Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification
Marine pCO2 enrichment via ocean acidification (OA), upwelling and release from carbon capture and storage (CCS) facilities is projected to have devastating impacts on marine biomineralisers and the services they provide. However, empirical studies using stable endpoint pCO2 concentrations find spec...
Published in: | Global Change Biology |
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Language: | English |
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School of Geographical and Earth Sciences, University of Glasgow, Glasgow, UK
2013
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-195864 https://doi.org/10.1111/gcb.12351 |
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ftumeauniv:oai:DiVA.org:umu-195864 2023-10-09T21:54:50+02:00 Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification Kamenos, Nicholas A. Burdett, Heidi L. Aloisio, Elena Findlay, Helen S. Martin, Sophie Longbone, Charlotte Dunn, Jonathan Widdicombe, Stephen Calosi, Piero 2013 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-195864 https://doi.org/10.1111/gcb.12351 eng eng School of Geographical and Earth Sciences, University of Glasgow, Glasgow, UK Global Change Biology, 1354-1013, 2013, 19:12, s. 3621-3628 orcid:0000-0003-3434-0807 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-195864 doi:10.1111/gcb.12351 PMID 23943376 ISI:000326836000006 Scopus 2-s2.0-84887458165 info:eu-repo/semantics/openAccess calcification coralline algae crustose coralline algae (CCA) maerl ocean acidification photosynthesis raman rate respiration rhodolith Climate Research Klimatforskning Ecology Ekologi Geochemistry Geokemi Article in journal info:eu-repo/semantics/article text 2013 ftumeauniv https://doi.org/10.1111/gcb.12351 2023-09-22T13:55:53Z Marine pCO2 enrichment via ocean acidification (OA), upwelling and release from carbon capture and storage (CCS) facilities is projected to have devastating impacts on marine biomineralisers and the services they provide. However, empirical studies using stable endpoint pCO2 concentrations find species exhibit variable biological and geochemical responses rather than the expected negative patterns. In addition, the carbonate chemistry of many marine systems is now being observed to be more variable than previously thought. To underpin more robust projections of future OA impacts on marine biomineralisers and their role in ecosystem service provision, we investigate coralline algal responses to realistically variable scenarios of marine pCO2 enrichment. Coralline algae are important in ecosystem function; providing habitats and nursery areas, hosting high biodiversity, stabilizing reef structures and contributing to the carbon cycle. Red coralline marine algae were exposed for 80 days to one of three pH treatments: (i) current pH (control); (ii) low pH (7.7) representing OA change; and (iii) an abrupt drop to low pH (7.7) representing the higher rates of pH change observed at natural vent systems, in areas of upwelling and during CCS releases. We demonstrate that red coralline algae respond differently to the rate and the magnitude of pH change induced by pCO2 enrichment. At low pH, coralline algae survived by increasing their calcification rates. However, when the change to low pH occurred at a fast rate we detected, using Raman spectroscopy, weaknesses in the calcite skeleton, with evidence of dissolution and molecular positional disorder. This suggests that, while coralline algae will continue to calcify, they may be structurally weakened, putting at risk the ecosystem services they provide. Notwithstanding evolutionary adaptation, the ability of coralline algae to cope with OA may thus be determined primarily by the rate, rather than magnitude, at which pCO2 enrichment occurs. Article in Journal/Newspaper Ocean acidification Umeå University: Publications (DiVA) Global Change Biology 19 12 3621 3628 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
calcification coralline algae crustose coralline algae (CCA) maerl ocean acidification photosynthesis raman rate respiration rhodolith Climate Research Klimatforskning Ecology Ekologi Geochemistry Geokemi |
spellingShingle |
calcification coralline algae crustose coralline algae (CCA) maerl ocean acidification photosynthesis raman rate respiration rhodolith Climate Research Klimatforskning Ecology Ekologi Geochemistry Geokemi Kamenos, Nicholas A. Burdett, Heidi L. Aloisio, Elena Findlay, Helen S. Martin, Sophie Longbone, Charlotte Dunn, Jonathan Widdicombe, Stephen Calosi, Piero Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
topic_facet |
calcification coralline algae crustose coralline algae (CCA) maerl ocean acidification photosynthesis raman rate respiration rhodolith Climate Research Klimatforskning Ecology Ekologi Geochemistry Geokemi |
description |
Marine pCO2 enrichment via ocean acidification (OA), upwelling and release from carbon capture and storage (CCS) facilities is projected to have devastating impacts on marine biomineralisers and the services they provide. However, empirical studies using stable endpoint pCO2 concentrations find species exhibit variable biological and geochemical responses rather than the expected negative patterns. In addition, the carbonate chemistry of many marine systems is now being observed to be more variable than previously thought. To underpin more robust projections of future OA impacts on marine biomineralisers and their role in ecosystem service provision, we investigate coralline algal responses to realistically variable scenarios of marine pCO2 enrichment. Coralline algae are important in ecosystem function; providing habitats and nursery areas, hosting high biodiversity, stabilizing reef structures and contributing to the carbon cycle. Red coralline marine algae were exposed for 80 days to one of three pH treatments: (i) current pH (control); (ii) low pH (7.7) representing OA change; and (iii) an abrupt drop to low pH (7.7) representing the higher rates of pH change observed at natural vent systems, in areas of upwelling and during CCS releases. We demonstrate that red coralline algae respond differently to the rate and the magnitude of pH change induced by pCO2 enrichment. At low pH, coralline algae survived by increasing their calcification rates. However, when the change to low pH occurred at a fast rate we detected, using Raman spectroscopy, weaknesses in the calcite skeleton, with evidence of dissolution and molecular positional disorder. This suggests that, while coralline algae will continue to calcify, they may be structurally weakened, putting at risk the ecosystem services they provide. Notwithstanding evolutionary adaptation, the ability of coralline algae to cope with OA may thus be determined primarily by the rate, rather than magnitude, at which pCO2 enrichment occurs. |
format |
Article in Journal/Newspaper |
author |
Kamenos, Nicholas A. Burdett, Heidi L. Aloisio, Elena Findlay, Helen S. Martin, Sophie Longbone, Charlotte Dunn, Jonathan Widdicombe, Stephen Calosi, Piero |
author_facet |
Kamenos, Nicholas A. Burdett, Heidi L. Aloisio, Elena Findlay, Helen S. Martin, Sophie Longbone, Charlotte Dunn, Jonathan Widdicombe, Stephen Calosi, Piero |
author_sort |
Kamenos, Nicholas A. |
title |
Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
title_short |
Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
title_full |
Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
title_fullStr |
Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
title_full_unstemmed |
Coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
title_sort |
coralline algal structure is more sensitive to rate, rather than the magnitude, of ocean acidification |
publisher |
School of Geographical and Earth Sciences, University of Glasgow, Glasgow, UK |
publishDate |
2013 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-195864 https://doi.org/10.1111/gcb.12351 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Global Change Biology, 1354-1013, 2013, 19:12, s. 3621-3628 orcid:0000-0003-3434-0807 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-195864 doi:10.1111/gcb.12351 PMID 23943376 ISI:000326836000006 Scopus 2-s2.0-84887458165 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.12351 |
container_title |
Global Change Biology |
container_volume |
19 |
container_issue |
12 |
container_start_page |
3621 |
op_container_end_page |
3628 |
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1779318560376487936 |