Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH
Increased CO2 emissions into the atmosphere lead to increased concentrations of dissolved CO2 in the ocean. A chemical reaction between the dissolved CO2 and seawater produces HCO3−, CO32− and H+ ions. These H+ ions increase the acidity of seawater and decrease the pH. Increased acidity and decrease...
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ftunisouthpac:oai:generic.eprints.org:10619 2023-05-15T17:50:42+02:00 Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH Naidu, Roselyn Hallock, Pamela Erez, Jonathan Maata, Matakite Leal Filho, Walter 2017 application/pdf http://repository.usp.ac.fj/10619/ http://repository.usp.ac.fj/10619/1/Book_chapter.pdf unknown Springer http://repository.usp.ac.fj/10619/1/Book_chapter.pdf Naidu, Roselyn and Hallock, Pamela and Erez, Jonathan and Maata, Matakite (2017) Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH. In: Climate Change Adaptation in Pacific Countries, Fostering Resilience and Improving the Quality of Life. Climate Change Management . Springer, Germany, pp. 137-150. ISBN 978-3-319-50093-5 QD Chemistry Book Chapter PeerReviewed 2017 ftunisouthpac 2019-09-06T08:27:03Z Increased CO2 emissions into the atmosphere lead to increased concentrations of dissolved CO2 in the ocean. A chemical reaction between the dissolved CO2 and seawater produces HCO3−, CO32− and H+ ions. These H+ ions increase the acidity of seawater and decrease the pH. Increased acidity and decreased availability of CO32− ion affect calcite and aragonite production by marine calcifiers in the ocean. To assess potential responses of the larger benthic foraminifer Marginopora vertebralis to ocean acidification, we performed growth experiments at three pH levels [7.5, 7.8, 8.1 (ambient seawater)] for 11 weeks. Specimens were stained with the fluorescent compound Calcein ( ̴40 µmole/l) prior to treatment, allowing identification of calcite added during the treatment period. At pH 8.1, specimens increased their test weight by 8.4%, at pH 7.8 growth was 4.2%, and at pH 7.5, growth was only 3.2%. These differences represent a significant relationship between ocean pH and test growth (i.e., calcification). In addition, several specimens in the pH 8.1 treatment underwent asexual reproduction during the experiment, while no reproduction was observed in the pH 7.8 or 7.5 treatments. These results indicate that ocean acidification predicted to occur by the end of the 21st century will cause a decline in population densities of Marginopora vertebralis in their natural environment, as consequences of both reduced growth rates and rates of reproduction. And because the tests of these foraminifers are important components of carbonate sediments on coral cays and tropical beaches, a decline in their rates of sediment production will exacerbate the consequences of rising sea level Book Part Ocean acidification The University of South Pacific: USP Electronic Research Repository |
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The University of South Pacific: USP Electronic Research Repository |
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ftunisouthpac |
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unknown |
topic |
QD Chemistry |
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QD Chemistry Naidu, Roselyn Hallock, Pamela Erez, Jonathan Maata, Matakite Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
topic_facet |
QD Chemistry |
description |
Increased CO2 emissions into the atmosphere lead to increased concentrations of dissolved CO2 in the ocean. A chemical reaction between the dissolved CO2 and seawater produces HCO3−, CO32− and H+ ions. These H+ ions increase the acidity of seawater and decrease the pH. Increased acidity and decreased availability of CO32− ion affect calcite and aragonite production by marine calcifiers in the ocean. To assess potential responses of the larger benthic foraminifer Marginopora vertebralis to ocean acidification, we performed growth experiments at three pH levels [7.5, 7.8, 8.1 (ambient seawater)] for 11 weeks. Specimens were stained with the fluorescent compound Calcein ( ̴40 µmole/l) prior to treatment, allowing identification of calcite added during the treatment period. At pH 8.1, specimens increased their test weight by 8.4%, at pH 7.8 growth was 4.2%, and at pH 7.5, growth was only 3.2%. These differences represent a significant relationship between ocean pH and test growth (i.e., calcification). In addition, several specimens in the pH 8.1 treatment underwent asexual reproduction during the experiment, while no reproduction was observed in the pH 7.8 or 7.5 treatments. These results indicate that ocean acidification predicted to occur by the end of the 21st century will cause a decline in population densities of Marginopora vertebralis in their natural environment, as consequences of both reduced growth rates and rates of reproduction. And because the tests of these foraminifers are important components of carbonate sediments on coral cays and tropical beaches, a decline in their rates of sediment production will exacerbate the consequences of rising sea level |
author2 |
Leal Filho, Walter |
format |
Book Part |
author |
Naidu, Roselyn Hallock, Pamela Erez, Jonathan Maata, Matakite |
author_facet |
Naidu, Roselyn Hallock, Pamela Erez, Jonathan Maata, Matakite |
author_sort |
Naidu, Roselyn |
title |
Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
title_short |
Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
title_full |
Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
title_fullStr |
Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
title_full_unstemmed |
Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH |
title_sort |
response of marginopora vertebralis (foraminifera) from laucala bay, fiji,to changing ocean ph |
publisher |
Springer |
publishDate |
2017 |
url |
http://repository.usp.ac.fj/10619/ http://repository.usp.ac.fj/10619/1/Book_chapter.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://repository.usp.ac.fj/10619/1/Book_chapter.pdf Naidu, Roselyn and Hallock, Pamela and Erez, Jonathan and Maata, Matakite (2017) Response of Marginopora vertebralis (Foraminifera) from Laucala Bay, Fiji,to Changing Ocean pH. In: Climate Change Adaptation in Pacific Countries, Fostering Resilience and Improving the Quality of Life. Climate Change Management . Springer, Germany, pp. 137-150. ISBN 978-3-319-50093-5 |
_version_ |
1766157570817392640 |