AUTHOR=Müller-Navarra Dörthe C. , Ruess Liliane TITLE=Editorial: Essential Biomolecules Caught in the Food Web? JOURNAL=Frontiers in Ecology and Evolution VOLUME=7 YEAR=2019 URL=https://www.frontiersin.org/journals/ecology-and-evolution/articles/10.3389/fevo.2019.00471 DOI=10.3389/fevo.2019.00471 ISSN=2296-701X