Cell wall organic matrix composition and biomineralization across reef-building coralline algae under global change

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dc.contributor.authorBergstrom, E.
dc.contributor.authorLahnstein, J.
dc.contributor.authorCollins, H.
dc.contributor.authorPage, T.M.
dc.contributor.authorBulone, V.
dc.contributor.authorDiaz-Pulido, G.
dc.date.issued2023
dc.descriptionFirst published: 27 October 2022
dc.description.abstractCrustose coralline algae (CCA) are one of the most important benthic substrate consolidators on coral reefs through their ability to deposit calcium carbonate on an organic matrix in their cell walls. Discrete polysaccharides have been recognized for their role in biomineralization, yet little is known about the carbohydrate composition of organic matrices across CCA taxa and whether they have the capacity to modulate their organic matrix constituents amidst environmental change, particularly the threats of ocean acidification (OA) and warming. We simulated elevated pCO₂ and temperature (IPCC RCP 8.5) and subjected four mid-shelf Great Barrier Reef species of CCA to two months of experimentation. To assess the variability in surficial monosaccharide composition and biomineralization across species and treatments, we determined the monosaccharide composition of the polysaccharides present in the cell walls of surficial algal tissue and quantified calcification. Our results revealed dissimilarity among species' monosaccharide constituents, which suggests that organic matrices are composed of different polysaccharides across CCA taxa. We also found that species differentially modulate composition in response to ocean acidification and warming. Our findings suggest that both variability in composition and ability to modulate monosaccharide abundance may play a crucial role in surficial biomineralization dynamics under the stress of OA and global warming.
dc.description.statementofresponsibilityEllie Bergstrom, Jelle Lahnstein, Helen Collins, Tessa M. Page, Vincent Bulone, and Guillermo Diaz-Pulido
dc.identifier.citationJournal of Phycology, 2023; 59(1):111-125
dc.identifier.doi10.1111/jpy.13290
dc.identifier.issn0022-3646
dc.identifier.issn1529-8817
dc.identifier.orcidLahnstein, J. [0000-0002-4202-1403]
dc.identifier.orcidCollins, H. [0000-0003-3885-7707]
dc.identifier.orcidBulone, V. [0000-0002-9742-4701] [0000-0003-2809-4160]
dc.identifier.urihttps://hdl.handle.net/2440/137138
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160103071
dc.rights© 2022 The Authors. Journal of Phycology published by Wiley Periodicals LLC on behalf of Phycological Society of America. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.source.urihttps://doi.org/10.1111/jpy.13290
dc.subjectbiomineralization
dc.subjectcalcification
dc.subjectcoral reefs
dc.subjectcrustose coralline algae
dc.subjectglobal warming
dc.subjectmonosaccharides
dc.subjectocean acidification
dc.subjectorganic matrix
dc.titleCell wall organic matrix composition and biomineralization across reef-building coralline algae under global change
dc.typeJournal article
pubs.publication-statusPublished

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