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Overview of the Antarctic continent showing ice-free regions sampled for bacterial diversity studies using (a) cultivation (84 studies, 156 samples) and (b) cultivation-independent (105 studies, 1961 samples) surveys. Ice-free areas are highlighted in brown. Sampling sites are shown in a color gradient from yellow to red with increasing number of sample locations. Map modified from map no. 13766 of the Australian Antarctic Data Centre (2010).
