Ontologia

Rivière· 22 segments

玉川

Crosses 2 administrative regions : Daisen, Semboku

rivière

Total length

296km

Max discharge

37,8m³/s

Max Strahler

4

Segments matched

22

River geography2 admin regions · 0 communes

Parent watershed

hybas-4080470750694 km²

2 administrative regions crossed (GADM L2)

  • Semboku
    Akita · Japan
    64.1 km
    in this dpt
  • Daisen
    Akita · Japan
    15.0 km
    in this dpt

13 intersecting protected areas

4 more protected areas

  • Uguisuno

    IUCN IV

    Prefectural Wildlife Protection Area

  • Yaotome

    IUCN IV

    Prefectural Wildlife Protection Area

  • Natsuse Hiba

    IUCN IV

    Rare Population Protected Forest

  • Tamachiyama

    IUCN V

    Special green space conservation districts

1 page = 1 named river (aggregation of 22 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

145 distinct species · 209 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 35 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 玉川 : 30 espèces reliées par 43 interactions GloBI sur 4 types (connectance 6.8%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
43
Connectance
0.068
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

296km

Max discharge

37,8m³/s

Max Strahler

4

Segments matched

22

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