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Acidification increases abundances of Vibrionales and Planctomycetia associated to a seaweed-grazer system: potential consequences for disease and prey digestion efficiency

2018-03Journal article Open access
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dc.contributor.authorAires, Tânia
dc.contributor.authorSerebryakova, Alexandra
dc.contributor.authorViard, Frederique
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorEngelen, Aschwin H.
dc.date.accessioned2018-12-07T14:53:36Z
dc.date.available2018-12-07T14:53:36Z
dc.date.issued2018-03
dc.description.abstractOcean acidification significantly affects marine organisms in several ways, with complex interactions. Seaweeds might benefit from rising CO2 through increased photosynthesis and carbon acquisition, with subsequent higher growth rates. However, changes in seaweed chemistry due to increased CO2 may change the nutritional quality of tissue for grazers. In addition, organisms live in close association with a diverse microbiota, which can also be influenced by environmental changes, with feedback effects. As gut microbiomes are often linked to diet, changes in seaweed characteristics and associated microbiome can affect the gut microbiome of the grazer, with possible fitness consequences. In this study, we experimentally investigated the effects of acidification on the microbiome of the invasive brown seaweed Sargassum muticum and a native isopod consumer Synisoma nadejda. Both were exposed to ambient CO2 conditions (380 ppm, pH 8.16) and an acidification treatment (1,000 ppm, pH 7.86) for three weeks. Microbiome diversity and composition were determined using high-throughput sequencing of the variable regions V5-7 of 16S rRNA. We anticipated that as a result of acidification, the seaweed-associated bacterial community would change, leading to further changes in the gut microbiome of grazers. However, no significant effects of elevated CO2 on the overall bacterial community structure and composition were revealed in the seaweed. In contrast, significant changes were observed in the bacterial community of the grazer gut. Although the bacterial community of S. muticum as whole did not change, Oceanospirillales and Vibrionales (mainly Pseudoalteromonas) significantly increased their abundance in acidified conditions. The former, which uses organic matter compounds as its main source, may have opportunistically taken advantage of the possible increase of the C/N ratio in the seaweed under acidified conditions. Pseudoalteromonas, commonly associated to diseased seaweeds, suggesting that acidification may facilitate opportunistic/pathogenic bacteria. In the gut of S. nadejda, the bacterial genus Planctomycetia increased abundance under elevated CO2. This shift might be associated to changes in food (S. muticum) quality under acidification. Planctomycetia are slow-acting decomposers of algal polymers that could be providing the isopod with an elevated algal digestion and availability of inorganic compounds to compensate the shifted C/N ratio under acidification in their food. In conclusion, our results indicate that even after only three weeks of acidified conditions, bacterial communities associated to ungrazed seaweed and to an isopod grazer show specific, differential shifts in associated bacterial community. These have potential consequences for seaweed health (as shown in corals) and isopod food digestion. The observed changes in the gut microbiome of the grazer seem to reflect changes in the seaweed chemistry rather than its microbial composition.
dc.description.sponsorshipErasmus Mundus Doctoral Programme MARES on Marine Ecosystem Health Conservation [MARES_13_08]; FCT (Foundation for Science and Technology, Portugal) [SFRH/BPD/63703/2009, SFRH/BPD/107878/2015, SFRH/BPD/116774/2016]; EU SEAS-ERA project INVASIVES [SEAS-ERA/0001/2012]; [CCMAR/Multi/04326/2013]
dc.description.sponsorshipMARES_13_08
dc.identifier.doi10.7717/peerj.4377
dc.identifier.issn2167-8359
dc.identifier.urihttp://hdl.handle.net/10400.1/11597
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPeerj Inc
dc.relationDEMOGRAPHIC ASSESSMENT OF CONTEMPORARY BIOME DEGRADATION: PROVIDING MANAGEMENT AND RESTORATION TOOLS FOR CORAL, KELP AND SEAGRASS COMMUNITIES
dc.relationMarine macrophytes holobionts: Acclimation and adaptation mechanisms across oceans in a global change scenario
dc.relationInvasive seaweeds in rising temperatures: impacts and the role of acclimation and adaptation
dc.relationCentre of Marine Sciences
dc.subjectEpiphytic Bacterial Community
dc.subjectIn-Situ Hybridization
dc.subjectGreat-Barrier-Reef
dc.subjectOcean Acidification
dc.subjectPhylogenetic Analysis
dc.subjectMicrobial Community
dc.subjectGut Microbiota
dc.subjectMetagenomic Analysis
dc.subjectLaminaria-Japonica
dc.subjectBalanus-Amphitrite
dc.titleAcidification increases abundances of Vibrionales and Planctomycetia associated to a seaweed-grazer system: potential consequences for disease and prey digestion efficiency
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDEMOGRAPHIC ASSESSMENT OF CONTEMPORARY BIOME DEGRADATION: PROVIDING MANAGEMENT AND RESTORATION TOOLS FOR CORAL, KELP AND SEAGRASS COMMUNITIES
oaire.awardTitleMarine macrophytes holobionts: Acclimation and adaptation mechanisms across oceans in a global change scenario
oaire.awardTitleInvasive seaweeds in rising temperatures: impacts and the role of acclimation and adaptation
oaire.awardTitleCentre of Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F63703%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBPD%2F107878%2F2015/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBPD%2F116774%2F2016/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/SEAS-ERA%2F0001%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04326%2F2013/PT
oaire.citation.startPageUNSP e4377
oaire.citation.titlePeerj
oaire.citation.volume6
oaire.fundingStreamOE
oaire.fundingStreamOE
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameAires
person.familyNameSerrao
person.familyNameEngelen
person.givenNameTania
person.givenNameEster A.
person.givenNameAschwin
person.identifier282868
person.identifierC-6686-2012
person.identifier.ciencia-id4318-9E2C-32B9
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.ciencia-id911A-9A0C-744D
person.identifier.orcid0000-0002-1964-6819
person.identifier.orcid0000-0003-1316-658X
person.identifier.orcid0000-0002-9579-9606
person.identifier.ridM-8306-2013
person.identifier.ridM-3432-2013
person.identifier.scopus-author-id7004093604
person.identifier.scopus-author-id6701622770
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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