HydroBASINS lev08 watershed · #2080029890
Bassin de Siikajoki
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 : Northern Ostrobothnia
Sub-basin area
294,8km²
Upstream area
4 060km²
Discharge
34,64m³/s
Mean elev.
41m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Luohuanjoki306 km²
- Bassin de Kärsämänjoki262 km²
1 dept-equivalent regions (GADM L2)
- 296.7 km²100.0% of basin
8 intersecting protected areas
Revonneva-Ruonneva
IUCN Not ReportedSpecial Protection Area (Birds Directive)
20.15 km² overlap
Revonneva-Ruonneva
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
20.15 km² overlap
Metsälain erityisen tärkeät elinympäristöt Pohjois-Pohjanmaa
IUCN Not AssignedForest habitats of special importance according to the Forest Act (OECM)
0.18 km² overlap
Private Nature Reserve
0.18 km² overlap
Huhtaneva-Lumineva
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.10 km² overlap
Metsätalouden ympäristötukikohteet Pohjois-Pohjanmaa
IUCN Not AssignedForestry environmental aid contracts (OECM)
0.04 km² overlap
Private Nature Reserve
0.02 km² overlap
Private Nature Reserve
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 519 distinct species · 21 592 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Siikajoki : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 66 interactions GloBI sur 4 types (connectance 18.8%, filtre Serrano α=0.2). 11 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°
2,1°C
Annual rain
484mm
Moisture idx (CMI)
-0,01
Runoff
248mm/an
PET
491mm
AET
366mm
Mean slope
2,3°
Water table
69cm
Forest
71%
Crops
4%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)