Heatmap displaying the 51 most abundant OTUs after resampling.

<p>Taxonomic affiliation of two classification databases is shown after identification number: rdp/FW. <i>A</i> and <i>F</i> indicate attached and free-living communities, respectively, and dxx indicates day of sampling. Letters in brackets indicate the phytoplankton species in which that OTU was within the most abundant: a, <i>Aulacoseira granulata</i> (18 OTUs); c, <i>Cylindrospermopsis raciborskii</i> (20 OTUS)<i>;</i> m, <i>Microcystis aeruginosa</i> (20 OTUs). All these OTUs, except #616, were present in triplicates in at least one treatment of the phytoplankton species where they occurred.