Ontologia

Rivière· 30 segments

関川

Crosses 3 administrative regions : Jōetsu, Myōkō, Shinano

rivière

Total length

131km

Max discharge

51,9m³/s

Max Strahler

4

Segments matched

30

River geography3 admin regions · 0 communes

Parent watershed

hybas-4080043080803 km²

3 administrative regions crossed (GADM L2)

  • Myōkō
    Niigata · Japan
    35.8 km
    in this dpt
  • Jōetsu
    Niigata · Japan
    16.1 km
    in this dpt
  • Shinano
    Nagano · Japan
    0.5 km
    in this dpt

5 intersecting protected areas

1 page = 1 named river (aggregation of 30 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

133 distinct species · 167 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 44 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 関川 : 37 espèces reliées par 52 interactions GloBI sur 5 types (connectance 5.5%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
44
Interactions affichées
52
Connectance
0.055
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

131km

Max discharge

51,9m³/s

Max Strahler

4

Segments matched

30

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