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Variations in the numerical (a and c) and relative (b and d) abundances of phytoplankton and their chytrid parasite (i.e., sporangia) communities. Samples were collected in triplicate (i.e., from three independent sampling operations for each sampling date) on two occasions during two different seasons in the eutrophic Lake Aydat and in the oligotrophic Lake Pavin. The variability between replicates was low, with a coefficient of variation that was always <10%.
