Influence of coral and algal exudates on microbially mediated reef metabolism

PeerJ
Andreas HaasJennifer E Smith

Abstract

Benthic primary producers in tropical reef ecosystems can alter biogeochemical cycling and microbial processes in the surrounding seawater. In order to quantify these influences, we measured rates of photosynthesis, respiration, and dissolved organic carbon (DOC) exudate release by the dominant benthic primary producers (calcifying and non-calcifying macroalgae, turf-algae and corals) on reefs of Mo'orea French Polynesia. Subsequently, we examined planktonic and benthic microbial community response to these dissolved exudates by measuring bacterial growth rates and oxygen and DOC fluxes in dark and daylight incubation experiments. All benthic primary producers exuded significant quantities of DOC (roughly 10% of their daily fixed carbon) into the surrounding water over a diurnal cycle. The microbial community responses were dependent upon the source of the exudates and whether the inoculum of microbes included planktonic or planktonic plus benthic communities. The planktonic and benthic microbial communities in the unamended control treatments exhibited opposing influences on DO concentration where respiration dominated in treatments comprised solely of plankton and autotrophy dominated in treatments with benthic plus plankon m...Continue Reading

References

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Citations

Jun 12, 2014·PeerJ·Maggie Dorothy JohnsonJennifer E Smith
Mar 31, 2015·Environmental Microbiology·Cynthia B SilveiraFabiano L Thompson
Mar 29, 2016·PeerJ·Francoise Cavada-BlancoCarolina Bastidas
Jul 22, 2014·Environmental Microbiology·Bart LievensHans Jacquemyn
Oct 9, 2014·Frontiers in Microbiology·Jérôme P PayetRebecca L Vega Thurber
Aug 31, 2016·Nature Microbiology·Andreas HaasForest Rohwer
Aug 3, 2016·Annual Review of Microbiology·David G BourneNicole S Webster
Jan 17, 2017·Nature Reviews. Microbiology·Rebecca Vega ThurberAdrienne M S Correa
Sep 13, 2017·The ISME Journal·Anny CárdenasChristian R Voolstra
Mar 5, 2020·PloS One·Matthew EdwardsSadie Small
Oct 8, 2019·FEMS Microbiology Ecology·Fan ZhangRussell T Hill
Apr 13, 2020·Journal of Phycology·Guillermo Diaz-Pulido, Cristina Barrón
May 10, 2017·FEMS Microbiology Reviews·Cynthia B SilveiraFabiano L Thompson
Dec 4, 2019·ELife·Cynthia B SilveiraForest Rohwer
Mar 26, 2020·IScience·Inka Vanwonterghem, Nicole S Webster

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