Ontologia

HydroBASINS lev08 watershed · #2080357890

Bassin de Mała Wełna

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

15% lakePfafstetter: 24227044

Sub-basin area

683,1km²

Upstream area

683,1km²

Discharge

2,3m³/s

Mean elev.

103m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Wełna122 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

5 dept-equivalent regions (GADM L2)

5 intersecting protected areas

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

Species present

1 414 distinct species · 47 373 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

47 373 obs · 21 cellules
Obs. / cellule
≥ 12 994
8 121–12 993
1 469–8 120
494–1 468
< 494

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 37 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de Mała Wełna : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 93 interactions GloBI sur 5 types (connectance 12.6%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
93
Connectance
0.126
Patrimoniales
2
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°

7,9°C

Annual rain

540mm

Moisture idx (CMI)

-0,26

Runoff

107mm/an

PET

731mm

AET

459mm

Mean slope

0,8°

Water table

95cm

Forest

16%

Crops

63%

Urban

0%

Protected

8%

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