Ruisseau· 4 segments

北沢

Crosses 4 administrative regions : Chino, Ina, Kamiina, Shiojiri

ruisseau

Total length

129km

Max discharge

0,7m³/s

Max Strahler

Segments matched

River geography4 admin regions · 0 communes

Parent watershed

hybas-40805888501010 km²

4 administrative regions crossed (GADM L2)

Chino
Nagano · Japan
10.7 km
in this dpt
Ina
Nagano · Japan
4.4 km
in this dpt
Kamiina
Nagano · Japan
3.3 km
in this dpt
Shiojiri
Nagano · Japan
0.0 km
in this dpt

10 intersecting protected areas

Minami alps
IUCN Not Applicable
UNESCO-MAB Biosphere Reserve
Yatsugatake-Chushinkogen
IUCN V
Quasi National Park
Minami alps
IUCN II
National Park
Mt. Yatsugatake
IUCN V
Green Corridor
Minamiarupusu（Shiomito）
IUCN IV
Biocenosis Protected Forest
Mitsuminegawa joryu
IUCN IV
Prefectural Wildlife Protection Area
Minamitateshina
IUCN IV
Prefectural Wildlife Protection Area
Yatsugatake
IUCN IV
Biocenosis Protected Forest
Gombee touge
IUCN V
Local Environment Conservation Area(Nagano)

1 more protected areassorted by area

Maruyamadani
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

539 distinct species · 1 083 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 23 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 北沢 : 18 espèces reliées par 27 interactions GloBI sur 6 types (connectance 10.7%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.107

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)