Ontologia

HydroBASINS lev08 watershed · #2080269260

Bassin de Цна

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 6 administrative regions : Bologovskiy rayon, Firovskiy rayon, Kuvshinovskiy rayon, Ostashkovskiy rayon, Selizharovskiy rayon +1

22% lakePfafstetter: 24329090

Sub-basin area

2 175,7km²

Upstream area

2 175,7km²

Discharge

17,27m³/s

Mean elev.

231m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Мста1071 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

6 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

423 distinct species · 710 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

710 obs · 41 cellules
Obs. / cellule
≥ 69
47–68
23–46
12–22
< 12

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

Ecological tissue

Sample of 38 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 Цна : 32 espèces reliées par 68 interactions GloBI sur 6 types (connectance 9.7%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
68
Connectance
0.097
Patrimoniales
0
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°

3,5°C

Annual rain

650mm

Moisture idx (CMI)

0,05

Runoff

250mm/an

PET

618mm

AET

478mm

Mean slope

1,2°

Water table

85cm

Forest

89%

Crops

5%

Urban

0%

Protected

13%

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