Ontologia

HydroBASINS lev08 watershed · #2080332220

Bassin de Janka

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 2 administrative regions : Starogard, Tczew

Pfafstetter: 24241022

Sub-basin area

158,1km²

Upstream area

158,1km²

Discharge

0,99m³/s

Mean elev.

72m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Wierzyca65 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

3 intersecting protected areas

  • Bory Tucholskie

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    31.42 km² overlap

  • Borów Tucholskich

    IUCN Not Assigned

    Protected Landscape Area

    13.44 km² overlap

  • Gniewski

    IUCN Not Assigned

    Protected Landscape Area

    2.30 km² overlap

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

Species present

213 distinct species · 381 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

381 obs · 4 cellules
Obs. / cellule
≥ 120
120–119
93–119
93–92
< 93

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

Ecological tissue

Sample of 46 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 Janka : 34 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 112 interactions GloBI sur 6 types (connectance 10.4%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
47
Interactions affichées
112
Connectance
0.104
Patrimoniales
3
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°

7,0°C

Annual rain

556mm

Moisture idx (CMI)

-0,15

Runoff

199mm/an

PET

654mm

AET

468mm

Mean slope

1,1°

Water table

108cm

Forest

9%

Crops

69%

Urban

0%

Protected

0%

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