Ontologia

Ruisseau· 6 segments

飯沼川

Crosses 7 administrative regions : Bandō, Jōsō, Koga, Noda, Shimotsuma +2

ruisseau

Total length

51km

Max discharge

2,3m³/s

Max Strahler

2

Segments matched

6

River geography7 admin regions · 0 communes

Parent watershed

hybas-4080583020349 km²

7 administrative regions crossed (GADM L2)

  • Bandō
    Ibaraki · Japan
    15.4 km
    in this dpt
  • Koga
    Ibaraki · Japan
    10.9 km
    in this dpt
  • Jōsō
    Ibaraki · Japan
    10.2 km
    in this dpt
  • Yachiyo
    Ibaraki · Japan
    6.7 km
    in this dpt
  • Yūki
    Ibaraki · Japan
    2.6 km
    in this dpt
  • Noda
    Chiba · Japan
    0.4 km
    in this dpt
  • Shimotsuma
    Ibaraki · Japan
    0.0 km
    in this dpt

7 intersecting protected areas

  • Sugaonuma

    IUCN IV

    Prefectural Wildlife Protection Area

  • Yachiyo

    IUCN IV

    Prefectural Wildlife Protection Area

  • Sashima

    IUCN IV

    Prefectural Wildlife Protection Area

  • Sanwa

    IUCN IV

    Prefectural Wildlife Protection Area

  • Sugao numa

    IUCN V

    Prefectural Nature Conservation Area

  • Sakaijoato koen

    IUCN IV

    Prefectural Wildlife Protection Area

  • Sakasai jouseki

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

1 page = 1 named river (aggregation of 6 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

33 distinct species · 52 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 12 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 飯沼川 : 10 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 11 interactions GloBI sur 4 types (connectance 16.7%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
12
Interactions affichées
11
Connectance
0.167
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

51km

Max discharge

2,3m³/s

Max Strahler

2

Segments matched

6

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