Graham Eaton / Split level shot of Llyn Idwal and Cwm Idwal, showing freshwater habitat with Green lacustrine algae (Chlorophyceae sp.), Snowdonia NP, Gwynedd, Wales, UK, August

Graham Eaton / Split level image of Cwm Idwal and Llyn Idwal showing lake and mountain habitat and lacustrine algae, Snowdonia NP, North Wales, UK, January 2010. Winner of the Living Landscape: Connectivity categor...

Graham Eaton / Underwater landscape in Llyn Dinas, a mountain lake, surface covered in ice, and green lacustrine algae growing on the bottom, Snowdonia NP, Gwynedd, Wales, UK, December

Graham Eaton / Split level shot of Llyn Idwal and Cwm Idwal, showing freshwater habitat with Green lacustrine algae (Chlorophyceae sp.), Snowdonia NP, Gwynedd, Wales, UK, August

Graham Eaton / A split level image of Cwm Idwal and Llyn Idwal, a glacial tarn, showing freshwater habitat with Juncus grass and lacustrine algae, Snowdonia NP, Gwynedd, Wales, UK, December