High plasticity of nitrogen fixation and denitrification of common coral reef substrates in response to nitrate availability

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dc.contributor.author El-Khaled, Yusuf C.
dc.contributor.author Nafeh, Rassil
dc.contributor.author Roth, Florian
dc.contributor.author Rädecker, Nils
dc.contributor.author Karcher, Denis B.
dc.contributor.author Jones, Burton H.
dc.contributor.author Voolstra, Christian R.
dc.contributor.author Wild, Christian
dc.date.accessioned 2021-07-20T11:41:01Z
dc.date.available 2021-07-20T11:41:01Z
dc.date.issued 2021-07
dc.identifier.citation El-Khaled , Y C , Nafeh , R , Roth , F , Rädecker , N , Karcher , D B , Jones , B H , Voolstra , C R & Wild , C 2021 , ' High plasticity of nitrogen fixation and denitrification of common coral reef substrates in response to nitrate availability ' , Marine Pollution Bulletin , vol. 168 , 112430 . https://doi.org/10.1016/j.marpolbul.2021.112430
dc.identifier.other PURE: 166764710
dc.identifier.other PURE UUID: dd247068-90e7-4fe6-8ba0-a34bf00ba257
dc.identifier.other WOS: 000661849500007
dc.identifier.other ORCID: /0000-0003-4004-5863/work/97268575
dc.identifier.uri http://hdl.handle.net/10138/332496
dc.description.abstract Nitrogen cycling in coral reefs may be affected by nutrient availability, but knowledge about concentrationdependent thresholds that modulate dinitrogen fixation and denitrification is missing. We determined the effects of different nitrate concentrations (ambient, 1, 5, 10 mu M 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 mu M nitrate addition in light, whereas denitrification was highest at 10 mu M nitrate addition in the dark. At 10 mu m 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. en
dc.format.extent 8
dc.language.iso eng
dc.relation.ispartof Marine Pollution Bulletin
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Coral reefs
dc.subject Nutrient pollution
dc.subject Eutrophication
dc.subject Nitrogen cycling
dc.subject Turf algae
dc.subject Coral rubble
dc.subject DINITROGEN FIXATION
dc.subject OXIDE REDUCTION
dc.subject PHASE-SHIFTS
dc.subject N-2 FIXATION
dc.subject ACETYLENE INHIBITION
dc.subject NUTRIENT ENRICHMENT
dc.subject PRIMARY PRODUCERS
dc.subject MICROBIAL MATS
dc.subject RED-SEA
dc.subject CYANOBACTERIA
dc.subject 1172 Environmental sciences
dc.title High plasticity of nitrogen fixation and denitrification of common coral reef substrates in response to nitrate availability en
dc.type Article
dc.contributor.organization Tvärminne Zoological Station
dc.contributor.organization Biological stations
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.marpolbul.2021.112430
dc.relation.issn 0025-326X
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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