The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea

Ocean acidification is a result of the uptake of anthropogenic CO₂ from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will have an overwhelming effect on surface oce...

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Autores: Meier, K. J. S., Beaufort, L., Heussner, S., Ziveri, Patrizia|||0000-0002-5576-0301
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:130489
Acceso en línea:https://ddd.uab.cat/record/130489
https://dx.doi.org/urn:doi:10.5194/bg-11-2857-2014
Access Level:acceso abierto
Palabra clave:Ocean acidification
Global climate change
Mediterranean sea
Coccolithophores
Emiliania huxley
E. huxley
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spelling The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean SeaMeier, K. J. S.Beaufort, L.Heussner, S.Ziveri, Patrizia|||0000-0002-5576-0301Ocean acidificationGlobal climate changeMediterranean seaCoccolithophoresEmiliania huxleyE. huxleyOcean acidification is a result of the uptake of anthropogenic CO₂ from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will have an overwhelming effect on surface ocean carbon reservoirs. The recorded and anticipated changes in seawater carbonate chemistry will presumably affect global oceanic carbonate production. Coccolithophores as the primary calcifying phytoplankton group, and especially Emiliania huxleyi as the most abundant species have shown a reduction of calcification at increased CO₂ concentrations for the majority of strains tested in culture experiments. A reduction of calcification is associated with a decrease in coccolith weight. However, the effect in monoclonal cultures is relatively small compared to the strong variability displayed in natural E. huxleyi communities, as these are a mix of genetically and sometimes morphologically distinct types. Average coccolith weight is likely influenced by the variability in seawater carbonate chemistry in different parts of the world's oceans and on glacial/interglacial time scales due to both physiological effects and morphotype selectivity. An effect of the ongoing ocean acidification on E. huxleyi calcification has so far not been documented in situ. Here, we analyze E. huxleyi coccolith weight from the NW Mediterranean Sea in a 12-year sediment trap series, and surface sediment and sediment core samples using an automated recognition and analyzing software. Our findings clearly show (1) a continuous decrease in the average coccolith weight of E. huxleyi from 1993 to 2005, reaching levels below pre-industrial (Holocene) and industrial (20th century) values recorded in the sedimentary record and (2) seasonal variability in coccolith weight that is linked to the coccolithophore productivity. The observed long-term decrease in coccolith weight is most likely a result of the changes in the surface ocean carbonate system. Our results provide the first indications of an in situ impact of ocean acidification on coccolithophore weight in a natural E. huxleyi population, even in the highly alkaline Mediterranean Sea. 22014-01-0120142014-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/130489https://dx.doi.org/urn:doi:10.5194/bg-11-2857-2014reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/3.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1304892026-06-06T12:50:31Z
dc.title.none.fl_str_mv The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
title The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
spellingShingle The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
Meier, K. J. S.
Ocean acidification
Global climate change
Mediterranean sea
Coccolithophores
Emiliania huxley
E. huxley
title_short The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
title_full The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
title_fullStr The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
title_full_unstemmed The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
title_sort The Role of ocean acidification in Emiliania huxleyi coccolith thinning in the Mediterranean Sea
dc.creator.none.fl_str_mv Meier, K. J. S.
Beaufort, L.
Heussner, S.
Ziveri, Patrizia|||0000-0002-5576-0301
author Meier, K. J. S.
author_facet Meier, K. J. S.
Beaufort, L.
Heussner, S.
Ziveri, Patrizia|||0000-0002-5576-0301
author_role author
author2 Beaufort, L.
Heussner, S.
Ziveri, Patrizia|||0000-0002-5576-0301
author2_role author
author
author
dc.subject.none.fl_str_mv Ocean acidification
Global climate change
Mediterranean sea
Coccolithophores
Emiliania huxley
E. huxley
topic Ocean acidification
Global climate change
Mediterranean sea
Coccolithophores
Emiliania huxley
E. huxley
description Ocean acidification is a result of the uptake of anthropogenic CO₂ from the atmosphere into the ocean and has been identified as a major environmental and economic threat. The release of several thousands of petagrams of carbon over a few hundred years will have an overwhelming effect on surface ocean carbon reservoirs. The recorded and anticipated changes in seawater carbonate chemistry will presumably affect global oceanic carbonate production. Coccolithophores as the primary calcifying phytoplankton group, and especially Emiliania huxleyi as the most abundant species have shown a reduction of calcification at increased CO₂ concentrations for the majority of strains tested in culture experiments. A reduction of calcification is associated with a decrease in coccolith weight. However, the effect in monoclonal cultures is relatively small compared to the strong variability displayed in natural E. huxleyi communities, as these are a mix of genetically and sometimes morphologically distinct types. Average coccolith weight is likely influenced by the variability in seawater carbonate chemistry in different parts of the world's oceans and on glacial/interglacial time scales due to both physiological effects and morphotype selectivity. An effect of the ongoing ocean acidification on E. huxleyi calcification has so far not been documented in situ. Here, we analyze E. huxleyi coccolith weight from the NW Mediterranean Sea in a 12-year sediment trap series, and surface sediment and sediment core samples using an automated recognition and analyzing software. Our findings clearly show (1) a continuous decrease in the average coccolith weight of E. huxleyi from 1993 to 2005, reaching levels below pre-industrial (Holocene) and industrial (20th century) values recorded in the sedimentary record and (2) seasonal variability in coccolith weight that is linked to the coccolithophore productivity. The observed long-term decrease in coccolith weight is most likely a result of the changes in the surface ocean carbonate system. Our results provide the first indications of an in situ impact of ocean acidification on coccolithophore weight in a natural E. huxleyi population, even in the highly alkaline Mediterranean Sea.
publishDate 2014
dc.date.none.fl_str_mv 2
2014-01-01
2014
2014-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/130489
https://dx.doi.org/urn:doi:10.5194/bg-11-2857-2014
url https://ddd.uab.cat/record/130489
https://dx.doi.org/urn:doi:10.5194/bg-11-2857-2014
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/3.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/3.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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