Impact of ocean acidification on calcifying marine organisms.
Recently, field and laboratory studies have demonstrated the significant impact of variations in seawater [CO2] and related changes in carbonate chemistry on both planktic and benthic marine calcifying organisms. (e.g. Bijma et al., 1999; Kleypas et al., 1999; Leclercq, 2000 et al., Riebesell et al....
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ftawi:oai:epic.awi.de:21080 2024-09-15T18:27:47+00:00 Impact of ocean acidification on calcifying marine organisms. Dissard, Delphine Bijma, Jelle da Rocha, Régine Elisabeth Nehrke, Gernot de Nooijer, Lennart Jan 2008 https://epic.awi.de/id/eprint/21080/ https://hdl.handle.net/10013/epic.33380 unknown Dissard, D. , Bijma, J. orcid:0000-0003-4371-1438 , da Rocha, R. E. , Nehrke, G. orcid:0000-0002-2851-3049 and de Nooijer, L. J. (2008) Impact of ocean acidification on calcifying marine organisms. , Second international symposium on the ocean in a high CO2 world (Monaco). . hdl:10013/epic.33380 EPIC3Second international symposium on the ocean in a high CO2 world (Monaco). Conference notRev 2008 ftawi 2024-06-24T04:01:33Z Recently, field and laboratory studies have demonstrated the significant impact of variations in seawater [CO2] and related changes in carbonate chemistry on both planktic and benthic marine calcifying organisms. (e.g. Bijma et al., 1999; Kleypas et al., 1999; Leclercq, 2000 et al., Riebesell et al., 2000; Zondervan et al., 2001; Delille et al., 2005; Gazeau et al., 2007). For foraminifera a model has been proposed to explain the calcification process (Bentov and Erez, 2005, 2006): Seawater is taken up via endocytosis and transported to the site of calcification. During transport the composition of the solution inside the vesicle is modified (concentrating Ca2+ while removing other divalent cations, notably Mg2+, and at the same time pumping H+ to acidic vesicles, thereby increasing pH and CO32- in the calcification vesicles). Because the calcification is based on ambient seawater, foraminifers are among the best recorders of paleo-proxies but it also explains why foraminifera are so sensitive to ocean acidification. A similar model has been proposed for corals (Erez, personal com.). The similarity in the ultra-structures of different calcifying organisms also suggests a common ancestral calcification mechanism. We report in more detail on the impact of ocean acidification on planktonic and benthic foraminifera, through controlled laboratory culture experiments. The impact was monitored by weighing shells and using SEM and AFM techniques. The overall aim of this study is to develop/improve a process based understanding of biocalcification in foraminifera which would allow predicting how these calcifiers cope with an acidifying ocean and which consequences this has for the structural properties of their skeletons. Conference Object Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Recently, field and laboratory studies have demonstrated the significant impact of variations in seawater [CO2] and related changes in carbonate chemistry on both planktic and benthic marine calcifying organisms. (e.g. Bijma et al., 1999; Kleypas et al., 1999; Leclercq, 2000 et al., Riebesell et al., 2000; Zondervan et al., 2001; Delille et al., 2005; Gazeau et al., 2007). For foraminifera a model has been proposed to explain the calcification process (Bentov and Erez, 2005, 2006): Seawater is taken up via endocytosis and transported to the site of calcification. During transport the composition of the solution inside the vesicle is modified (concentrating Ca2+ while removing other divalent cations, notably Mg2+, and at the same time pumping H+ to acidic vesicles, thereby increasing pH and CO32- in the calcification vesicles). Because the calcification is based on ambient seawater, foraminifers are among the best recorders of paleo-proxies but it also explains why foraminifera are so sensitive to ocean acidification. A similar model has been proposed for corals (Erez, personal com.). The similarity in the ultra-structures of different calcifying organisms also suggests a common ancestral calcification mechanism. We report in more detail on the impact of ocean acidification on planktonic and benthic foraminifera, through controlled laboratory culture experiments. The impact was monitored by weighing shells and using SEM and AFM techniques. The overall aim of this study is to develop/improve a process based understanding of biocalcification in foraminifera which would allow predicting how these calcifiers cope with an acidifying ocean and which consequences this has for the structural properties of their skeletons. |
format |
Conference Object |
author |
Dissard, Delphine Bijma, Jelle da Rocha, Régine Elisabeth Nehrke, Gernot de Nooijer, Lennart Jan |
spellingShingle |
Dissard, Delphine Bijma, Jelle da Rocha, Régine Elisabeth Nehrke, Gernot de Nooijer, Lennart Jan Impact of ocean acidification on calcifying marine organisms. |
author_facet |
Dissard, Delphine Bijma, Jelle da Rocha, Régine Elisabeth Nehrke, Gernot de Nooijer, Lennart Jan |
author_sort |
Dissard, Delphine |
title |
Impact of ocean acidification on calcifying marine organisms. |
title_short |
Impact of ocean acidification on calcifying marine organisms. |
title_full |
Impact of ocean acidification on calcifying marine organisms. |
title_fullStr |
Impact of ocean acidification on calcifying marine organisms. |
title_full_unstemmed |
Impact of ocean acidification on calcifying marine organisms. |
title_sort |
impact of ocean acidification on calcifying marine organisms. |
publishDate |
2008 |
url |
https://epic.awi.de/id/eprint/21080/ https://hdl.handle.net/10013/epic.33380 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Second international symposium on the ocean in a high CO2 world (Monaco). |
op_relation |
Dissard, D. , Bijma, J. orcid:0000-0003-4371-1438 , da Rocha, R. E. , Nehrke, G. orcid:0000-0002-2851-3049 and de Nooijer, L. J. (2008) Impact of ocean acidification on calcifying marine organisms. , Second international symposium on the ocean in a high CO2 world (Monaco). . hdl:10013/epic.33380 |
_version_ |
1810469053349756928 |