Ruisseau· 3 segments
Lettan
Crosses 1 administrative regions : Torsby
Total length
7km
Max discharge
1,7m³/s
Max Strahler
2
Segments matched
3
River geography1 admin regions · 0 communes
1 administrative regions crossed (GADM L2)
- TorsbyVärmland · Sweden8.0 kmin this dpt
2 intersecting protected areas
Klarälven, övre delen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Klarälven, övre delen
IUCN Not AssignedNatura 2000 SCI
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
49 distinct species · 123 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 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 Lettan : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 12 interactions GloBI sur 2 types (connectance 8.8%, filtre Serrano α=0.2). 1 bulle taxonomique (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
1,7m³/s
Max Strahler
2
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.