Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification
Foraminifera are expected to be particularly susceptible to future changes in ocean carbonate chemistry as a function of increased atmospheric CO(2). Studies in an experimental recirculating seawater system were performed with a dominant benthic foraminiferal species collected from intertidal mudfla...
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ftpubmed:oai:pubmedcentral.nih.gov:6703850 2023-05-15T17:50:07+02:00 Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification Guamán-Guevara, Fabricio Austin, Heather Hicks, Natalie Streeter, Richard Austin, William E. N. 2019-08-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6703850/ http://www.ncbi.nlm.nih.gov/pubmed/31433797 https://doi.org/10.1371/journal.pone.0220046 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6703850/ http://www.ncbi.nlm.nih.gov/pubmed/31433797 http://dx.doi.org/10.1371/journal.pone.0220046 © 2019 Guamán-Guevara et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2019 ftpubmed https://doi.org/10.1371/journal.pone.0220046 2019-09-08T00:35:53Z Foraminifera are expected to be particularly susceptible to future changes in ocean carbonate chemistry as a function of increased atmospheric CO(2). Studies in an experimental recirculating seawater system were performed with a dominant benthic foraminiferal species collected from intertidal mudflats. We investigated the experimental impacts of ocean acidification on survival, growth/calcification, morphology and the biometric features of a calcareous species Elphidium williamsoni. Foraminifera were exposed for 6 weeks to four different pH treatments that replicated future scenarios of a high CO(2) atmosphere resulting in lower seawater pH. Results revealed that declining seawater pH caused a decline in foraminiferal survival rate and growth/calcification (mainly through test weight reduction). Scanning electron microscopy image analysis of live specimens at the end of the experimental period show changes in foraminiferal morphology with clear signs of corrosion and cracking on the test surface, septal bridges, sutures and feeding structures of specimens exposed to the lowest pH conditions. These findings suggest that the morphological changes observed in shell feeding structures may serve to alter: (1) foraminiferal feeding efficiency and their long-term ecological competitiveness, (2) the energy transferred within the benthic food web with a subsequent shift in benthic community structures and (3) carbon cycling and total CaCO(3) production, both highly significant processes in coastal waters. These experimental results open-up the possibility of modelling future impacts of ocean acidification on both calcification and dissolution in benthic foraminifera within mid-latitude intertidal environments, with potential implications for understanding the changing marine carbon cycle. Text Ocean acidification PubMed Central (PMC) PLOS ONE 14 8 e0220046 |
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Research Article Guamán-Guevara, Fabricio Austin, Heather Hicks, Natalie Streeter, Richard Austin, William E. N. Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
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Research Article |
description |
Foraminifera are expected to be particularly susceptible to future changes in ocean carbonate chemistry as a function of increased atmospheric CO(2). Studies in an experimental recirculating seawater system were performed with a dominant benthic foraminiferal species collected from intertidal mudflats. We investigated the experimental impacts of ocean acidification on survival, growth/calcification, morphology and the biometric features of a calcareous species Elphidium williamsoni. Foraminifera were exposed for 6 weeks to four different pH treatments that replicated future scenarios of a high CO(2) atmosphere resulting in lower seawater pH. Results revealed that declining seawater pH caused a decline in foraminiferal survival rate and growth/calcification (mainly through test weight reduction). Scanning electron microscopy image analysis of live specimens at the end of the experimental period show changes in foraminiferal morphology with clear signs of corrosion and cracking on the test surface, septal bridges, sutures and feeding structures of specimens exposed to the lowest pH conditions. These findings suggest that the morphological changes observed in shell feeding structures may serve to alter: (1) foraminiferal feeding efficiency and their long-term ecological competitiveness, (2) the energy transferred within the benthic food web with a subsequent shift in benthic community structures and (3) carbon cycling and total CaCO(3) production, both highly significant processes in coastal waters. These experimental results open-up the possibility of modelling future impacts of ocean acidification on both calcification and dissolution in benthic foraminifera within mid-latitude intertidal environments, with potential implications for understanding the changing marine carbon cycle. |
format |
Text |
author |
Guamán-Guevara, Fabricio Austin, Heather Hicks, Natalie Streeter, Richard Austin, William E. N. |
author_facet |
Guamán-Guevara, Fabricio Austin, Heather Hicks, Natalie Streeter, Richard Austin, William E. N. |
author_sort |
Guamán-Guevara, Fabricio |
title |
Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
title_short |
Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
title_full |
Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
title_fullStr |
Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
title_full_unstemmed |
Impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
title_sort |
impacts of ocean acidification on intertidal benthic foraminiferal growth and calcification |
publisher |
Public Library of Science |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6703850/ http://www.ncbi.nlm.nih.gov/pubmed/31433797 https://doi.org/10.1371/journal.pone.0220046 |
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Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6703850/ http://www.ncbi.nlm.nih.gov/pubmed/31433797 http://dx.doi.org/10.1371/journal.pone.0220046 |
op_rights |
© 2019 Guamán-Guevara et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
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https://doi.org/10.1371/journal.pone.0220046 |
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PLOS ONE |
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14 |
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