Ruisseau· 4 segments

逆川

Crosses 3 administrative regions : Nikkō, Tsukuba, Utsunomiya

ruisseau

Total length

192km

Max discharge

0,6m³/s

Max Strahler

Segments matched

River geography3 admin regions · 0 communes

Parent watershed

hybas-4080574080285 km²

3 administrative regions crossed (GADM L2)

Nikkō
Tochigi · Japan
5.2 km
in this dpt
Tsukuba
Ibaraki · Japan
3.6 km
in this dpt
Utsunomiya
Tochigi · Japan
2.8 km
in this dpt

12 intersecting protected areas

Nikko
IUCN V
National Park
Suigo-Tsukuba
IUCN V
Quasi National Park
Nikko
IUCN IV
Prefectural Wildlife Protection Area
Nikko Line
IUCN V
Green Corridor
Tsukubasan
IUCN IV
Prefectural Wildlife Protection Area
Oku-Nikko-shitsugen
IUCN II
Wetland of International Importance (Ramsar Site)
Senjogahara Shitsugen
IUCN IV
Rare Population Protected Forest
Odashiro Shitsugen
IUCN IV
Rare Population Protected Forest
Kotoku Mizunara
IUCN IV
Rare Population Protected Forest

3 more protected areassorted by area

Heisei kodomo no mori
IUCN IV
Prefectural Wildlife Protection Area
Kotoku Harunire
IUCN IV
Rare Population Protected Forest
Yutaki Mizunara Idenshigen
IUCN IV
Rare Population Protected Forest

1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

222 distinct species · 814 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 36 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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de 逆川 : 32 espèces reliées par 45 interactions GloBI sur 4 types (connectance 6.8%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.068

Patrimoniales

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)