Bacterial distribution of the most abundant groups within the predominant classes of the Proteobacterial phylum.

<p>The <i>Alpha</i>- (A), <i>Gamma</i>- (B) and <i>Betaproteobacteria</i> (C) were consistently present in high abundances in all of the samples. A further evaluation within these classes showed differences in the profiles and abundance of the bacterial groups in seawater and on the kelp surface. X-axis sample designation is the same as <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0067480#pone-0067480-g001" target="_blank">Figure 1</a>.