Freshwater protists do not go with the flow: population structure in Gonyostomum semen independent of connectivity among lakes Ingrid Sassenhagen,1* Josefin Sefbom,2 Torbjörn Säll,3 Anna Godhe2 and Karin Rengefors1 1Aquatic Ecology, Lund University, Sölvegatan 37, 22362 Lund, Sweden.