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dc.contributor.authorEl-Khaled, Yusuf C.
dc.contributor.authorNafeh, Rassil
dc.contributor.authorRoth, Florian
dc.contributor.authorRadecker, Nils
dc.contributor.authorKarcher, Denis B.
dc.contributor.authorJones, Burton
dc.contributor.authorVoolstra, Christian R.
dc.contributor.authorWild, Christian
dc.date.accessioned2021-06-09T06:50:20Z
dc.date.available2021-06-09T06:50:20Z
dc.date.issued2021-05-14
dc.identifier.citationEl-Khaled, Y. C., Nafeh, R., Roth, F., Rädecker, N., Karcher, D. B., Jones, B. H., … Wild, C. (2021). High plasticity of nitrogen fixation and denitrification of common coral reef substrates in response to nitrate availability. Marine Pollution Bulletin, 168, 112430. doi:10.1016/j.marpolbul.2021.112430
dc.identifier.issn0025-326X
dc.identifier.pmid34000709
dc.identifier.doi10.1016/j.marpolbul.2021.112430
dc.identifier.urihttp://hdl.handle.net/10754/669477
dc.description.abstractNitrogen cycling in coral reefs may be affected by nutrient availability, but knowledge about concentration-dependent thresholds that modulate dinitrogen fixation and denitrification is missing. We determined the effects of different nitrate concentrations (ambient, 1, 5, 10 μM nitrate addition) on both processes under two light scenarios (i.e., light and dark) using a combined acetylene assay for two common benthic reef substrates, i.e., turf algae and coral rubble. For both substrates, dinitrogen fixation rates peaked at 5 μM nitrate addition in light, whereas denitrification was highest at 10 μM nitrate addition in the dark. At 10 μm nitrate addition in the dark, a near-complete collapse of dinitrogen fixation concurrent with a 76-fold increase in denitrification observed for coral rubble, suggesting potential threshold responses linked to the nutritional state of the community. We conclude that dynamic nitrogen cycling activity may help stabilise nitrogen availability in microbial communities associated with coral reef substrates.
dc.description.sponsorshipThis work was supported by grant Wi 2677/9-1 from the German Research Foundation (DFG) to CW and by KAUST baseline funding to CRV and BHJ.
dc.description.sponsorshipWe are grateful to Najeh Kharbatia from CORE Labs of the King Abdullah University of Science and Technology (KAUST) for his technical support with the GC.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0025326X21004641
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Marine Pollution Bulletin. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Marine Pollution Bulletin, [168, , (2021-05-14)] DOI: 10.1016/j.marpolbul.2021.112430 . © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectCoral reefs
dc.subjectNutrient pollution
dc.subjectNutrient pollution
dc.subjectEutrophication
dc.subjectNitrogen cycling
dc.subjectTurf algae
dc.subjectCoral rubble
dc.titleHigh plasticity of nitrogen fixation and denitrification of common coral reef substrates in response to nitrate availability
dc.typeArticle
dc.contributor.departmentMarine Science Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.identifier.journalMarine Pollution Bulletin
dc.rights.embargodate2023-05-14
dc.eprint.versionPost-print
dc.contributor.institutionMarine Ecology Department, Faculty of Biology and Chemistry, University of Bremen, 28359 Bremen, Germany
dc.contributor.institutionBaltic Sea Centre, Stockholm University, 10691 Stockholm, Sweden
dc.contributor.institutionFaculty of Biological and Environmental Sciences, Tvärminne Zoological Station, University of Helsinki, 00014 Helsinki, Finland
dc.contributor.institutionDepartment of Biology, University of Konstanz, 78457 Konstanz, Germany
dc.contributor.institutionLaboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
dc.contributor.institutionAustralian National Centre for the Public Awareness of Science, Australian National University, ACT 2601 Canberra, Australia
dc.identifier.volume168
dc.identifier.pages112430
kaust.personRoth, Florian
kaust.personRadecker, Nils
kaust.personJones, Burton
kaust.personVoolstra, Christian R.
dc.identifier.eid2-s2.0-85105599912
kaust.acknowledged.supportUnitKAUST baseline funding


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