Ruisseau· 4 segments
Le Yar
Crosses 2 administrative regions : Côtes-d'Armor, Finistère
Total length
22km
Max discharge
1,4m³/s
Max Strahler
2
Segments matched
4
River geography2 admin regions · 8 communes
2 administrative regions crossed (GADM L2)
- Côtes-d'ArmorBretagne · France16.7 kmin this dpt
- FinistèreBretagne · France0.9 kmin this dpt
8 communes (L5)For countries with L5
- Plufur5.33 km
- Plounérin4.40 km
- Plestin-les-Grèves4.20 km
- Tréduder1.43 km
- Trémel1.39 km
- Guerlesquin0.89 km
- Saint-Michel-en-Grève0.00 km
- Plouégat-Moysan0.00 km
3 intersecting protected areas
Armorique
IUCN VRegional Nature Park
Regional Nature Reserve
Etang du Moulin Neuf
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
724 distinct species · 17 229 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 Le Yar : 20 espèces reliées par 38 interactions GloBI sur 4 types (connectance 13.8%, filtre Serrano α=0.2). 4 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
22km
Max discharge
1,4m³/s
Max Strahler
2
Segments matched
4
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.