Ontologia

Ruisseau· 10 segments

黒川

Crosses 9 administrative regions : Ibaraki, Kanuma, Mibu, Nikkō, Nishikata +4

ruisseau

Total length

445km

Max discharge

4,2m³/s

Max Strahler

3

Segments matched

10

River geography9 admin regions · 0 communes

Parent watershed

hybas-40805775402572 km²

9 administrative regions crossed (GADM L2)

  • Kanuma
    Tochigi · Japan
    30.4 km
    in this dpt
  • Mibu
    Tochigi · Japan
    17.1 km
    in this dpt
  • Nikkō
    Tochigi · Japan
    12.3 km
    in this dpt
  • Ueno
    Gunma · Japan
    4.8 km
    in this dpt
  • Ibaraki
    Ibaraki · Japan
    2.9 km
    in this dpt
  • Omitama
    Ibaraki · Japan
    2.3 km
    in this dpt
  • Tochigi
    Tochigi · Japan
    0.9 km
    in this dpt
  • Nishikata
    Tochigi · Japan
    0.0 km
    in this dpt
  • Tsuga
    Tochigi · Japan
    0.0 km
    in this dpt

6 intersecting protected areas

  • Kitazawa

    IUCN IV

    Prefectural Wildlife Protection Area

  • Kanuma iwayama

    IUCN IV

    Prefectural Wildlife Protection Area

  • Mibu-ishibashi

    IUCN IV

    Prefectural Wildlife Protection Area

  • Moroyama

    IUCN IV

    Prefectural Wildlife Protection Area

  • Kamidono

    IUCN IV

    Prefectural Wildlife Protection Area

  • Gotenyama

    IUCN IV

    Prefectural Wildlife Protection Area

1 page = 1 named river (aggregation of 10 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

76 distinct species · 97 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 黒川 : 15 espèces reliées par 18 interactions GloBI sur 2 types (connectance 13.2%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
17
Interactions affichées
18
Connectance
0.132
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

445km

Max discharge

4,2m³/s

Max Strahler

3

Segments matched

10

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