PCA and biplot analysis of molecular parameters and taxonomic units.

<p>The ~90° angle between the red and green arrows represent the general trend of the column loadings (red diamonds, green circles, brown square and purple triangle). Specifically, the relationships between the column loadings is represented by the angle between them centered at 0,0 and extending to the position of the data point in the cartesian plot. Abbreviations: sequence coverage (Cov), median virtig length (N50), unclassified dsDNA viruses (U), paired-end reads (PE), <i>Caudovirales</i> (Ca), BLAST identified virtigs (ID), maximum virtig length (MAX), <i>Mimiviridae</i> (M), number of virtigs (#Vir), log10 DNA concentration used for MDA ([DNA]), <i>Microviridae</i> (Mi), <i>Inoviridae</i> (In), the percent of the sequence containing G and C nucleotides (GC%), and d0 to d5 (dilutions). Colored symbols: PE reads sequenced, PE reads assembled, maximum virtig length, BLAST identified virtigs, <i>Caudovirales</i>, unclassified ds DNA phages, <i>Phycodnaviridae</i>, <i>Iridoviridae</i>, and unclassified dsDNA viruses (red diamond); DNA concentration for MDA, number of virtigs, GC%, <i>Inoviridae</i>, <i>Microviridae</i>, <i>Circoviridae</i>, unclassified ssDNA viruses, <i>Geminiviridae</i>, <i>Mimiviridae</i>, <i>Nanoviridae</i> (green circle); sequence coverage (purple triangle); N50 (brown box); and dilutions (blue circle).