Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean
Rhodoliths are free-living coralline algae (Rhodophyta, Corallinales) that are ecologically important for the functioning of marine environments. They form extensive beds distributed worldwide, providing a habitat and nursery for benthic organisms and space for fisheries, and are an important source...
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ftpubmed:oai:pubmedcentral.nih.gov:3869012 2023-05-15T18:20:58+02:00 Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean Cavalcanti, Giselle S Gregoracci, Gustavo B dos Santos, Eidy O Silveira, Cynthia B Meirelles, Pedro M Longo, Leila Gotoh, Kazuyoshi Nakamura, Shota Iida, Tetsuya Sawabe, Tomoo Rezende, Carlos E Francini-Filho, Ronaldo B Moura, Rodrigo L Amado-Filho, Gilberto M Thompson, Fabiano L 2014-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3869012 http://www.ncbi.nlm.nih.gov/pubmed/23985749 https://doi.org/10.1038/ismej.2013.133 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/23985749 http://dx.doi.org/10.1038/ismej.2013.133 Copyright © 2014 International Society for Microbial Ecology Original Article Text 2014 ftpubmed https://doi.org/10.1038/ismej.2013.133 2015-01-04T00:55:31Z Rhodoliths are free-living coralline algae (Rhodophyta, Corallinales) that are ecologically important for the functioning of marine environments. They form extensive beds distributed worldwide, providing a habitat and nursery for benthic organisms and space for fisheries, and are an important source of calcium carbonate. The Abrolhos Bank, off eastern Brazil, harbors the world's largest continuous rhodolith bed (of ∼21 000 km2) and has one of the largest marine CaCO3 deposits (producing 25 megatons of CaCO3 per year). Nevertheless, there is a lack of information about the microbial diversity, photosynthetic potential and ecological interactions within the rhodolith holobiont. Herein, we performed an ecophysiologic and metagenomic analysis of the Abrolhos rhodoliths to understand their microbial composition and functional components. Rhodoliths contained a specific microbiome that displayed a significant enrichment in aerobic ammonia-oxidizing betaproteobacteria and dissimilative sulfate-reducing deltaproteobacteria. We also observed a significant contribution of bacterial guilds (that is, photolithoautotrophs, anaerobic heterotrophs, sulfide oxidizers, anoxygenic phototrophs and methanogens) in the rhodolith metagenome, suggested to have important roles in biomineralization. The increased hits in aromatic compounds, fatty acid and secondary metabolism subsystems hint at an important chemically mediated interaction in which a functional job partition among eukaryal, archaeal and bacterial groups allows the rhodolith holobiont to thrive in the global ocean. High rates of photosynthesis were measured for Abrolhos rhodoliths (52.16 μmol carbon m−2 s−1), allowing the entire Abrolhos rhodolith bed to produce 5.65 × 105 tons C per day. This estimate illustrates the great importance of the Abrolhos rhodolith beds for dissolved carbon production in the South Atlantic Ocean. Text South Atlantic Ocean PubMed Central (PMC) The ISME Journal 8 1 52 62 |
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Original Article Cavalcanti, Giselle S Gregoracci, Gustavo B dos Santos, Eidy O Silveira, Cynthia B Meirelles, Pedro M Longo, Leila Gotoh, Kazuyoshi Nakamura, Shota Iida, Tetsuya Sawabe, Tomoo Rezende, Carlos E Francini-Filho, Ronaldo B Moura, Rodrigo L Amado-Filho, Gilberto M Thompson, Fabiano L Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
topic_facet |
Original Article |
description |
Rhodoliths are free-living coralline algae (Rhodophyta, Corallinales) that are ecologically important for the functioning of marine environments. They form extensive beds distributed worldwide, providing a habitat and nursery for benthic organisms and space for fisheries, and are an important source of calcium carbonate. The Abrolhos Bank, off eastern Brazil, harbors the world's largest continuous rhodolith bed (of ∼21 000 km2) and has one of the largest marine CaCO3 deposits (producing 25 megatons of CaCO3 per year). Nevertheless, there is a lack of information about the microbial diversity, photosynthetic potential and ecological interactions within the rhodolith holobiont. Herein, we performed an ecophysiologic and metagenomic analysis of the Abrolhos rhodoliths to understand their microbial composition and functional components. Rhodoliths contained a specific microbiome that displayed a significant enrichment in aerobic ammonia-oxidizing betaproteobacteria and dissimilative sulfate-reducing deltaproteobacteria. We also observed a significant contribution of bacterial guilds (that is, photolithoautotrophs, anaerobic heterotrophs, sulfide oxidizers, anoxygenic phototrophs and methanogens) in the rhodolith metagenome, suggested to have important roles in biomineralization. The increased hits in aromatic compounds, fatty acid and secondary metabolism subsystems hint at an important chemically mediated interaction in which a functional job partition among eukaryal, archaeal and bacterial groups allows the rhodolith holobiont to thrive in the global ocean. High rates of photosynthesis were measured for Abrolhos rhodoliths (52.16 μmol carbon m−2 s−1), allowing the entire Abrolhos rhodolith bed to produce 5.65 × 105 tons C per day. This estimate illustrates the great importance of the Abrolhos rhodolith beds for dissolved carbon production in the South Atlantic Ocean. |
format |
Text |
author |
Cavalcanti, Giselle S Gregoracci, Gustavo B dos Santos, Eidy O Silveira, Cynthia B Meirelles, Pedro M Longo, Leila Gotoh, Kazuyoshi Nakamura, Shota Iida, Tetsuya Sawabe, Tomoo Rezende, Carlos E Francini-Filho, Ronaldo B Moura, Rodrigo L Amado-Filho, Gilberto M Thompson, Fabiano L |
author_facet |
Cavalcanti, Giselle S Gregoracci, Gustavo B dos Santos, Eidy O Silveira, Cynthia B Meirelles, Pedro M Longo, Leila Gotoh, Kazuyoshi Nakamura, Shota Iida, Tetsuya Sawabe, Tomoo Rezende, Carlos E Francini-Filho, Ronaldo B Moura, Rodrigo L Amado-Filho, Gilberto M Thompson, Fabiano L |
author_sort |
Cavalcanti, Giselle S |
title |
Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
title_short |
Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
title_full |
Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
title_fullStr |
Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
title_full_unstemmed |
Physiologic and metagenomic attributes of the rhodoliths forming the largest CaCO3 bed in the South Atlantic Ocean |
title_sort |
physiologic and metagenomic attributes of the rhodoliths forming the largest caco3 bed in the south atlantic ocean |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3869012 http://www.ncbi.nlm.nih.gov/pubmed/23985749 https://doi.org/10.1038/ismej.2013.133 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/23985749 http://dx.doi.org/10.1038/ismej.2013.133 |
op_rights |
Copyright © 2014 International Society for Microbial Ecology |
op_doi |
https://doi.org/10.1038/ismej.2013.133 |
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The ISME Journal |
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8 |
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1 |
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52 |
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62 |
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1766199942699810816 |