Ruisseau· 2 segments
L'Oudar
Crosses 3 administrative regions : Ain, Genève, Nyon
Total length
12km
Max discharge
0,8m³/s
Max Strahler
1
Segments matched
2
River geography3 admin regions · 8 communes
3 administrative regions crossed (GADM L2)
- AinAuvergne-Rhône-Alpes · France10.3 kmin this dpt
- GenèveGenève · Switzerland0.5 kmin this dpt
- NyonVaud · Switzerland0.0 kmin this dpt
8 communes (L5)For countries with L5
8 intersecting protected areas
Haut-Jura
IUCN VRegional Nature Park
Crêts du haut-Jura
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Crêts du Haut-Jura
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Haute Chaîne Du Jura
IUCN IVNational Nature Reserve
Bois de Porte, Les Dailles
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance
Combes Chappuis
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance
Pré-Béroux
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance
Combes Chapuis
IUCN Not AssignedForest Reserves
1 page = 1 named river (aggregation of 2 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
3 803 distinct species · 59 936 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 45 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 L'Oudar : 31 espèces reliées par 139 interactions GloBI sur 6 types (connectance 13.4%, filtre Serrano α=0.2). 15 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
12km
Max discharge
0,8m³/s
Max Strahler
1
Segments matched
2
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.