Ontologia

Ruisseau· 3 segments

山田川

Crosses 9 administrative regions : Ikoma, Kizugawa, Kohoku, Kusatsu, Nagahama +4

ruisseau

Total length

617km

Max discharge

0,9m³/s

Max Strahler

2

Segments matched

3

River geography9 admin regions · 0 communes

Parent watershed

hybas-4080618350819 km²

9 administrative regions crossed (GADM L2)

  • Rittō
    Shiga · Japan
    7.9 km
    in this dpt
  • Seika
    Kyoto · Japan
    2.8 km
    in this dpt
  • Kohoku
    Shiga · Japan
    2.4 km
    in this dpt
  • Kizugawa
    Kyoto · Japan
    2.1 km
    in this dpt
  • Kusatsu
    Shiga · Japan
    1.6 km
    in this dpt
  • Takatsuki
    Shiga · Japan
    0.7 km
    in this dpt
  • Ikoma
    Nara · Japan
    0.6 km
    in this dpt
  • Nara
    Nara · Japan
    0.0 km
    in this dpt
  • Nagahama
    Shiga · Japan
    0.0 km
    in this dpt

3 intersecting protected areas

1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

187 distinct species · 1 029 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 31 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 山田川 : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 8.3%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
44
Connectance
0.083
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

617km

Max discharge

0,9m³/s

Max Strahler

2

Segments matched

3

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