H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification
Recent ocean acidification (OA) studies revealed that seawater [H+] rather than [CO2] or [HCO3-] regulate short-term responses in carbon fluxes of Emiliania huxleyi. Here, we investigated whether acclimation to altered carbonate chemistry modulates this regulation pattern and how the carbon supply f...
Published in: | Limnology and Oceanography |
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AMER SOC LIMNOLOGY OCEANOGRAPHY
2016
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Online Access: | https://epic.awi.de/id/eprint/41488/ https://epic.awi.de/id/eprint/41488/1/lno10352.pdf http://onlinelibrary.wiley.com/doi/10.1002/lno.10352/abstract https://hdl.handle.net/10013/epic.48971 https://hdl.handle.net/10013/epic.48971.d001 |
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ftawi:oai:epic.awi.de:41488 2023-05-15T17:50:43+02:00 H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification Kottmeier, Dorothee Rokitta, Sebastian Rost, Bjoern 2016-07-16 application/pdf https://epic.awi.de/id/eprint/41488/ https://epic.awi.de/id/eprint/41488/1/lno10352.pdf http://onlinelibrary.wiley.com/doi/10.1002/lno.10352/abstract https://hdl.handle.net/10013/epic.48971 https://hdl.handle.net/10013/epic.48971.d001 unknown AMER SOC LIMNOLOGY OCEANOGRAPHY https://epic.awi.de/id/eprint/41488/1/lno10352.pdf https://hdl.handle.net/10013/epic.48971.d001 Kottmeier, D. , Rokitta, S. orcid:0000-0002-7540-9033 and Rost, B. orcid:0000-0001-5452-5505 (2016) H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification , Limnology and Oceanography, 61 , pp. 2045-2057 . doi:10.1002/lno.10352 <https://doi.org/10.1002/lno.10352> , hdl:10013/epic.48971 EPIC3Limnology and Oceanography, AMER SOC LIMNOLOGY OCEANOGRAPHY, 61, pp. 2045-2057, ISSN: 0024-3590 Article isiRev 2016 ftawi https://doi.org/10.1002/lno.10352 2021-12-24T15:41:48Z Recent ocean acidification (OA) studies revealed that seawater [H+] rather than [CO2] or [HCO3-] regulate short-term responses in carbon fluxes of Emiliania huxleyi. Here, we investigated whether acclimation to altered carbonate chemistry modulates this regulation pattern and how the carbon supply for calcification is affected by carbonate chemistry. We acclimated E. huxleyi to present-day (ambient [CO2], [HCO3-], and pH) and OA conditions (high [CO2], ambient [HCO3-], low pH). To differentiate between the CO2 and pH/H+ effects, we also acclimated cells to carbonation (high [CO2] and [HCO3-], ambient pH) and acidification (ambient [CO2], low [HCO3-], and pH). Under these conditions, growth, production of particulate inorganic and organic carbon, as well as carbon and oxygen fluxes were measured. Under carbonation, photosynthesis and calcification were stimulated due to additional inline image uptake, whereas growth was unaffected. Such stimulatory effects are not apparent after short-term carbonation, indicating that cells adjusted their carbon acquisition during acclimation. Being driven by H+, these regulations can, however, not explain typical OA effects. Under acidification and OA, photosynthesis stayed constant, whereas calcification and growth decreased. Similar to the short-term responses toward high [H+], CO2 uptake significantly increased, but inline image uptake decreased. This antagonistic regulation in CO2 and inline image uptake can explain why photosynthesis, being able to use CO2 and inline image, often benefits from OA, whereas calcification, being mostly dependent on inline image, often decreases. We identified H+ as prime driver of coccolithophores' acclimation responses toward OA. Acidified conditions seem to put metabolic burdens on the cells that result in decreased growth. Article in Journal/Newspaper Ocean acidification Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Limnology and Oceanography 61 6 2045 2057 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Recent ocean acidification (OA) studies revealed that seawater [H+] rather than [CO2] or [HCO3-] regulate short-term responses in carbon fluxes of Emiliania huxleyi. Here, we investigated whether acclimation to altered carbonate chemistry modulates this regulation pattern and how the carbon supply for calcification is affected by carbonate chemistry. We acclimated E. huxleyi to present-day (ambient [CO2], [HCO3-], and pH) and OA conditions (high [CO2], ambient [HCO3-], low pH). To differentiate between the CO2 and pH/H+ effects, we also acclimated cells to carbonation (high [CO2] and [HCO3-], ambient pH) and acidification (ambient [CO2], low [HCO3-], and pH). Under these conditions, growth, production of particulate inorganic and organic carbon, as well as carbon and oxygen fluxes were measured. Under carbonation, photosynthesis and calcification were stimulated due to additional inline image uptake, whereas growth was unaffected. Such stimulatory effects are not apparent after short-term carbonation, indicating that cells adjusted their carbon acquisition during acclimation. Being driven by H+, these regulations can, however, not explain typical OA effects. Under acidification and OA, photosynthesis stayed constant, whereas calcification and growth decreased. Similar to the short-term responses toward high [H+], CO2 uptake significantly increased, but inline image uptake decreased. This antagonistic regulation in CO2 and inline image uptake can explain why photosynthesis, being able to use CO2 and inline image, often benefits from OA, whereas calcification, being mostly dependent on inline image, often decreases. We identified H+ as prime driver of coccolithophores' acclimation responses toward OA. Acidified conditions seem to put metabolic burdens on the cells that result in decreased growth. |
format |
Article in Journal/Newspaper |
author |
Kottmeier, Dorothee Rokitta, Sebastian Rost, Bjoern |
spellingShingle |
Kottmeier, Dorothee Rokitta, Sebastian Rost, Bjoern H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
author_facet |
Kottmeier, Dorothee Rokitta, Sebastian Rost, Bjoern |
author_sort |
Kottmeier, Dorothee |
title |
H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
title_short |
H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
title_full |
H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
title_fullStr |
H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
title_full_unstemmed |
H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification |
title_sort |
h+-driven increase in co2 uptake and decrease in hco3- uptake explain coccolithophores' acclimation responses to ocean acidification |
publisher |
AMER SOC LIMNOLOGY OCEANOGRAPHY |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41488/ https://epic.awi.de/id/eprint/41488/1/lno10352.pdf http://onlinelibrary.wiley.com/doi/10.1002/lno.10352/abstract https://hdl.handle.net/10013/epic.48971 https://hdl.handle.net/10013/epic.48971.d001 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
EPIC3Limnology and Oceanography, AMER SOC LIMNOLOGY OCEANOGRAPHY, 61, pp. 2045-2057, ISSN: 0024-3590 |
op_relation |
https://epic.awi.de/id/eprint/41488/1/lno10352.pdf https://hdl.handle.net/10013/epic.48971.d001 Kottmeier, D. , Rokitta, S. orcid:0000-0002-7540-9033 and Rost, B. orcid:0000-0001-5452-5505 (2016) H+-driven increase in CO2 uptake and decrease in HCO3- uptake explain coccolithophores' acclimation responses to ocean acidification , Limnology and Oceanography, 61 , pp. 2045-2057 . doi:10.1002/lno.10352 <https://doi.org/10.1002/lno.10352> , hdl:10013/epic.48971 |
op_doi |
https://doi.org/10.1002/lno.10352 |
container_title |
Limnology and Oceanography |
container_volume |
61 |
container_issue |
6 |
container_start_page |
2045 |
op_container_end_page |
2057 |
_version_ |
1766157585495359488 |