AUTHOR=Kleppel Gary S. , Provenza Fred D. , Villalba Juan J. TITLE=Editorial: Livestock Production and the Functioning of Agricultural Ecosystems JOURNAL=Frontiers in Sustainable Food Systems VOLUME=5 YEAR=2021 URL=https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2021.690016 DOI=10.3389/fsufs.2021.690016 ISSN=2571-581X