News
Invasive water lily threatens Lough Leane
Environmental group Lochanna Beo has raised concerns over large carpets of the invasive Fringed Water Lily proliferating along the shoreline of Ross Bay and Bog Island on Lough Leane.
The plant, known scientifically as Nymphoides peltata, is an invasive aquatic species listed under European Communities regulations.
It thrives in nutrient-rich, eutrophic waters caused by high levels of nitrogen and phosphorus from fertilizers and wastewater discharge.
Identified by its five vibrant yellow fringed petals, the perennial plant roots at the lake bed with long stems reaching the surface.
Late in the season, seeds form floating chains that spread across the water, while boat traffic can also unintentionally disperse seeds to new areas.
The dense mats are currently impacting local boatmen by entangling engine propellers.
The National Parks and Wildlife Service (NPWS) has urged watercraft operators to avoid driving through the weed mats and reminds lake users to follow the "Check, Clean, Dry" protocol for all vessels.
Lochanna Beo spokesperson Valerie Harrington warned that the plant threatens to disrupt the lake's ecosystem and food web, pointing to wider water quality issues.
The Environmental Protection Agency (EPA) has highlighted that Lough Leane is failing to meet Water Framework Directive targets, citing excess nutrients from the Killarney wastewater treatment plant as a key factor. Despite the facility being placed on the EPA Priority Areas List, recent parliamentary responses indicate no upgrade work is scheduled before 2030.
