<p>Stations are numbered according to a previous study [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0195587#pone.0195587.ref034" target="_blank">34</a>]. Bacterial abundance and chl <i>a</i> concentrations are depth-integrated throughout the sea ice column, and presented in either single or duplicated cores.</p