Ruisseau· 15 segments
Sajna
Crosses 3 administrative regions : Bartoszyce, Kętrzyn, Olsztyn
Total length
50km
Max discharge
4,6m³/s
Max Strahler
3
Segments matched
15
River geography3 admin regions · 0 communes
3 administrative regions crossed (GADM L2)
- KętrzynWarmińsko-Mazurskie · Poland35.3 kmin this dpt
- BartoszyceWarmińsko-Mazurskie · Poland24.7 kmin this dpt
- OlsztynWarmińsko-Mazurskie · Poland0.2 kmin this dpt
4 intersecting protected areas
Ostoja Warmińska
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Jezior Legińsko-Mrągowskich
IUCN Not AssignedProtected Landscape Area
Doliny Rzeki Guber
IUCN Not AssignedProtected Landscape Area
Polder Sątopy-Samulewo
IUCN IVNature Reserve
1 page = 1 named river (aggregation of 15 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
133 distinct species · 379 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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).
Indicateurs du tissu écologique
Tissu écologique de Sajna : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 60 interactions GloBI sur 3 types (connectance 13.8%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
50km
Max discharge
4,6m³/s
Max Strahler
3
Segments matched
15
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.