AUTHOR=Bathmann Ulrich , Schubert Hendrik , Andrén Elinor , Tuomi Laura , Radziejewska Teresa , Kulinski Karol , Chubarenko Irina TITLE=Editorial: Living Along Gradients: Past, Present, Future JOURNAL=Frontiers in Marine Science VOLUME=6 YEAR=2020 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2019.00801 DOI=10.3389/fmars.2019.00801 ISSN=2296-7745