Erratum to: Polar Biol DOI 10.1007/s00300-013-1314-8

We would like to make the following corrections to the original article. Firstly, in Materials and Methods, 3rd paragraph, 220 fg C m−3 should read 220 fg C μm−3, and secondly, in Acknowledgements, the correct project numbers are Grant No. PP13020 and Grant No. PE11050.