Planktonic events may cause polymictic-dimictic regime shifts in temperate lakes Terrassenhaus BerlĂ­n - Brandlhuber + Emde Muck Petzet Architekten Burlon Fig. 1. Location of the study site showing (a) Germany with the state... Villa Kellermann in Potsdam at Heiligen See | Berlin Fig. 2 Biological and geochemical processes at coastal peatland sites...