Acidification counteracts negative effects of warming on diatom silicification

Handle URI:
http://hdl.handle.net/10754/623320
Title:
Acidification counteracts negative effects of warming on diatom silicification
Authors:
Coello-Camba, Alexandra; Agusti, Susana ( 0000-0003-0536-7293 )
Abstract:
Diatoms are a significant group contributing up to 40 % of annual primary production in the oceans. They have a special siliceous cell wall that, acting as a ballast, plays a key role in the sequestration of global carbon and silica. Diatoms dominate primary production in the Arctic Ocean, where global climate change is causing increases in water temperature and in the partial pressure of CO2 (pCO2). Here we show that as water temperature increases diatoms become stressed, grow to smaller sizes, and decrease their silicification rates. But at higher pCO2, as the pH of seawater decreases, silica incorporation rates are increased. In a future warmer Arctic ocean diatoms may have a competitive advantage under increased ocean acidification, as increased pCO2 counteracts the adverse effects of increasing temperature on silicification and buffers its consequences in the biogeochemical cycles of carbon and silica.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Coello-Camba A, Agustí S (2016) Acidification counteracts negative effects of warming on diatom silicification. Biogeosciences Discussions: 1–19. Available: http://dx.doi.org/10.5194/bg-2016-424.
Publisher:
Copernicus GmbH
Journal:
Biogeosciences Discussions
Issue Date:
24-Oct-2016
DOI:
10.5194/bg-2016-424
Type:
Article
ISSN:
1810-6285
Sponsors:
This research was supported by the project Arctic Tipping Points (ATP, contract # 226248) from the European Union. A. Coello-Camba was supported by a grant BES-2007-15193 from the Spanish Ministry of Science and Innovation. We thank project coordinators C.M. Duarte and P. Wassmann, the crew of R/V Jan Mayen and Viking Explorer for assistance with sampling, and The University Centre in Svalbard (UNIS) for their hospitality.
Additional Links:
http://www.biogeosciences-discuss.net/bg-2016-424/
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorCoello-Camba, Alexandraen
dc.contributor.authorAgusti, Susanaen
dc.date.accessioned2017-05-04T06:39:20Z-
dc.date.available2017-05-04T06:39:20Z-
dc.date.issued2016-10-24en
dc.identifier.citationCoello-Camba A, Agustí S (2016) Acidification counteracts negative effects of warming on diatom silicification. Biogeosciences Discussions: 1–19. Available: http://dx.doi.org/10.5194/bg-2016-424.en
dc.identifier.issn1810-6285en
dc.identifier.doi10.5194/bg-2016-424en
dc.identifier.urihttp://hdl.handle.net/10754/623320-
dc.description.abstractDiatoms are a significant group contributing up to 40 % of annual primary production in the oceans. They have a special siliceous cell wall that, acting as a ballast, plays a key role in the sequestration of global carbon and silica. Diatoms dominate primary production in the Arctic Ocean, where global climate change is causing increases in water temperature and in the partial pressure of CO2 (pCO2). Here we show that as water temperature increases diatoms become stressed, grow to smaller sizes, and decrease their silicification rates. But at higher pCO2, as the pH of seawater decreases, silica incorporation rates are increased. In a future warmer Arctic ocean diatoms may have a competitive advantage under increased ocean acidification, as increased pCO2 counteracts the adverse effects of increasing temperature on silicification and buffers its consequences in the biogeochemical cycles of carbon and silica.en
dc.description.sponsorshipThis research was supported by the project Arctic Tipping Points (ATP, contract # 226248) from the European Union. A. Coello-Camba was supported by a grant BES-2007-15193 from the Spanish Ministry of Science and Innovation. We thank project coordinators C.M. Duarte and P. Wassmann, the crew of R/V Jan Mayen and Viking Explorer for assistance with sampling, and The University Centre in Svalbard (UNIS) for their hospitality.en
dc.publisherCopernicus GmbHen
dc.relation.urlhttp://www.biogeosciences-discuss.net/bg-2016-424/en
dc.rightsThis work is distributed under the Creative Commons Attribution 3.0 License.en
dc.subjectDiatomsen
dc.subjectSilicaen
dc.subjectInteractionen
dc.subjectTemperatureen
dc.subjectpCO2en
dc.titleAcidification counteracts negative effects of warming on diatom silicificationen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalBiogeosciences Discussionsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Arctic and Marine Biology, Faculty of Bioscience, Fishery and Economy, University of Tromsø, Tromsø, 9037 , Norwayen
kaust.authorCoello-Camba, Alexandraen
kaust.authorAgusti, Susanaen
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