Journal Cover & Description
Cover image

Cover photograph: In a microbial community, maintaining a favorable proton concentration is key. While protons may move from one member of the community to the other like a stack of poker chips, a well-balanced distribution will keep the game running, as a stable pH can maintain community growth for extended periods. (See related article at e01450–18.) (Copyright © 2018 American Society for Microbiology. All Rights Reserved.)