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dc.contributor.authorVoerman, Sofie E.
dc.contributor.authorMarsh, Beauregard C.
dc.contributor.authorBahia, Ricardo G.
dc.contributor.authorPereira-Filho, Guilherme H.
dc.contributor.authorBecker, Ana Clara F.
dc.contributor.authorAmado-Filho, Gilberto M.
dc.contributor.authorRuseckas, Arvydas
dc.contributor.authorTurnbull, Graham A.
dc.contributor.authorSamuel, Ifor D. W.
dc.contributor.authorBurdett, Heidi L.
dc.date.accessioned2023-10-04T12:30:09Z
dc.date.available2023-10-04T12:30:09Z
dc.date.issued2023-10-11
dc.identifier294202501
dc.identifier12459d8a-b06a-4721-8ea6-88ae449cf167
dc.identifier85173055252
dc.identifier.citationVoerman , S E , Marsh , B C , Bahia , R G , Pereira-Filho , G H , Becker , A C F , Amado-Filho , G M , Ruseckas , A , Turnbull , G A , Samuel , I D W & Burdett , H L 2023 , ' Dominance of photo over chromatic acclimation strategies by habitat-forming mesophotic red algae ' , Proceedings of the Royal Society B: Biological Sciences , vol. 290 , no. 2008 . https://doi.org/10.1098/rspb.2023.1329en
dc.identifier.issn0962-8452
dc.identifier.otherJisc: 1378618
dc.identifier.otherpublisher-id: rspb20231329
dc.identifier.otherORCID: /0000-0001-9114-3522/work/143917975
dc.identifier.urihttps://hdl.handle.net/10023/28496
dc.descriptionFunding was provided by a Leverhulme Trust Research Project grant no. (RPG-2018-113) to H.L.B., G.A.T. and I.D.W.S., an Engineering and Physical Sciences Research Council grant (EP/L017008/1) to G.A.T. and I.D.W.S., and a São Paulo Research Foundation (FAPESP) individual grant (#2016/14017-0) to G.H.P.-F.en
dc.description.abstractRed coralline algae are the deepest living macroalgae, capable of creating spatially complex reefs from the intertidal to 100+ m depth with global ecological and biogeochemical significance. How these algae maintain photosynthetic function under increasingly limiting light intensity and spectral availability is key to explaining their large depth distribution. Here, we investigated the photo- and chromatic acclimation and morphological change of free-living red coralline algae towards mesophotic depths in the Fernando do Noronha archipelago, Brazil. From 13 to 86 m depth, thalli tended to become smaller and less complex. We observed a dominance of the photo-acclimatory response, characterized by an increase in photosynthetic efficiency and a decrease in maximum electron transport rate. Chromatic acclimation was generally stable across the euphotic-mesophotic transition with no clear depth trend. Taxonomic comparisons suggest these photosynthetic strategies are conserved to at least the Order level. Light saturation necessitated the use of photoprotection to 65 m depth, while optimal light levels were met at 86 m. Changes to the light environment (e.g. reduced water clarity) due to human activities therefore places these mesophotic algae at risk of light limitation, necessitating the importance of maintaining good water quality for the conservation and protection of mesophotic habitats.
dc.format.extent779009
dc.language.isoeng
dc.relation.ispartofProceedings of the Royal Society B: Biological Sciencesen
dc.subjectPam fluorometryen
dc.subjectMesophotic reefen
dc.subjectMaerlen
dc.subjectPhotosynthesisen
dc.subjectRhodolithen
dc.subjectDASen
dc.titleDominance of photo over chromatic acclimation strategies by habitat-forming mesophotic red algaeen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorEPSRCen
dc.contributor.institutionUniversity of St Andrews. Organic Semiconductor Centreen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Energy Ethicsen
dc.contributor.institutionUniversity of St Andrews. Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doi10.1098/rspb.2023.1329
dc.description.statusPeer revieweden
dc.identifier.grantnumberRPG-2018-113en
dc.identifier.grantnumberep/l017008/1en


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