Rivière· 21 segments
Marsån
Crosses 1 administrative regions : Vilhelmina
Total length
35km
Max discharge
9,3m³/s
Max Strahler
4
Segments matched
21
River geography1 admin regions · 0 communes
1 administrative regions crossed (GADM L2)
- VilhelminaVästerbotten · Sweden75.7 kmin this dpt
30 intersecting protected areas
2001846 Marsfjället
IUCN IbNature Reserve
Marsfjället
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Marsfjället
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Marsfjället
IUCN IbNatura 2000 SCI
Marsfjället
IUCN IbNatura 2000 SPA
2001857 Njakafjäll
IUCN IbNature Reserve
Njakafjäll
IUCN IbNatura 2000 SCI
Njakafjäll
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2057322 Vännåt
IUCN IaNature Reserve
21 more protected areassorted by area
1073664956
IUCN Not ApplicableVoluntary set-aside areas
1073664958
IUCN Not ApplicableVoluntary set-aside areas
1073664789
IUCN Not ApplicableVoluntary set-aside areas
1073664782
IUCN Not ApplicableVoluntary set-aside areas
1073664783
IUCN Not ApplicableVoluntary set-aside areas
1073664720
IUCN Not ApplicableVoluntary set-aside areas
1073664767
IUCN Not ApplicableVoluntary set-aside areas
1073664781
IUCN Not ApplicableVoluntary set-aside areas
1073664791
IUCN Not ApplicableVoluntary set-aside areas
1073664796
IUCN Not ApplicableVoluntary set-aside areas
1073664957
IUCN Not ApplicableVoluntary set-aside areas
1073664710
IUCN Not ApplicableVoluntary set-aside areas
1073664766
IUCN Not ApplicableVoluntary set-aside areas
1073664704
IUCN Not ApplicableVoluntary set-aside areas
1073664716
IUCN Not ApplicableVoluntary set-aside areas
1073664937
IUCN Not ApplicableVoluntary set-aside areas
1073664712
IUCN Not ApplicableVoluntary set-aside areas
1073664976
IUCN Not ApplicableVoluntary set-aside areas
1073664892
IUCN Not ApplicableVoluntary set-aside areas
1073664972
IUCN Not ApplicableVoluntary set-aside areas
1073664947
IUCN Not ApplicableVoluntary set-aside areas
1 page = 1 named river (aggregation of 21 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
276 distinct species · 1 382 observations
Source: GBIF Occurrence snapshot 2026-05-01.
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).
Indicateurs du tissu écologique
Tissu écologique de Marsån : 29 espèces reliées par 45 interactions GloBI sur 4 types (connectance 6.8%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
35km
Max discharge
9,3m³/s
Max Strahler
4
Segments matched
21
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.