The impact of catchment conifer plantation forestry on the hydrochemistry of peatland lakes

► We investigated the impact of conifer plantation forestry on lake water chemistry. ► Elevated concentrations of P, N, Al and Fe and reduced dissolved oxygen in afforested lakes. ► We also investigated the stream run-off chemistry from a recently clearfelled site. ► Similar results recorded from the streams at the clearfell site - Glennamong. ► Clearfell has the greatest impact on the water quality of receiving surface waters.