Rivière· 33 segments

Wełna

Crosses 5 administrative regions : Gniezno, Oborniki, Poznań, Wągrowiec, Żnin

rivière

Total length

127km

Max discharge

104,5m³/s

Max Strahler

Segments matched

River geography5 admin regions · 0 communes

Parent watershed

hybas-2080356460822 km²

5 administrative regions crossed (GADM L2)

Oborniki
Wielkopolskie · Poland
52.6 km
in this dpt
Żnin
Kujawsko-Pomorskie · Poland
25.4 km
in this dpt
Wągrowiec
Wielkopolskie · Poland
24.9 km
in this dpt
Gniezno
Wielkopolskie · Poland
19.9 km
in this dpt
Poznań
Wielkopolskie · Poland
0.0 km
in this dpt

10 intersecting protected areas

Puszcza Notecka
IUCN Not Reported
Special Protection Area (Birds Directive)
Powidzko-Bieniszewski
IUCN Not Assigned
Protected Landscape Area
Dolina Wełny i Rynna Gołaniecko-Wągrowiecka
IUCN Not Assigned
Protected Landscape Area
Pojezierze Gnieźnieńskie
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Biedrusko
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Jezior Rogowskich
IUCN Not Assigned
Protected Landscape Area
Dolina Wełny
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Wełna
IUCN IV
Nature Reserve
Promenada
IUCN IV
Nature Reserve

1 more protected areassorted by area

Słonawy
IUCN IV
Nature Reserve

1 page = 1 named river (aggregation of 33 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

87 distinct species · 229 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 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 Wełna : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 75 interactions GloBI sur 6 types (connectance 9.6%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.096

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)