Ontologia

Ruisseau

鮎川

Crosses 4 administrative regions : Fujioka, Kanra, Takasaki, Yoshii

ruisseau

Total length

79km

Max discharge

1m³/s

Max Strahler

1

Segments matched

1

River geography4 admin regions · 0 communes

Parent watershed

hybas-40805737501784 km²

4 administrative regions crossed (GADM L2)

  • Fujioka
    Gunma · Japan
    23.1 km
    in this dpt
  • Yoshii
    Gunma · Japan
    0.3 km
    in this dpt
  • Kanra
    Gunma · Japan
    0.0 km
    in this dpt
  • Takasaki
    Gunma · Japan
    0.0 km
    in this dpt

4 intersecting protected areas

  • Akihata

    IUCN IV

    Prefectural Wildlife Protection Area

  • Sannako

    IUCN IV

    Prefectural Wildlife Protection Area

  • Hino

    IUCN IV

    Prefectural Wildlife Protection Area

  • Nanakoshiyama

    IUCN V

    Special green space conservation districts

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

Species present

474 distinct species · 681 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 34 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 鮎川 : 28 espèces reliées par 41 interactions GloBI sur 4 types (connectance 5.8%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
41
Connectance
0.058
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

79km

Max discharge

1,0m³/s

Max Strahler

1

Segments matched

1

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