Light availability and temperature, not increased CO2, will structure future meadows of Posidonia oceanica

Handle URI:
http://hdl.handle.net/10754/622922
Title:
Light availability and temperature, not increased CO2, will structure future meadows of Posidonia oceanica
Authors:
Hendriks, Iris E.; Olsen, Ylva S.; Duarte, Carlos M. ( 0000-0002-1213-1361 )
Abstract:
We evaluated the photosynthetic performance of Posidonia oceanica during short-term laboratory exposures to ambient and elevated temperatures (24–25°C and 29–30°C) warming and pCO2 (380, 750 and 1000ppm pCO2) under normal and low light conditions (200 and 40μmol photons m−2s−1 respectively). Plant growth was measured at the low light regime and showed a negative response to warming. Light was a critical factor for photosynthetic performance, although we found no evidence of compensation of photosynthetic quantum efficiency in high light. Relative Electron Rate Transport (rETRmax) was higher in plants incubated in high light, but not affected by pCO2 or temperature. The saturation irradiance (Ik) was negatively affected by temperature. We conclude that elevated CO2 does not enhance photosynthetic activity and growth, in the short term for P. oceanica, while temperature has a direct negative effect on growth. Low light availability also negatively affected photosynthetic performance during the short experimental period examined here. Therefore increasing concentrations of CO2 may not compensate for predicted future conditions of warmer water and higher turbidity for seagrass meadows.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Hendriks IE, Olsen YS, Duarte CM (2017) Light availability and temperature, not increased CO2, will structure future meadows of Posidonia oceanica. Aquatic Botany. Available: http://dx.doi.org/10.1016/j.aquabot.2017.02.004.
Publisher:
Elsevier BV
Journal:
Aquatic Botany
Issue Date:
15-Feb-2017
DOI:
10.1016/j.aquabot.2017.02.004
Type:
Article
ISSN:
0304-3770
Sponsors:
This research was supported by the MedSeA project (www.medsea-project.eu, contract number 265103 of the Framework Program 7 of the European Union), and ESTRESX (ref. CTM2012-32603), funded by the Spanish Ministry of Economy and Competitiveness. I.E.H. was supported by a JAE-DOC fellowship (CSIC, Spain). YSO was funded by a Marie Curie IEF from the European Union Seventh Framework Programme (FP7/2007–2013) under grant agreement no. 254297: FP7-PEOPLE-2009-IEF.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0304377017300487
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorHendriks, Iris E.en
dc.contributor.authorOlsen, Ylva S.en
dc.contributor.authorDuarte, Carlos M.en
dc.date.accessioned2017-02-26T06:34:20Z-
dc.date.available2017-02-26T06:34:20Z-
dc.date.issued2017-02-15en
dc.identifier.citationHendriks IE, Olsen YS, Duarte CM (2017) Light availability and temperature, not increased CO2, will structure future meadows of Posidonia oceanica. Aquatic Botany. Available: http://dx.doi.org/10.1016/j.aquabot.2017.02.004.en
dc.identifier.issn0304-3770en
dc.identifier.doi10.1016/j.aquabot.2017.02.004en
dc.identifier.urihttp://hdl.handle.net/10754/622922-
dc.description.abstractWe evaluated the photosynthetic performance of Posidonia oceanica during short-term laboratory exposures to ambient and elevated temperatures (24–25°C and 29–30°C) warming and pCO2 (380, 750 and 1000ppm pCO2) under normal and low light conditions (200 and 40μmol photons m−2s−1 respectively). Plant growth was measured at the low light regime and showed a negative response to warming. Light was a critical factor for photosynthetic performance, although we found no evidence of compensation of photosynthetic quantum efficiency in high light. Relative Electron Rate Transport (rETRmax) was higher in plants incubated in high light, but not affected by pCO2 or temperature. The saturation irradiance (Ik) was negatively affected by temperature. We conclude that elevated CO2 does not enhance photosynthetic activity and growth, in the short term for P. oceanica, while temperature has a direct negative effect on growth. Low light availability also negatively affected photosynthetic performance during the short experimental period examined here. Therefore increasing concentrations of CO2 may not compensate for predicted future conditions of warmer water and higher turbidity for seagrass meadows.en
dc.description.sponsorshipThis research was supported by the MedSeA project (www.medsea-project.eu, contract number 265103 of the Framework Program 7 of the European Union), and ESTRESX (ref. CTM2012-32603), funded by the Spanish Ministry of Economy and Competitiveness. I.E.H. was supported by a JAE-DOC fellowship (CSIC, Spain). YSO was funded by a Marie Curie IEF from the European Union Seventh Framework Programme (FP7/2007–2013) under grant agreement no. 254297: FP7-PEOPLE-2009-IEF.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0304377017300487en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Aquatic Botany. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Aquatic Botany, [, , (2017-02-15)] DOI: 10.1016/j.aquabot.2017.02.004 . © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectSeagrassen
dc.subjectGlobal warmingen
dc.subjectTemperatureen
dc.subjectOcean acidificationen
dc.subjectLight limitationen
dc.titleLight availability and temperature, not increased CO2, will structure future meadows of Posidonia oceanicaen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalAquatic Botanyen
dc.eprint.versionPost-printen
dc.contributor.institutionGlobal Change Department, IMEDEA (CSIC-UIB), Instituto Mediterráneo de Estudios Avanzados, C/Miquel Marqués 21, 07190 Esporles, Mallorca, Spainen
dc.contributor.institutionThe UWA Oceans Institute and School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley 6009, Australiaen
kaust.authorDuarte, Carlos M.en
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