Rivière· 2 segments
Rolfstaån
Crosses 1 administrative regions : Hudiksvall
Total length
7km
Max discharge
17,1m³/s
Max Strahler
4
Segments matched
2
River geography1 admin regions · 0 communes
1 administrative regions crossed (GADM L2)
- HudiksvallGävleborg · Sweden11.7 kmin this dpt
8 intersecting protected areas
Storberget
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
2001175 Storberget
IUCN Not AssignedNature Reserve
Storberget
IUCN Not AssignedNatura 2000 SCI
2064663 Vallåsen
IUCN IaNature Reserve
SK 221-1998
IUCN IaHabitat Protection Area
SK 169-2008
IUCN IaHabitat Protection Area
SK 314-2002
IUCN IaHabitat Protection Area
SK 312-2018
IUCN IaHabitat Protection Area
1 page = 1 named river (aggregation of 2 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
421 distinct species · 1 431 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 46 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 Rolfstaån : 38 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 5 types (connectance 7.4%, 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
7km
Max discharge
17,1m³/s
Max Strahler
4
Segments matched
2
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.