Rivière· 34 segments

Osa

Crosses 8 administrative regions : Biłgoraj, Brodnica, Grudziądz, Grudziądz (City), Iława +3

rivière

Total length

138km

Max discharge

10,8m³/s

Max Strahler

Segments matched

River geography8 admin regions · 0 communes

Parent watershed

hybas-20803385801626 km²

8 administrative regions crossed (GADM L2)

Grudziądz
Kujawsko-Pomorskie · Poland
40.0 km
in this dpt
Iława
Warmińsko-Mazurskie · Poland
39.2 km
in this dpt
Nowe Miasto
Warmińsko-Mazurskie · Poland
31.2 km
in this dpt
Brodnica
Kujawsko-Pomorskie · Poland
8.4 km
in this dpt
Stalowa Wola
Podkarpackie · Poland
5.6 km
in this dpt
Biłgoraj
Lubelskie · Poland
5.6 km
in this dpt
Tarnobrzeg
Podkarpackie · Poland
4.1 km
in this dpt
Grudziądz (City)
Kujawsko-Pomorskie · Poland
2.6 km
in this dpt

20 intersecting protected areas

Puszcza Sandomierska
IUCN Not Reported
Special Protection Area (Birds Directive)
Puszcza Solska
IUCN Not Reported
Special Protection Area (Birds Directive)
Park Krajobrazowy Pojezierza Iławskiego
IUCN V
Landscape Park
Lasy Iławskie
IUCN Not Reported
Special Protection Area (Birds Directive)
Ostoja Iławska
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Brodnicki Park Krajobrazowy
IUCN V
Landscape Park
Doliny Osy i Gardęgi
IUCN Not Assigned
Protected Landscape Area
Strefy Krawędziowej Doliny Wisły
IUCN Not Assigned
Protected Landscape Area
Enklawy Puszczy Sandomierskiej
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)

11 more protected areassorted by area

Skarliński
IUCN Not Assigned
Protected Landscape Area
Góry Łosiowe
IUCN Not Assigned
Landscape Park
Dolina Osy
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Jeziora Goryńskiego
IUCN Not Assigned
Protected Landscape Area
Dolina Kakaju
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Jezioro Karaś
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Karas Lake Nature Reserve
IUCN Ib
Wetland of International Importance (Ramsar Site)
Jezioro Karaś
IUCN IV
Nature Reserve
Dolina Osy
IUCN IV
Nature Reserve
Aleje Pojezierza Iławskiego
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Rogóźno Zamek
IUCN IV
Nature Reserve

1 page = 1 named river (aggregation of 34 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

287 distinct species · 1 959 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 22 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 Osa : 10 espèces reliées par 68 interactions GloBI sur 5 types (connectance 26.9%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.269

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)