Rivière· 44 segments

那賀川

Crosses 5 administrative regions : Anan, Katsuura, Komatsushima, Miyoshi, Naka

rivière

Total length

134km

Max discharge

51,1m³/s

Max Strahler

Segments matched

River geography5 admin regions · 0 communes

Parent watershed

hybas-4080041070882 km²

5 administrative regions crossed (GADM L2)

Naka
Tokushima · Japan
71.9 km
in this dpt
Anan
Tokushima · Japan
21.5 km
in this dpt
Katsuura
Tokushima · Japan
0.0 km
in this dpt
Komatsushima
Tokushima · Japan
0.0 km
in this dpt
Miyoshi
Tokushima · Japan
0.0 km
in this dpt

9 intersecting protected areas

Tsurugisan
IUCN V
Quasi National Park
Tsurugisansankei
IUCN IV
National Wildlife Protection Area
Chubusankei
IUCN V
Prefectural Natural Park
Higashisankei
IUCN V
Prefectural Natural Park
Harumori
IUCN IV
Prefectural Wildlife Protection Area
Aiai land
IUCN IV
Prefectural Wildlife Protection Area
HASHIMOTO FAMILY FOREST
IUCN Not Applicable
OECM
Kakurinji
IUCN IV
Prefectural Wildlife Protection Area
Minamigawa
IUCN IV
Prefectural Wildlife Protection Area

1 page = 1 named river (aggregation of 44 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

144 distinct species · 270 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 10 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 那賀川 : 8 espèces reliées par 9 interactions GloBI sur 2 types (connectance 20.0%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.200

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)