Lake and Turlough Habitats

Lake habitats comprise a range of specific protected waterbody types found in Ireland, including clear, mountain limestone and peatland lakes, all with unique assemblages of plants and wildlife adapted to different conditions. Turloughs are seasonal lakes, fed by groundwater in limestone areas and usually disappear in the summer.  Ireland holds the majority of the world’s turloughs. Lake and turlough habitats are important for ducks, divers, geese and swans, collectively known as waterbirds. They form an important wetland habitat stretching across Ireland that provides vital winter refuges for our internationally important populations of wintering waterbirds. In summer, they provide important breeding habitat for many resident species. The waterbirds will use the different water depths found in lakes and turloughs, and feed on plants and insects that make up healthy habitats and the grassy areas around them.

Areas of Opportunity for Restoration

Our analysis found that Counties Cavan, Monaghan and Leitrim had the most lakes in poor condition. Our prioritisation exercise identified some protected areas with restoration potential in those counties out to 2030, but there are other areas too in the southern part of Lough Corrib, on the western side of Lough Derg, in mid-Clare and around Lough Allua in west Cork. We identified 118 km2 of lake habitat area of opportunity in 17 Natura sites (55 km2 in 10 SACs and 63 km2 in 7 SPAs).

Map of Areas of Opportunity for restoration of Lake and Turlough habitats. Click on a square to see associated species and other information.

Restoration Measures

Key restoration measures for the lake-associated focal species include protecting and reinstating natural movement of water, improving water quality and maintaining a diverse mix of shallow water, open wet grassland and vegetated margins.

The restoration measures align closely with the conservation objectives for the focal breeding and wintering waterbird species by addressing the key ecological drivers that underpin habitat suitability, productivity and population stability. Measures to restore natural hydrological regimes and improve water quality will restore the water clarity, vegetation structure and invertebrate and fish prey bases that are essential for foraging waterbirds.