Correction to: The ISME Journal (2010) 4, 621–632; doi:10.1038/ismej.2009.148; published online 28 January 2010

Since the publication of this paper, the authors have noticed an error in Figure 4. The correct figure is shown below.

Figure 4
figure 1

Expression profiles for genes involved in DNA replication and cell division (a), and for sigma factor genes (b, c).

The authors would like to apologize for any inconvenience this may have caused.