The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Marine Science 5 (2018): 170, doi:10.3389/fmars.2018.00170. Understanding the mechanisms of coral calcification is critical for accurat...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10407 2023-05-15T17:50:57+02:00 The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite DeCarlo, Thomas M. Ren, Haojia Farfan, Gabriela A. 2018-05-15 https://hdl.handle.net/1912/10407 en_US eng Frontiers Media https://doi.org/10.3389/fmars.2018.00170 Frontiers in Marine Science 5 (2018): 170 https://hdl.handle.net/1912/10407 doi:10.3389/fmars.2018.00170 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Frontiers in Marine Science 5 (2018): 170 doi:10.3389/fmars.2018.00170 Article 2018 ftwhoas https://doi.org/10.3389/fmars.2018.00170 2022-05-28T23:00:25Z © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Marine Science 5 (2018): 170, doi:10.3389/fmars.2018.00170. Understanding the mechanisms of coral calcification is critical for accurately projecting coral reef futures under ocean acidification and warming. Recent suggestions that calcification is primarily controlled by organic molecules and the biological activity of the coral polyp imply that ocean acidification may not affect skeletal accretion. The basis for these suggestions relies heavily on correlating the presence of organic matter with the orientation and disorder of aragonite crystals in the skeleton, carrying the assumption that organic matter observed in the skeleton was produced by the polyp to control calcification. Here we use Raman spectroscopy to test whether there are differences in organic matter content between coral skeleton and abiogenic aragonites precipitated from seawater, both before and after thermal annealing (heating). We measured the background fluxorescence and intensity of C-H bonding signals in the Raman spectra, which are commonly attributed to coral polyp-derived skeletal organic matrix (SOM) and have been used to map its distribution. Surprisingly, we found no differences in either fluorescence or C-H bonding between abiogenic aragonite and coral skeleton. Annealing reduced the molecular disorder in coral skeleton, potentially due to removal of organic matter, but the same effect was also observed in the abiogenic aragonites. The presence of organic molecules in the abiogenic aragonites is further supported by measurements of N content and δ15N. Together, our data suggest that some of what has been interpreted in previous studies as polyp-derived SOM may actually be seawater-sourced organic matter or some other signal not unique to biogenic aragonite. Finally, we create a high-resolution Raman map of a Pocillopora skeleton to demonstrate how patterns of ... Article in Journal/Newspaper Ocean acidification Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Frontiers in Marine Science 5 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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language |
English |
description |
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Marine Science 5 (2018): 170, doi:10.3389/fmars.2018.00170. Understanding the mechanisms of coral calcification is critical for accurately projecting coral reef futures under ocean acidification and warming. Recent suggestions that calcification is primarily controlled by organic molecules and the biological activity of the coral polyp imply that ocean acidification may not affect skeletal accretion. The basis for these suggestions relies heavily on correlating the presence of organic matter with the orientation and disorder of aragonite crystals in the skeleton, carrying the assumption that organic matter observed in the skeleton was produced by the polyp to control calcification. Here we use Raman spectroscopy to test whether there are differences in organic matter content between coral skeleton and abiogenic aragonites precipitated from seawater, both before and after thermal annealing (heating). We measured the background fluxorescence and intensity of C-H bonding signals in the Raman spectra, which are commonly attributed to coral polyp-derived skeletal organic matrix (SOM) and have been used to map its distribution. Surprisingly, we found no differences in either fluorescence or C-H bonding between abiogenic aragonite and coral skeleton. Annealing reduced the molecular disorder in coral skeleton, potentially due to removal of organic matter, but the same effect was also observed in the abiogenic aragonites. The presence of organic molecules in the abiogenic aragonites is further supported by measurements of N content and δ15N. Together, our data suggest that some of what has been interpreted in previous studies as polyp-derived SOM may actually be seawater-sourced organic matter or some other signal not unique to biogenic aragonite. Finally, we create a high-resolution Raman map of a Pocillopora skeleton to demonstrate how patterns of ... |
format |
Article in Journal/Newspaper |
author |
DeCarlo, Thomas M. Ren, Haojia Farfan, Gabriela A. |
spellingShingle |
DeCarlo, Thomas M. Ren, Haojia Farfan, Gabriela A. The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
author_facet |
DeCarlo, Thomas M. Ren, Haojia Farfan, Gabriela A. |
author_sort |
DeCarlo, Thomas M. |
title |
The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
title_short |
The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
title_full |
The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
title_fullStr |
The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
title_full_unstemmed |
The origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
title_sort |
origin and role of organic matrix in coral calcification: insights from comparing coral skeleton and abiogenic aragonite |
publisher |
Frontiers Media |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10407 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science 5 (2018): 170 doi:10.3389/fmars.2018.00170 |
op_relation |
https://doi.org/10.3389/fmars.2018.00170 Frontiers in Marine Science 5 (2018): 170 https://hdl.handle.net/1912/10407 doi:10.3389/fmars.2018.00170 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2018.00170 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766157902745174016 |