AUTHOR=Gómez-Consarnau Laura , Sañudo-Wilhelmy Sergio A. TITLE=Beyond the iron age: the ecological relevance of non-ferrous bioactive trace metals and organic growth factors in aquatic systems JOURNAL=Frontiers in Microbiology VOLUME=6 YEAR=2015 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2015.00218 DOI=10.3389/fmicb.2015.00218 ISSN=1664-302X