Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus
Negative impacts of global climate change are predicted for a range of taxa. Projections predict marked increases in sea surface temperatures and ocean acidification (OA), arguably placing calcifying organisms at most risk. While detrimental impacts of environmental change on the growth and ultrastr...
Published in: | Frontiers in Marine Science |
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Language: | English |
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2020
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Online Access: | http://hdl.handle.net/10026.1/16569 https://doi.org/10.3389/fmars.2020.567228 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/16569 2023-05-15T17:49:44+02:00 Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus Knights, A Norton, M Lemasson, A Stephen, N 2020-10-08 http://hdl.handle.net/10026.1/16569 https://doi.org/10.3389/fmars.2020.567228 en eng Frontiers Media ISSN:2296-7745 2296-7745 http://hdl.handle.net/10026.1/16569 doi:10.3389/fmars.2020.567228 2020-10-21 Not known Journal Article 2020 ftunivplympearl https://doi.org/10.3389/fmars.2020.567228 2021-03-09T18:37:34Z Negative impacts of global climate change are predicted for a range of taxa. Projections predict marked increases in sea surface temperatures and ocean acidification (OA), arguably placing calcifying organisms at most risk. While detrimental impacts of environmental change on the growth and ultrastructure of bivalve mollusc shells have been shown, rapid and diel fluctuations in pH typical of coastal systems are often not considered. Mytilus edulis, an economically important marine calcifier vulnerable to climate change, were exposed to current and future ocean acidification (380 ppm and 1000 ppm pCO2), warming (17°C; 20°C), and ocean acidification and warming (OAW) scenarios in a seawater system incorporating natural fluctuations in pH. Both macroscopic morphometrics (length, width, height, volume) and microscopic changes in the crystalline structure of shells (ultrastructure) using electron backscatter diffraction (EBSD) were measured over time. Increases in seawater temperature and OAW scenarios led to increased and decreased shell growth respectively and on marginal changes in cavity volumes. Shell crystal matrices became disordered shifting toward preferred alignment under elevated temperatures indicating restricted growth, whereas Mytilus grown under OAW scenarios maintained single crystal fabrics suggesting OA may ameliorate some of the negative consequences of temperature increases. However, both elevated temperature and OAW led to significant increases in crystal size (grain area and diameter) and misorientation frequencies, suggesting a propensity toward increased shell brittleness. Results suggest adult Mytilus may become more susceptible to biological determinants of survival in the future, altering ecosystem structure and functioning. Article in Journal/Newspaper Ocean acidification PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Frontiers in Marine Science 7 |
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Open Polar |
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PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
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ftunivplympearl |
language |
English |
description |
Negative impacts of global climate change are predicted for a range of taxa. Projections predict marked increases in sea surface temperatures and ocean acidification (OA), arguably placing calcifying organisms at most risk. While detrimental impacts of environmental change on the growth and ultrastructure of bivalve mollusc shells have been shown, rapid and diel fluctuations in pH typical of coastal systems are often not considered. Mytilus edulis, an economically important marine calcifier vulnerable to climate change, were exposed to current and future ocean acidification (380 ppm and 1000 ppm pCO2), warming (17°C; 20°C), and ocean acidification and warming (OAW) scenarios in a seawater system incorporating natural fluctuations in pH. Both macroscopic morphometrics (length, width, height, volume) and microscopic changes in the crystalline structure of shells (ultrastructure) using electron backscatter diffraction (EBSD) were measured over time. Increases in seawater temperature and OAW scenarios led to increased and decreased shell growth respectively and on marginal changes in cavity volumes. Shell crystal matrices became disordered shifting toward preferred alignment under elevated temperatures indicating restricted growth, whereas Mytilus grown under OAW scenarios maintained single crystal fabrics suggesting OA may ameliorate some of the negative consequences of temperature increases. However, both elevated temperature and OAW led to significant increases in crystal size (grain area and diameter) and misorientation frequencies, suggesting a propensity toward increased shell brittleness. Results suggest adult Mytilus may become more susceptible to biological determinants of survival in the future, altering ecosystem structure and functioning. |
format |
Article in Journal/Newspaper |
author |
Knights, A Norton, M Lemasson, A Stephen, N |
spellingShingle |
Knights, A Norton, M Lemasson, A Stephen, N Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
author_facet |
Knights, A Norton, M Lemasson, A Stephen, N |
author_sort |
Knights, A |
title |
Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
title_short |
Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
title_full |
Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
title_fullStr |
Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
title_full_unstemmed |
Ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of Mytilus |
title_sort |
ocean acidification mitigates the negative effects of increased sea temperatures on the biomineralisation and crystalline ultrastructure of mytilus |
publisher |
Frontiers Media |
publishDate |
2020 |
url |
http://hdl.handle.net/10026.1/16569 https://doi.org/10.3389/fmars.2020.567228 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
ISSN:2296-7745 2296-7745 http://hdl.handle.net/10026.1/16569 doi:10.3389/fmars.2020.567228 |
op_rights |
2020-10-21 Not known |
op_doi |
https://doi.org/10.3389/fmars.2020.567228 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766156182224896000 |