HydroBASINS lev08 watershed · #2080361010

Bassin de Warta

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 8 administrative regions : Gniezno, Oborniki, Poznań, Poznań (City), Września +3

11% lakePfafstetter: 24227050

Sub-basin area

1 412,3km²

Upstream area

25 032,7km²

Discharge

94,83m³/s

Mean elev.

89m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Samica Kierska628 km²

▲ Receives from 2 basins

Bassin de Warta595 km²
Bassin de Samica416 km²

8 dept-equivalent regions (GADM L2)

Poznań
Wielkopolskie · Poland
1014.9 km²
71.6% of basin
Poznań (City)
Wielkopolskie · Poland
238.6 km²
16.8% of basin
Gniezno
Wielkopolskie · Poland
61.9 km²
4.4% of basin
Środa Wielkopolska
Wielkopolskie · Poland
53.1 km²
3.7% of basin
Oborniki
Wielkopolskie · Poland
35.0 km²
2.5% of basin
Września
Wielkopolskie · Poland
7.7 km²
0.5% of basin
Wągrowiec
Wielkopolskie · Poland
6.7 km²
0.5% of basin
Śrem
Wielkopolskie · Poland
0.0 km²
0.0% of basin

30 intersecting protected areas

Park Krajobrazowy Puszcza Zielonka
IUCN V
Landscape Park
96.19 km² overlap
Biedrusko
IUCN Not Reported
Site of Community Importance (Habitats Directive)
89.34 km² overlap
Obszar Chronionego Krajobrazu w gminie Kórnik
IUCN Not Assigned
Protected Landscape Area
70.95 km² overlap
Biedrusko
IUCN Not Assigned
Protected Landscape Area
63.41 km² overlap
Lednicki Park Krajobrazowy
IUCN V
Landscape Park
48.47 km² overlap
Park Krajobrazowy Promno
IUCN V
Landscape Park
27.15 km² overlap
Dolina Cybiny
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
24.27 km² overlap
Ostoja Wielkopolska
IUCN Not Reported
Site of Community Importance (Habitats Directive)
23.55 km² overlap
Wielkopolski Park Narodowy
IUCN II
National Park
22.61 km² overlap

21 more protected areassorted by overlap area

Ostoja Rogalińska
IUCN Not Reported
Special Protection Area (Birds Directive)
22.31 km² overlap
Uroczyska Puszczy Zielonki
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
14.98 km² overlap
Ostoja koło Promna
IUCN Not Reported
Site of Community Importance (Habitats Directive)
14.01 km² overlap
Rogaliński Park Krajobrazowy
IUCN V
Landscape Park
13.49 km² overlap
Rogalińska Dolina Warty
IUCN Not Reported
Site of Community Importance (Habitats Directive)
7.27 km² overlap
Dolina rzeki Wirynki
IUCN Not Assigned
Protected Landscape Area
2.20 km² overlap
Dolina Cybiny w Poznaniu
IUCN Not Assigned
Protected Landscape Area
1.83 km² overlap
Fortyfikacje w Poznaniu
IUCN Not Reported
Site of Community Importance (Habitats Directive)
1.49 km² overlap
Buczyna w Długiej Goślinie
IUCN Not Reported
Site of Community Importance (Habitats Directive)
1.34 km² overlap
Meteoryt Morasko
IUCN IV
Nature Reserve
0.55 km² overlap
Dolina Cybiny w Nekielce
IUCN Not Assigned
Protected Landscape Area
0.42 km² overlap
Jezioro Dębiniec
IUCN IV
Nature Reserve
0.37 km² overlap
Jezioro Pławno
IUCN IV
Nature Reserve
0.17 km² overlap
Jezioro Czarne
IUCN IV
Nature Reserve
0.17 km² overlap
Las Mieszany w Nadleśnictwie Łopuchówko
IUCN IV
Nature Reserve
0.11 km² overlap
Żywiec Dziewięciolistny
IUCN Not Assigned
Nature Reserve
0.10 km² overlap
Śnieżycowy Jar
IUCN IV
Nature Reserve
0.10 km² overlap
Okrąglak
IUCN IV
Nature Reserve
0.08 km² overlap
Jezioro Drążynek
IUCN IV
Nature Reserve
0.06 km² overlap
Klasztorne Modrzewie koło Dąbrówki Kościelnej
IUCN IV
Nature Reserve
0.06 km² overlap
Las Liściasty w Promnie
IUCN IV
Nature Reserve
0.06 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

6 919 distinct species · 284 093 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 34 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 Bassin de Warta : 24 espèces reliées par 88 interactions GloBI sur 2 types (connectance 14.8%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.148

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

8,2°C

Annual rain

529mm

Moisture idx (CMI)

-0,29

Runoff

106mm/an

PET

741mm

AET

452mm

Mean slope

0,9°

Water table

120cm

Forest

18%

Crops

47%

Urban

25%

Protected

17%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)