectance
0.333
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)

Total length

28km

Max discharge

4,9m³/s

Max Strahler

2

Segments matched

5

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.