| Summary: | The icefree regions of the Antarctic continent (Antarctic oases [1]), have attracted the special atten tion of researchers from the very first studies, as regions more likely to harbor life. A prominent feature of their landscape is the presence of numerous differ ent lakes. One such Lake is Lake Radok, located in the Amery Oasis (a socalled “mountain ” oasis [2]) in East Antarctica. Antarctic lakes are unique ecosystems which are characterized by lowtemperature and, mainly, olig otrophic conditions supporting rather simple trun cated food webs [3]. Studying the biodiversity and community structure of such lakes affords a great opportunity to understand the mechanisms of adapta tion and evolution of microorganisms, as well as in the
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