Diel population and functional synchrony of microbial communities on coral reefs

Linda Wegley Kelly (), Craig E. Nelson, Andreas F. Haas, Douglas S. Naliboff, Sandi Calhoun, Craig A. Carlson, Robert A. Edwards, Michael D. Fox, Mark Hatay, Maggie D. Johnson, Emily L. A. Kelly, Yan Wei Lim, Saichetana Macherla, Zachary A. Quinlan, Genivaldo Gueiros Z. Silva, Mark J. A. Vermeij, Brian Zgliczynski, Stuart A. Sandin, Jennifer E. Smith and Forest Rohwer
Additional contact information
Linda Wegley Kelly: San Diego State University
Craig E. Nelson: University of Hawaiʻi at Mānoa
Andreas F. Haas: NIOZ Royal Netherlands Institute for Sea Research and Utrecht University
Douglas S. Naliboff: San Diego State University
Sandi Calhoun: San Diego State University
Craig A. Carlson: University of California
Robert A. Edwards: San Diego State University
Michael D. Fox: University of California
Mark Hatay: San Diego State University
Maggie D. Johnson: University of California
Emily L. A. Kelly: University of California
Yan Wei Lim: San Diego State University
Saichetana Macherla: San Diego State University
Zachary A. Quinlan: University of Hawaiʻi at Mānoa
Genivaldo Gueiros Z. Silva: San Diego State University
Mark J. A. Vermeij: Caribbean Marine Biological Institute (CARMABI)
Brian Zgliczynski: University of California
Stuart A. Sandin: University of California
Jennifer E. Smith: University of California
Forest Rohwer: San Diego State University

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract On coral reefs, microorganisms are essential for recycling nutrients to primary producers through the remineralization of benthic-derived organic matter. Diel investigations of reef processes are required to holistically understand the functional roles of microbial players in these ecosystems. Here we report a metagenomic analysis characterizing microbial communities in the water column overlying 16 remote forereef sites over a diel cycle. Our results show that microbial community composition is more dissimilar between day and night samples collected from the same site than between day or night samples collected across geographically distant reefs. Diel community differentiation is largely driven by the flux of Psychrobacter sp., which is two-orders of magnitude more abundant during the day. Nighttime communities are enriched with species of Roseobacter, Halomonas, and Alteromonas encoding a greater variety of pathways for carbohydrate catabolism, further illustrating temporal patterns of energetic provisioning between different marine microbes. Dynamic diel fluctuations of microbial populations could also support the efficient trophic transfer of energy posited in coral reef food webs.

Date: 2019
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DOI: 10.1038/s41467-019-09419-z

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