Ontologia

Rivière· 3 segments

碓氷川

Crosses 3 administrative regions : Annaka, Takasaki, Tomioka

rivière

Total length

40km

Max discharge

4,5m³/s

Max Strahler

4

Segments matched

3

River geography3 admin regions · 0 communes

Parent watershed

hybas-40805737501784 km²

3 administrative regions crossed (GADM L2)

  • Annaka
    Gunma · Japan
    21.3 km
    in this dpt
  • Takasaki
    Gunma · Japan
    2.8 km
    in this dpt
  • Tomioka
    Gunma · Japan
    0.0 km
    in this dpt

7 intersecting protected areas

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

Species present

297 distinct species · 411 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 37 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 碓氷川 : 30 espèces reliées par 47 interactions GloBI sur 4 types (connectance 7.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
47
Connectance
0.071
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

40km

Max discharge

4,5m³/s

Max Strahler

4

Segments matched

3

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