Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria
Planktonic Foraminifera and thecosome pteropods are major producers of calcite and aragonite in the ocean and play an important role for pelagic carbonate flux. The responses of planktonic foraminifers to ocean acidification (OA) are variable among the species tested and so far do not allow for reli...
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ftoceanrep:oai:oceanrep.geomar.de:44422 2023-05-15T17:30:53+02:00 Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria Lischka, Silke Stange, Paul Riebesell, Ulf 2018-10-24 text https://oceanrep.geomar.de/id/eprint/44422/ https://oceanrep.geomar.de/id/eprint/44422/1/fmars-05-00379.pdf https://doi.org/10.3389/fmars.2018.00379 en eng Frontiers https://oceanrep.geomar.de/id/eprint/44422/1/fmars-05-00379.pdf Lischka, S. , Stange, P. and Riebesell, U. (2018) Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria. Open Access Frontiers in Marine Science, 5 . Art.Nr. 379. DOI 10.3389/fmars.2018.00379 <https://doi.org/10.3389/fmars.2018.00379>. doi:10.3389/fmars.2018.00379 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.3389/fmars.2018.00379 2023-04-07T15:41:35Z Planktonic Foraminifera and thecosome pteropods are major producers of calcite and aragonite in the ocean and play an important role for pelagic carbonate flux. The responses of planktonic foraminifers to ocean acidification (OA) are variable among the species tested and so far do not allow for reliable conclusion. Thecosome pteropods respond with reduced calcification and shell dissolution to OA and are considered at high risk especially at high latitudes. The present investigation was part of a large-scale in situ mesocosm experiment in the oligotrophic waters of the eastern subtropical North Atlantic. Over 62 days, we measured the abundance and vertical flux of pelagic foraminifers and thecosome pteropods as part of a natural plankton community over a range of OA scenarios. A bloom phase was initiated by the introduction of deep-water collected from approx. 650 m depth simulating a natural up-welling event. Foraminifers occurred throughout the entire experiment in both the water column and the sediment traps. Pteropods were present only in small numbers and disappeared after the first two weeks of the experiment. No significant CO2 related effects were observed for foraminifers, but cumulative sedimentary flux was reduced at the highest CO2 concentrations. This flux reduction was most likely accompanying an observed flux reduction of particulate organic matter (POM) so that less foraminifers were intercepted and transported downward. Article in Journal/Newspaper North Atlantic Ocean acidification Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Frontiers in Marine Science 5 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Planktonic Foraminifera and thecosome pteropods are major producers of calcite and aragonite in the ocean and play an important role for pelagic carbonate flux. The responses of planktonic foraminifers to ocean acidification (OA) are variable among the species tested and so far do not allow for reliable conclusion. Thecosome pteropods respond with reduced calcification and shell dissolution to OA and are considered at high risk especially at high latitudes. The present investigation was part of a large-scale in situ mesocosm experiment in the oligotrophic waters of the eastern subtropical North Atlantic. Over 62 days, we measured the abundance and vertical flux of pelagic foraminifers and thecosome pteropods as part of a natural plankton community over a range of OA scenarios. A bloom phase was initiated by the introduction of deep-water collected from approx. 650 m depth simulating a natural up-welling event. Foraminifers occurred throughout the entire experiment in both the water column and the sediment traps. Pteropods were present only in small numbers and disappeared after the first two weeks of the experiment. No significant CO2 related effects were observed for foraminifers, but cumulative sedimentary flux was reduced at the highest CO2 concentrations. This flux reduction was most likely accompanying an observed flux reduction of particulate organic matter (POM) so that less foraminifers were intercepted and transported downward. |
format |
Article in Journal/Newspaper |
author |
Lischka, Silke Stange, Paul Riebesell, Ulf |
spellingShingle |
Lischka, Silke Stange, Paul Riebesell, Ulf Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
author_facet |
Lischka, Silke Stange, Paul Riebesell, Ulf |
author_sort |
Lischka, Silke |
title |
Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
title_short |
Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
title_full |
Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
title_fullStr |
Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
title_full_unstemmed |
Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria |
title_sort |
response of pelagic calcifiers (foraminifera, thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical north atlantic off gran canaria |
publisher |
Frontiers |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44422/ https://oceanrep.geomar.de/id/eprint/44422/1/fmars-05-00379.pdf https://doi.org/10.3389/fmars.2018.00379 |
genre |
North Atlantic Ocean acidification Planktonic foraminifera |
genre_facet |
North Atlantic Ocean acidification Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/44422/1/fmars-05-00379.pdf Lischka, S. , Stange, P. and Riebesell, U. (2018) Response of pelagic calcifiers (Foraminifera, Thecosomata) to ocean acidification during oligotrophic and simulated up-welling conditions in the subtropical North Atlantic off Gran Canaria. Open Access Frontiers in Marine Science, 5 . Art.Nr. 379. DOI 10.3389/fmars.2018.00379 <https://doi.org/10.3389/fmars.2018.00379>. doi:10.3389/fmars.2018.00379 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fmars.2018.00379 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766128007197491200 |