Statistic significance¹ (<i>P</i> values) of differences between prokaryotic communities of water samples of Arraial do Cabo region calculated based on partial sequences of 16S rRNA.

1P values of UniFrac P Test are calculated based on 1,000 permutations (pairwise differences). (<0.001) highly significant; (0.001–0.01) significant; (0.01–0.05) marginally significant; (0.05–0.1) suggestive; (>0.1) not significant. 2P values corrected for multiple comparisons using the Bonferroni correction. PO: region influenced by port activity and sewage disposal. RE: open ocean region. S: surface. F: bottom.