Ontologia

HydroBASINS lev08 watershed · #2080379150

Bassin de Большой Иргиз

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 3 administrative regions : Krasnopartizanskiy rayon, Pugachev, Pugachevskiy rayon

3% lakePfafstetter: 28314037

Sub-basin area

714,8km²

Upstream area

18 368,3km²

Discharge

46,41m³/s

Mean elev.

56m

Administrative coverage

Hydrographic chain

3 dept-equivalent regions (GADM L2)

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

Species present

1 102 distinct species · 2 019 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

2 019 obs · 12 cellules
Obs. / cellule
≥ 1 637
190–1 636
45–189
26–44
< 26

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

Ecological tissue

Sample of 36 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 Большой Иргиз : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 61 interactions GloBI sur 6 types (connectance 9.7%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
61
Connectance
0.097
Patrimoniales
1
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°

5,5°C

Annual rain

443mm

Moisture idx (CMI)

-0,44

Runoff

84mm/an

PET

791mm

AET

380mm

Mean slope

0,6°

Water table

144cm

Forest

3%

Crops

68%

Urban

2%

Protected

0%

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