Ruisseau· 3 segments

L'Hermance

Crosses 3 administrative regions : Genève, Haute-Savoie, Nyon

ruisseau

Total length

14km

Max discharge

0,9m³/s

Max Strahler

Segments matched

River geography3 admin regions · 5 communes

Parent watershed

hybas-20805259201005 km²

3 administrative regions crossed (GADM L2)

Haute-Savoie
Auvergne-Rhône-Alpes · France
8.2 km
in this dpt
Genève
Genève · Switzerland
2.6 km
in this dpt
Nyon
Vaud · Switzerland
0.1 km
in this dpt

5 communes (L5)For countries with L5

Veigy-Foncenex5.93 km
Chens-sur-Léman2.04 km
Lac Léman0.20 km
Machilly0.00 km
Loisin0.00 km

9 intersecting protected areas

Rives du Lac Léman
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
Lac Léman
IUCN Not Reported
Special Protection Area (Birds Directive)
Lac Léman
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Rive gauche du Petit-Lac (GE)
IUCN IV
Federal Inventory of Reserves for Waterbirds and Migratory Birds of International and National Imp.
Marais de Chilly et de Marival
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Vallon de l'Hermance
IUCN Not Assigned
Forest Reserves
La fabrique
IUCN IV
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)
Roselières Du Lac Léman
IUCN IV
Biotope Protection Order
Bois Rosset
IUCN Not Assigned
Forest Reserves

1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

3 846 distinct species · 62 929 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de L'Hermance : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 117 interactions GloBI sur 6 types (connectance 15.0%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

117

Connectance

0.150

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)