Correction to: The ISME Journal advance online publication 20 February 2015; doi:10.1038/ismej.2015.21

After the publication of this paper, an error was noticed in the sentences ‘Phylogenetic analysis using the 16S–23S rRNA internal transcribed spacer region revealed that the AMZ-associated Prochlorococcus assemblages are mainly composed of two novel LL ecotypes (termed LL-V and LL-VI), which correspond to basal groups linking Prochlorococcus with marine Synechococcus (Lavin et al., 2010), the other dominant marine picocyanobacteria. However, no genomic or picocyanobacterium information exists for these AMZ lineages’. ‘Picocyanobacteria’ should be ‘picocyanobacterium’ and in the next sentence, picocyanobacterium should be ‘physiological’.

The publishers would like to apologise for any inconvenience caused by this error. These changes have now been implemented in the paper.