Ontologia

Ruisseau· 5 segments

巴川

Crosses 7 administrative regions : Hokota, Ibaraki, Ishioka, Kasama, Namegata +2

ruisseau

Total length

131km

Max discharge

4m³/s

Max Strahler

3

Segments matched

5

River geography7 admin regions · 0 communes

Parent watershed

hybas-40805876801939 km²

7 administrative regions crossed (GADM L2)

  • Omitama
    Ibaraki · Japan
    14.5 km
    in this dpt
  • Hokota
    Ibaraki · Japan
    12.3 km
    in this dpt
  • Ishioka
    Ibaraki · Japan
    2.8 km
    in this dpt
  • Water body
    Ibaraki · Japan
    2.1 km
    in this dpt
  • Kasama
    Ibaraki · Japan
    0.0 km
    in this dpt
  • Ibaraki
    Ibaraki · Japan
    0.0 km
    in this dpt
  • Namegata
    Ibaraki · Japan
    0.0 km
    in this dpt

3 intersecting protected areas

  • Kitaura

    IUCN IV

    Prefectural Wildlife Protection Area

  • Hokota

    IUCN IV

    Prefectural Wildlife Protection Area

  • Noba

    IUCN IV

    Prefectural Wildlife Protection Area

1 page = 1 named river (aggregation of 5 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

119 distinct species · 146 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 16 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 巴川 : 14 espèces reliées par 15 interactions GloBI sur 4 types (connectance 12.5%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
16
Interactions affichées
15
Connectance
0.125
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

4,0m³/s

Max Strahler

3

Segments matched

5

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