Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification

Abstract Rhodolith beds built by free-living coralline algae are important ecosystems for marine biodiversity and carbonate production. Yet, our mechanistic understanding regarding rhodolith physiology and its drivers is still limited. Using three rhodolith species with different branching morpholog...

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Autores principales:	Nadine Schubert, Laurie C. Hofmann, Antonella C. Almeida Saá, Anderson Camargo Moreira, Rafael Güntzel Arenhart, Celso Peres Fernandes, Dirk de Beer, Paulo A. Horta, João Silva
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/925775c6347d4346a546823ab5286c2b
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spelling	oai:doaj.org-article:925775c6347d4346a546823ab5286c2b2021-12-02T14:49:24ZCalcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification10.1038/s41598-021-90632-62045-2322https://doaj.org/article/925775c6347d4346a546823ab5286c2b2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90632-6https://doaj.org/toc/2045-2322Abstract Rhodolith beds built by free-living coralline algae are important ecosystems for marine biodiversity and carbonate production. Yet, our mechanistic understanding regarding rhodolith physiology and its drivers is still limited. Using three rhodolith species with different branching morphologies, we investigated the role of morphology in species’ physiology and the implications for their susceptibility to ocean acidification (OA). For this, we determined the effects of thallus topography on diffusive boundary layer (DBL) thickness, the associated microscale oxygen and pH dynamics and their relationship with species’ metabolic and light and dark calcification rates, as well as species’ responses to short-term OA exposure. Our results show that rhodolith branching creates low-flow microenvironments that exhibit increasing DBL thickness with increasing branch length. This, together with species’ metabolic rates, determined the light-dependent pH dynamics at the algal surface, which in turn dictated species’ calcification rates. While these differences did not translate in species-specific responses to short-term OA exposure, the differences in the magnitude of diurnal pH fluctuations (~ 0.1–1.2 pH units) between species suggest potential differences in phenotypic plasticity to OA that may result in different susceptibilities to long-term OA exposure, supporting the general view that species’ ecomechanical characteristics must be considered for predicting OA responses.Nadine SchubertLaurie C. HofmannAntonella C. Almeida SaáAnderson Camargo MoreiraRafael Güntzel ArenhartCelso Peres FernandesDirk de BeerPaulo A. HortaJoão SilvaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nadine Schubert Laurie C. Hofmann Antonella C. Almeida Saá Anderson Camargo Moreira Rafael Güntzel Arenhart Celso Peres Fernandes Dirk de Beer Paulo A. Horta João Silva Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
description	Abstract Rhodolith beds built by free-living coralline algae are important ecosystems for marine biodiversity and carbonate production. Yet, our mechanistic understanding regarding rhodolith physiology and its drivers is still limited. Using three rhodolith species with different branching morphologies, we investigated the role of morphology in species’ physiology and the implications for their susceptibility to ocean acidification (OA). For this, we determined the effects of thallus topography on diffusive boundary layer (DBL) thickness, the associated microscale oxygen and pH dynamics and their relationship with species’ metabolic and light and dark calcification rates, as well as species’ responses to short-term OA exposure. Our results show that rhodolith branching creates low-flow microenvironments that exhibit increasing DBL thickness with increasing branch length. This, together with species’ metabolic rates, determined the light-dependent pH dynamics at the algal surface, which in turn dictated species’ calcification rates. While these differences did not translate in species-specific responses to short-term OA exposure, the differences in the magnitude of diurnal pH fluctuations (~ 0.1–1.2 pH units) between species suggest potential differences in phenotypic plasticity to OA that may result in different susceptibilities to long-term OA exposure, supporting the general view that species’ ecomechanical characteristics must be considered for predicting OA responses.
format	article
author	Nadine Schubert Laurie C. Hofmann Antonella C. Almeida Saá Anderson Camargo Moreira Rafael Güntzel Arenhart Celso Peres Fernandes Dirk de Beer Paulo A. Horta João Silva
author_facet	Nadine Schubert Laurie C. Hofmann Antonella C. Almeida Saá Anderson Camargo Moreira Rafael Güntzel Arenhart Celso Peres Fernandes Dirk de Beer Paulo A. Horta João Silva
author_sort	Nadine Schubert
title	Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
title_short	Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
title_full	Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
title_fullStr	Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
title_full_unstemmed	Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification
title_sort	calcification in free-living coralline algae is strongly influenced by morphology: implications for susceptibility to ocean acidification
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/925775c6347d4346a546823ab5286c2b
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Calcification in free-living coralline algae is strongly influenced by morphology: Implications for susceptibility to ocean acidification

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