Calcifying Response and Recovery Potential of the Brown Alga Padina pavonica under Ocean Acidification

David Iluz; Simona Fermani; Michal Ramot; Michela Reggi; Erik Caroselli; Fiorella Prada; Zvy Dubinsky; Stefano Goffredo; Giuseppe Falini

doi:10.1021/acsearthspacechem.7b00051

Calcifying Response and Recovery Potential of the Brown Alga Padina pavonica under Ocean Acidification

David Iluz, Simona Fermani, Michal Ramot, Michela Reggi, Erik Caroselli, Fiorella Prada, Zvy Dubinsky, Stefano Goffredo, Giuseppe Falini^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Anthropogenic carbon dioxide (CO₂) emissions are causing ocean acidification (OA), which affects calcifying organisms. Recent studies have shown that Padina pavonica investigated along a natural pCO₂ gradient seems to acclimate to OA by reducing calcified structures and changing mineralogy from aragonite to calcium sulfate salts. The aim of the present study was to study the potential for acclimation of P. pavonica to OA along the same gradient and in aquaria under controlled conditions. P. pavonica was cross-transplanted for 1 week from a normal pH site (mean values of pH_TS 8.1 and pCO₂ = 391 μatm) to a low pH site (mean values of pH_TS 7.4 and pCO₂ = 1044 μatm) and vice versa. Results showed that this calcifying alga did survive under acute environmental pH_TS changes but its calcification was significantly reduced. P. pavonica decalcified and changed mineralogy at pH_TS 7.4, but once brought back at pH_TS 8.1, it partially recovered the aragonite loss while preserving the calcium sulfate phases that formed under low pH_TS. These results suggest that P. pavonica could be used as a bioindicator for monitoring OA as well as localized anthropogenic acidity fluctuations.

Original language	English
Pages (from-to)	316-323
Number of pages	8
Journal	ACS Earth and Space Chemistry
Volume	1
Issue number	6
DOIs	https://doi.org/10.1021/acsearthspacechem.7b00051
State	Published - 17 Aug 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

Keywords

Padina pavonica
algae
calcium carbonate
calcium sulfate phases
ocean acidification
transplanted

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10.1021/acsearthspacechem.7b00051

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title = "Calcifying Response and Recovery Potential of the Brown Alga Padina pavonica under Ocean Acidification",

abstract = "Anthropogenic carbon dioxide (CO2) emissions are causing ocean acidification (OA), which affects calcifying organisms. Recent studies have shown that Padina pavonica investigated along a natural pCO2 gradient seems to acclimate to OA by reducing calcified structures and changing mineralogy from aragonite to calcium sulfate salts. The aim of the present study was to study the potential for acclimation of P. pavonica to OA along the same gradient and in aquaria under controlled conditions. P. pavonica was cross-transplanted for 1 week from a normal pH site (mean values of pHTS 8.1 and pCO2 = 391 μatm) to a low pH site (mean values of pHTS 7.4 and pCO2 = 1044 μatm) and vice versa. Results showed that this calcifying alga did survive under acute environmental pHTS changes but its calcification was significantly reduced. P. pavonica decalcified and changed mineralogy at pHTS 7.4, but once brought back at pHTS 8.1, it partially recovered the aragonite loss while preserving the calcium sulfate phases that formed under low pHTS. These results suggest that P. pavonica could be used as a bioindicator for monitoring OA as well as localized anthropogenic acidity fluctuations.",

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author = "David Iluz and Simona Fermani and Michal Ramot and Michela Reggi and Erik Caroselli and Fiorella Prada and Zvy Dubinsky and Stefano Goffredo and Giuseppe Falini",

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AU - Iluz, David

AU - Fermani, Simona

AU - Ramot, Michal

AU - Reggi, Michela

AU - Caroselli, Erik

AU - Prada, Fiorella

AU - Dubinsky, Zvy

AU - Goffredo, Stefano

AU - Falini, Giuseppe

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AB - Anthropogenic carbon dioxide (CO2) emissions are causing ocean acidification (OA), which affects calcifying organisms. Recent studies have shown that Padina pavonica investigated along a natural pCO2 gradient seems to acclimate to OA by reducing calcified structures and changing mineralogy from aragonite to calcium sulfate salts. The aim of the present study was to study the potential for acclimation of P. pavonica to OA along the same gradient and in aquaria under controlled conditions. P. pavonica was cross-transplanted for 1 week from a normal pH site (mean values of pHTS 8.1 and pCO2 = 391 μatm) to a low pH site (mean values of pHTS 7.4 and pCO2 = 1044 μatm) and vice versa. Results showed that this calcifying alga did survive under acute environmental pHTS changes but its calcification was significantly reduced. P. pavonica decalcified and changed mineralogy at pHTS 7.4, but once brought back at pHTS 8.1, it partially recovered the aragonite loss while preserving the calcium sulfate phases that formed under low pHTS. These results suggest that P. pavonica could be used as a bioindicator for monitoring OA as well as localized anthropogenic acidity fluctuations.

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Calcifying Response and Recovery Potential of the Brown Alga Padina pavonica under Ocean Acidification

Abstract

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Keywords

UN SDGs

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