Relative abundance of nitrogen cycling microbes in coral holobionts reflects environmental nitrate availability

Show simple item record Tilstra, Arjen Roth, Florian El-Khaled, Yusuf C. Pogoreutz, Claudia Raedecker, Nils Voolstra, Christian R. Wild, Christian 2021-06-18T10:10:01Z 2021-06-18T10:10:01Z 2021-06-02
dc.identifier.citation Tilstra , A , Roth , F , El-Khaled , Y C , Pogoreutz , C , Raedecker , N , Voolstra , C R & Wild , C 2021 , ' Relative abundance of nitrogen cycling microbes in coral holobionts reflects environmental nitrate availability ' , Royal Society Open Science , vol. 8 , 201835 .
dc.identifier.other PURE: 165275508
dc.identifier.other PURE UUID: 537827d6-7e32-47f2-9935-64623fbb0ad9
dc.identifier.other WOS: 000659157200001
dc.identifier.other ORCID: /0000-0003-4004-5863/work/95728628
dc.description.abstract Recent research suggests that nitrogen (N) cycling microbes are important for coral holobiont functioning. In particular, coral holobionts may acquire bioavailable N via prokaryotic dinitrogen (N-2) fixation or remove excess N via denitrification activity. However, our understanding of environmental drivers on these processes in hospite remains limited. Employing the strong seasonality of the central Red Sea, this study assessed the effects of environmental parameters on the proportional abundances of N cycling microbes associated with the hard corals Acropora hemprichii and Stylophora pistillata. Specifically, we quantified changes in the relative ratio between nirS and nifH gene copy numbers, as a proxy for seasonal shifts in denitrification and N-2 fixation potential in corals, respectively. In addition, we assessed coral tissue-associated Symbiodiniaceae cell densities and monitored environmental parameters to provide a holobiont and environmental context, respectively. While ratios of nirS to nifH gene copy numbers varied between seasons, they revealed similar seasonal patterns in both coral species, with ratios closely following patterns in environmental nitrate availability. Symbiodiniaceae cell densities aligned with environmental nitrate availability, suggesting that the seasonal shifts in nirS to nifH gene abundance ratios were probably driven by nitrate availability in the coral holobiont. Thereby, our results suggest that N cycling in coral holobionts probably adjusts to environmental conditions by increasing and/or decreasing denitrification and N-2 fixation potential according to environmental nitrate availability. Microbial N cycling may, thus, extenuate the effects of changes in environmental nitrate availability on coral holobionts to support the maintenance of the coral-Symbiodiniaceae symbiosis. en
dc.format.extent 10
dc.language.iso eng
dc.relation.ispartof Royal Society Open Science
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject coral reefs
dc.subject Scleractinia
dc.subject seasonality
dc.subject denitrification
dc.subject dinitrogen fixation
dc.subject diazotrophy
dc.subject N-2 FIXATION
dc.subject REEFS
dc.subject DIVERSITY
dc.subject ALIGNS
dc.subject LIGHT
dc.subject KEY
dc.subject 1181 Ecology, evolutionary biology
dc.title Relative abundance of nitrogen cycling microbes in coral holobionts reflects environmental nitrate availability en
dc.type Article
dc.contributor.organization Tvärminne Zoological Station
dc.contributor.organization Biological stations
dc.description.reviewstatus Peer reviewed
dc.relation.issn 2054-5703
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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