HydroBASINS lev08 watershed · #2080330220
Bassin de Seira
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 across 3 countries : Hrodna, Lazdijų, Sejny
Sub-basin area
866,3km²
Upstream area
866,5km²
Discharge
5,35m³/s
Mean elev.
132m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 786.6 km²90.4% of basin
- 78.8 km²9.1% of basin
- 4.6 km²0.5% of basin
30 intersecting protected areas
State Park
122.93 km² overlap
Pojezierze Sejneńskie
IUCN Not AssignedProtected Landscape Area
57.93 km² overlap
Veisiejų regioninis parkas
IUCN Not ReportedSite of Community Importance (Habitats Directive)
28.01 km² overlap
Pojezierze Sejneńskie
IUCN Not ReportedSite of Community Importance (Habitats Directive)
24.02 km² overlap
Metelių regioninis parkas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.89 km² overlap
State Park
8.89 km² overlap
Petroškų miškas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
7.39 km² overlap
Sopotskinskiy
IUCN IVNature Sanctuary or Partial Reserve
7.23 km² overlap
Pertako miškas
IUCN Not ReportedSpecial Protection Area (Birds Directive)
6.11 km² overlap
21 more protected areassorted by overlap area
Biosphere polygon
6.11 km² overlap
Pertako apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
4.20 km² overlap
Puszcza Augustowska
IUCN Not ReportedSpecial Protection Area (Birds Directive)
3.43 km² overlap
Nature Reserve
2.54 km² overlap
Ostoja Augustowska
IUCN Not ReportedSite of Community Importance (Habitats Directive)
2.09 km² overlap
Snaigyno ežeras
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.06 km² overlap
Kauknorio apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
1.74 km² overlap
Liubelio miškas
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.46 km² overlap
Vilko ežeras ir jo apyežeris
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1.20 km² overlap
Vilko botaninis draustinis
IUCN IVNature Reserve
1.20 km² overlap
Niedaus ir Veisiejų ežerai
IUCN Not ReportedSpecial Protection Area (Birds Directive)
1.19 km² overlap
Nature Reserve
1.19 km² overlap
Baltosios Ančios apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.89 km² overlap
Ilgininkų miško dalis
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.86 km² overlap
Kučiuliškės-Drapalių apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.77 km² overlap
Nature Reserve
0.77 km² overlap
Ilgio ežeras (I)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.66 km² overlap
Stankūnų kaimo apylinkės
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.64 km² overlap
Bestraigiškių kaimo apylinkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.62 km² overlap
Dainaviškių pelkės
IUCN Not ReportedSite of Community Importance (Habitats Directive)
0.57 km² overlap
Liūnelio ežeras ir jo apyežerės
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.46 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 658 distinct species · 13 023 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Seira : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 63 interactions GloBI sur 3 types (connectance 13.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
6,4°C
Annual rain
595mm
Moisture idx (CMI)
-0,14
Runoff
194mm/an
PET
693mm
AET
500mm
Mean slope
1,3°
Water table
94cm
Forest
46%
Crops
33%
Urban
0%
Protected
24%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)