Correction to: The ISME Journal (2010) 6, 777–783; doi:10.1038/ismej.2010.2

Since the publication of this paper, the authors have noticed an omission in the acknowledgements section. The missing text is as follows.

LIF, SM and AC were funded by SEP-CONACyT (Mexico), projects no. 56045 (LIF) and 2004-C01-46475-Q (SM, AC), respectively. LIF was funded by PAPIIT, project no. IN225709-3.

The authors would like to apologize for this error.