Ontologia

Ruisseau· 5 segments

江川

Crosses 13 administrative regions : Fujioka, Inba, Iwafune, Kaminokawa, Kawachi +8

ruisseau

Total length

242km

Max discharge

3,9m³/s

Max Strahler

2

Segments matched

5

River geography13 admin regions · 0 communes

Parent watershed

hybas-40805877801458 km²

13 administrative regions crossed (GADM L2)

  • Ryūgasaki
    Ibaraki · Japan
    12.0 km
    in this dpt
  • Kaminokawa
    Tochigi · Japan
    5.3 km
    in this dpt
  • Narita
    Chiba · Japan
    4.6 km
    in this dpt
  • Iwafune
    Tochigi · Japan
    3.7 km
    in this dpt
  • Fujioka
    Tochigi · Japan
    3.4 km
    in this dpt
  • Kawachi
    Ibaraki · Japan
    2.6 km
    in this dpt
  • Inba
    Chiba · Japan
    0.5 km
    in this dpt
  • Tsukuba
    Ibaraki · Japan
    0.1 km
    in this dpt
  • Ushiku
    Ibaraki · Japan
    0.0 km
    in this dpt
  • Tsukubamirai
    Ibaraki · Japan
    0.0 km
    in this dpt
  • Tomisato
    Chiba · Japan
    0.0 km
    in this dpt
  • Shisui
    Chiba · Japan
    0.0 km
    in this dpt
  • Mōka
    Tochigi · Japan
    0.0 km
    in this dpt

8 intersecting protected areas

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

Species present

152 distinct species · 257 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 43 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 江川 : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 65 interactions GloBI sur 5 types (connectance 7.2%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
43
Interactions affichées
65
Connectance
0.072
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

242km

Max discharge

3,9m³/s

Max Strahler

2

Segments matched

5

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