Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers
Ocean acidification (decreases in carbonate ion concentration and pH) in response to rising atmospheric p CO 2 is generally expected to reduce rates of calcification by reef calcifying organisms, with potentially severe implications for coral reef ecosystems. Large, algal symbiont-bearing benthic fo...
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ftdoajarticles:oai:doaj.org/article:e45a6c9bcf4847639ce7d346e0e1f01b 2023-05-15T17:49:57+02:00 Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers K. Fujita M. Hikami A. Suzuki A. Kuroyanagi K. Sakai H. Kawahata Y. Nojiri 2011-08-01T00:00:00Z https://doi.org/10.5194/bg-8-2089-2011 https://doaj.org/article/e45a6c9bcf4847639ce7d346e0e1f01b EN eng Copernicus Publications http://www.biogeosciences.net/8/2089/2011/bg-8-2089-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-2089-2011 1726-4170 1726-4189 https://doaj.org/article/e45a6c9bcf4847639ce7d346e0e1f01b Biogeosciences, Vol 8, Iss 8, Pp 2089-2098 (2011) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2011 ftdoajarticles https://doi.org/10.5194/bg-8-2089-2011 2022-12-31T00:00:48Z Ocean acidification (decreases in carbonate ion concentration and pH) in response to rising atmospheric p CO 2 is generally expected to reduce rates of calcification by reef calcifying organisms, with potentially severe implications for coral reef ecosystems. Large, algal symbiont-bearing benthic foraminifers, which are important primary and carbonate producers in coral reefs, produce high-Mg calcite shells, whose solubility can exceed that of aragonite produced by corals, making them the "first responder" in coral reefs to the decreasing carbonate saturation state of seawater. Here we report results of culture experiments performed to assess the effects of ongoing ocean acidification on the calcification of symbiont-bearing reef foraminifers using a high-precision p CO 2 control system. Living clone individuals of three foraminiferal species ( Baculogypsina sphaerulata , Calcarina gaudichaudii , and Amphisorus hemprichii ) were subjected to seawater at five p CO 2 levels from 260 to 970 μatm. Cultured individuals were maintained for about 12 weeks in an indoor flow-through system under constant water temperature, light intensity, and photoperiod. After the experiments, the shell diameter and weight of each cultured specimen were measured. Net calcification of B. sphaerulata and C. gaudichaudii , which secrete a hyaline shell and host diatom symbionts, increased under intermediate levels of p CO 2 (580 and/or 770 μatm) and decreased at a higher p CO 2 level (970 μatm). Net calcification of A. hemprichii , which secretes a porcelaneous shell and hosts dinoflagellate symbionts, tended to decrease at elevated p CO 2 . Observed different responses between hyaline and porcelaneous species are possibly caused by the relative importance of elevated p CO 2 , which induces CO 2 fertilization effects by algal symbionts, versus associated changes in seawater carbonate chemistry, which decreases a carbonate concentration. Our findings suggest that ongoing ocean acidification might favor symbiont-bearing reef foraminifers ... Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 8 8 2089 2098 |
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English |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 K. Fujita M. Hikami A. Suzuki A. Kuroyanagi K. Sakai H. Kawahata Y. Nojiri Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Ocean acidification (decreases in carbonate ion concentration and pH) in response to rising atmospheric p CO 2 is generally expected to reduce rates of calcification by reef calcifying organisms, with potentially severe implications for coral reef ecosystems. Large, algal symbiont-bearing benthic foraminifers, which are important primary and carbonate producers in coral reefs, produce high-Mg calcite shells, whose solubility can exceed that of aragonite produced by corals, making them the "first responder" in coral reefs to the decreasing carbonate saturation state of seawater. Here we report results of culture experiments performed to assess the effects of ongoing ocean acidification on the calcification of symbiont-bearing reef foraminifers using a high-precision p CO 2 control system. Living clone individuals of three foraminiferal species ( Baculogypsina sphaerulata , Calcarina gaudichaudii , and Amphisorus hemprichii ) were subjected to seawater at five p CO 2 levels from 260 to 970 μatm. Cultured individuals were maintained for about 12 weeks in an indoor flow-through system under constant water temperature, light intensity, and photoperiod. After the experiments, the shell diameter and weight of each cultured specimen were measured. Net calcification of B. sphaerulata and C. gaudichaudii , which secrete a hyaline shell and host diatom symbionts, increased under intermediate levels of p CO 2 (580 and/or 770 μatm) and decreased at a higher p CO 2 level (970 μatm). Net calcification of A. hemprichii , which secretes a porcelaneous shell and hosts dinoflagellate symbionts, tended to decrease at elevated p CO 2 . Observed different responses between hyaline and porcelaneous species are possibly caused by the relative importance of elevated p CO 2 , which induces CO 2 fertilization effects by algal symbionts, versus associated changes in seawater carbonate chemistry, which decreases a carbonate concentration. Our findings suggest that ongoing ocean acidification might favor symbiont-bearing reef foraminifers ... |
format |
Article in Journal/Newspaper |
author |
K. Fujita M. Hikami A. Suzuki A. Kuroyanagi K. Sakai H. Kawahata Y. Nojiri |
author_facet |
K. Fujita M. Hikami A. Suzuki A. Kuroyanagi K. Sakai H. Kawahata Y. Nojiri |
author_sort |
K. Fujita |
title |
Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
title_short |
Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
title_full |
Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
title_fullStr |
Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
title_full_unstemmed |
Effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
title_sort |
effects of ocean acidification on calcification of symbiont-bearing reef foraminifers |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/bg-8-2089-2011 https://doaj.org/article/e45a6c9bcf4847639ce7d346e0e1f01b |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Biogeosciences, Vol 8, Iss 8, Pp 2089-2098 (2011) |
op_relation |
http://www.biogeosciences.net/8/2089/2011/bg-8-2089-2011.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-8-2089-2011 1726-4170 1726-4189 https://doaj.org/article/e45a6c9bcf4847639ce7d346e0e1f01b |
op_doi |
https://doi.org/10.5194/bg-8-2089-2011 |
container_title |
Biogeosciences |
container_volume |
8 |
container_issue |
8 |
container_start_page |
2089 |
op_container_end_page |
2098 |
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1766156480801669120 |