Ontologia

Rivière· 32 segments

犀川

Crosses 9 administrative regions : Azumino, Chikuhoku, Ikeda, Ikusaka, Matsumoto +4

rivière

Total length

183km

Max discharge

124,4m³/s

Max Strahler

5

Segments matched

32

River geography9 admin regions · 0 communes

Parent watershed

hybas-4080562440680 km²

9 administrative regions crossed (GADM L2)

  • Nagano
    Nagano · Japan
    22.1 km
    in this dpt
  • Shinshūshin
    Nagano · Japan
    13.1 km
    in this dpt
  • Azumino
    Nagano · Japan
    11.9 km
    in this dpt
  • Ikusaka
    Nagano · Japan
    8.6 km
    in this dpt
  • Ōmachi
    Nagano · Japan
    6.9 km
    in this dpt
  • Nakajō
    Nagano · Japan
    1.1 km
    in this dpt
  • Chikuhoku
    Nagano · Japan
    0.4 km
    in this dpt
  • Ikeda
    Nagano · Japan
    0.4 km
    in this dpt
  • Matsumoto
    Nagano · Japan
    0.0 km
    in this dpt

1 intersecting protected areas

1 page = 1 named river (aggregation of 32 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

279 distinct species · 538 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 18 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 犀川 : 15 espèces reliées par 17 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
18
Interactions affichées
17
Connectance
0.111
Patrimoniales
0
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

183km

Max discharge

124,4m³/s

Max Strahler

5

Segments matched

32

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