HydroBASINS lev08 watershed · #8080212970
Bassin de Stewart River
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 1 administrative regions : Yukon
Sub-basin area
324,1km²
Upstream area
30 737,7km²
Discharge
268m³/s
Mean elev.
804m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Stewart River437 km²
- Bassin de Williamson Creek392 km²
1 intersecting protected areas
Big Island
IUCN IVHabitat Protection Area
7.64 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
795 distinct species · 13 188 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Stewart River : 29 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 90 interactions GloBI sur 6 types (connectance 10.0%, filtre Serrano α=0.2). 14 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°
-4,6°C
Annual rain
300mm
Moisture idx (CMI)
-0,46
Runoff
296mm/an
PET
553mm
AET
271mm
Mean slope
6,7°
Water table
126cm
Forest
80%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)