Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification
Abstract Coralline algae constitute one of the main groups of highly vulnerable calcified benthic organisms to ocean acidification. Although damaging effects of seawater acidification on the coralline algae skeleton have been widely demonstrated, the susceptibility to dissolution varies according to...
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ftdoajarticles:oai:doaj.org/article:b086ac54f5764e54a599782048abed1c 2023-05-15T17:49:54+02:00 Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification Rodrigo Tomazetto de Carvalho Gustavo Miranda Rocha Claudia Santiago Karez Ricardo da Gama Bahia Renato Crespo Pereira Alex Cardoso Bastos Leonardo Tavares Salgado 2022-06-01T00:00:00Z https://doi.org/10.1038/s41598-022-13731-y https://doaj.org/article/b086ac54f5764e54a599782048abed1c EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-13731-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-13731-y 2045-2322 https://doaj.org/article/b086ac54f5764e54a599782048abed1c Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-13731-y 2022-12-31T03:12:57Z Abstract Coralline algae constitute one of the main groups of highly vulnerable calcified benthic organisms to ocean acidification. Although damaging effects of seawater acidification on the coralline algae skeleton have been widely demonstrated, the susceptibility to dissolution varies according to the Mg2+ in the calcite lattice. Even though the Southwest Atlantic Ocean exhibits the world’s largest rhodolith beds, which occupies 20,902 km2, there is no information regarding the coralline algae species mineralogy in this area. Here, we provide mineralogical data of twenty-four coralline algae species, examine the similarity in taxonomic groups, spatial occurrence and the vulnerability of these algae to seawater acidification. Mineralogy revealed that coralline algae skeletons were mainly composed of high-Mg calcite (> 70%) with minor presence of aragonite (< 30%) and dolomite (< 3%). There were no similarities between the skeletal mineralogy of taxonomic groups and sampling regions. Remarkably, the mean Mg-substitution of encrusting coralline algae from the Brazilian Shelf was 46.3% higher than global average. Because of the higher mean Mg-substitution in calcite compared with worldwide coralline algae, these algae from Southwest Atlantic Ocean would be highly susceptible to dissolution caused by the expected near-future ocean acidification and will compromise CaCO3 net production across the Brazilian Shelf. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Scientific Reports 12 1 |
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Medicine R Science Q Rodrigo Tomazetto de Carvalho Gustavo Miranda Rocha Claudia Santiago Karez Ricardo da Gama Bahia Renato Crespo Pereira Alex Cardoso Bastos Leonardo Tavares Salgado Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
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Medicine R Science Q |
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Abstract Coralline algae constitute one of the main groups of highly vulnerable calcified benthic organisms to ocean acidification. Although damaging effects of seawater acidification on the coralline algae skeleton have been widely demonstrated, the susceptibility to dissolution varies according to the Mg2+ in the calcite lattice. Even though the Southwest Atlantic Ocean exhibits the world’s largest rhodolith beds, which occupies 20,902 km2, there is no information regarding the coralline algae species mineralogy in this area. Here, we provide mineralogical data of twenty-four coralline algae species, examine the similarity in taxonomic groups, spatial occurrence and the vulnerability of these algae to seawater acidification. Mineralogy revealed that coralline algae skeletons were mainly composed of high-Mg calcite (> 70%) with minor presence of aragonite (< 30%) and dolomite (< 3%). There were no similarities between the skeletal mineralogy of taxonomic groups and sampling regions. Remarkably, the mean Mg-substitution of encrusting coralline algae from the Brazilian Shelf was 46.3% higher than global average. Because of the higher mean Mg-substitution in calcite compared with worldwide coralline algae, these algae from Southwest Atlantic Ocean would be highly susceptible to dissolution caused by the expected near-future ocean acidification and will compromise CaCO3 net production across the Brazilian Shelf. |
format |
Article in Journal/Newspaper |
author |
Rodrigo Tomazetto de Carvalho Gustavo Miranda Rocha Claudia Santiago Karez Ricardo da Gama Bahia Renato Crespo Pereira Alex Cardoso Bastos Leonardo Tavares Salgado |
author_facet |
Rodrigo Tomazetto de Carvalho Gustavo Miranda Rocha Claudia Santiago Karez Ricardo da Gama Bahia Renato Crespo Pereira Alex Cardoso Bastos Leonardo Tavares Salgado |
author_sort |
Rodrigo Tomazetto de Carvalho |
title |
Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
title_short |
Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
title_full |
Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
title_fullStr |
Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
title_full_unstemmed |
Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification |
title_sort |
global assessment of coralline algae mineralogy points to high vulnerability of southwestern atlantic reefs and rhodolith beds to ocean acidification |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-13731-y https://doaj.org/article/b086ac54f5764e54a599782048abed1c |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-11 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-13731-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-13731-y 2045-2322 https://doaj.org/article/b086ac54f5764e54a599782048abed1c |
op_doi |
https://doi.org/10.1038/s41598-022-13731-y |
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Scientific Reports |
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12 |
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1 |
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1766156411177271296 |