HydroBASINS lev08 watershed · #2080031440
Bassin de Trödjeån
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 : Gävle
Sub-basin area
229km²
Upstream area
229km²
Discharge
2,35m³/s
Mean elev.
22m
Administrative coverage
30 intersecting protected areas
2031029 Testeboskogen
IUCN VNature Reserve
2.80 km² overlap
2042627 Harkskärsfjärden
IUCN IaNature Reserve
2.61 km² overlap
Harkskärsfjärden
IUCN Not ReportedSpecial Protection Area (Birds Directive)
2.37 km² overlap
Harkskärsfjärden
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2.37 km² overlap
Harkskärsfjärden
IUCN IaNatura 2000 SPA
2.37 km² overlap
Harkskärsfjärden
IUCN IaNatura 2000 SCI
2.37 km² overlap
2052281 Marsjön-Bondsundet
IUCN IaNature Reserve
2.17 km² overlap
2004512 Sjugarna
IUCN IaNature Reserve
1.24 km² overlap
Sörsundet
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.87 km² overlap
21 more protected areassorted by overlap area
Sörsundet
IUCN Not AssignedNatura 2000 SCI
0.87 km² overlap
Ormön
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.67 km² overlap
2000319 Ormön
IUCN IaNature Reserve
0.67 km² overlap
Ormön
IUCN IaNatura 2000 SCI
0.67 km² overlap
2040330 Tångberget
IUCN IaNature Reserve
0.53 km² overlap
2013961 Trödjemurarna
IUCN IaNature Reserve
0.48 km² overlap
2046813 Gråberget
IUCN IaNature Reserve
0.47 km² overlap
SK 512-2002
IUCN IVNature conservation agreement, Swedish Forest Agency
0.29 km² overlap
SK 518-2014
IUCN IaHabitat Protection Area
0.21 km² overlap
SK 474-2005
IUCN IaHabitat Protection Area
0.17 km² overlap
Håmansmaren
IUCN IaNatura 2000 SCI
0.17 km² overlap
Håmansmaren
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
0.17 km² overlap
2046108 Håmansmaren
IUCN IaNature Reserve
0.17 km² overlap
SK 903-2002
IUCN IaHabitat Protection Area
0.13 km² overlap
SK 301-2010
IUCN IaHabitat Protection Area
0.10 km² overlap
SK 140-1999
IUCN IaHabitat Protection Area
0.08 km² overlap
SK 771-2002
IUCN IaHabitat Protection Area
0.07 km² overlap
SK 913-2002
IUCN IaHabitat Protection Area
0.06 km² overlap
SK 125-2001
IUCN IaHabitat Protection Area
0.06 km² overlap
SK 316-2013
IUCN IaHabitat Protection Area
0.05 km² overlap
SK 99-2002
IUCN IaHabitat Protection Area
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 188 distinct species · 82 624 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Trödjeån : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 88 interactions GloBI sur 4 types (connectance 14.8%, 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°
4,9°C
Annual rain
617mm
Moisture idx (CMI)
0,08
Runoff
330mm/an
PET
567mm
AET
425mm
Mean slope
1,8°
Water table
89cm
Forest
97%
Crops
0%
Urban
2%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)