Ontologia

Rivière· 28 segments

赤川

Crosses 3 administrative regions : Mikawa, Sakata, Tsuruoka

rivière

Total length

339km

Max discharge

35,4m³/s

Max Strahler

4

Segments matched

28

River geography3 admin regions · 0 communes

Parent watershed

hybas-4080043370878 km²

3 administrative regions crossed (GADM L2)

  • Tsuruoka
    Yamagata · Japan
    66.3 km
    in this dpt
  • Mikawa
    Yamagata · Japan
    8.2 km
    in this dpt
  • Sakata
    Yamagata · Japan
    4.3 km
    in this dpt

7 intersecting protected areas

1 page = 1 named river (aggregation of 28 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

47 distinct species · 85 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 8 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 赤川 : 7 espèces reliées par 8 interactions GloBI sur 2 types (connectance 17.8%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
10
Interactions affichées
8
Connectance
0.178
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

339km

Max discharge

35,4m³/s

Max Strahler

4

Segments matched

28

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