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Response of kelps from different latitudes to consecutive heat shock

2015-02Journal article Open Access
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dc.contributor.authorPereira, Tania R.
dc.contributor.authorEngelen, Aschwin H.
dc.contributor.authorPearson, Gareth
dc.contributor.authorValero, Myriam
dc.contributor.authorSerrao, Ester A.
dc.date.accessioned2018-12-07T14:52:57Z
dc.date.available2018-12-07T14:52:57Z
dc.date.issued2015-02
dc.description.abstractAlthough extensive work has focused on kelp responses to constant temperature, little is known about their response to the consecutive temperature shocks they are often exposed to in the shallow subtidal and intertidal pools. Here we characterized the responses of the two southernmost forest-forming kelp species in the Northeast Atlantic, Laminaria ochroleuca De La Pylaie and Saccorhiza polyschides (Lightf.) Batt. to multiple cycles of thermal stress. Individuals from the upper vertical limit of the geographical distribution edges where the two species co-occur forming forests, France and Portugal, were exposed to 4 consecutive cycles of thermal shock simulating a spring tide. A 24 h cycle consisted of culture at 15 degrees C, plus 1 h heat shock at one of five levels (20, 22.5, 25, 27.5 or 30 degrees C). The maximum quantum yield (Fv/Fm) of chlorophyll fluorescence of photosystem 2 (PS2) was used to detect impaired reaction center function, as a proxy for individual fitness costs, during recovery from heat shock. Both species showed resilience to temperatures from 20 to 25 degrees C. While exposure to 27.5 degrees C caused no inhibition to Fv/Fm of S. polyschides, a threshold was met above this temperature and exposure to 30 degrees C caused the death of all individuals. In contrast, L ochroleuca from France was damaged but able to survive 30 degrees C shocks and individuals from Portugal showed complete resilience to this treatment. In both species, blade elongation decreased with increasing temperature, with necrosis surpassing growth at higher temperatures. Resilience to high temperature exposure may confer an advantage to L ochroleuca to colonize intertidal pools on the Portuguese coast, in agreement with the observation that both species recruit in tide pools but only L ochroleuca reach adulthood. Our results indicate that as summer temperatures increase with climate change, the disappearance of S. polyschides from intertidal pools and a decrease in the density of L ochroleuca can be expected. (C) 2014 Elsevier B.V. All rights reserved.
dc.description.sponsorshipASSEMBLE (ASSociation of European Marine Biological Laboratories) [227799]; Portuguese Science and Technology Foundation (FCT); FCT [PTDC/AAC-CLI/109108/2008, EXCL/AAG-GLO/0661/2012]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.jembe.2014.10.022
dc.identifier.issn0022-0981
dc.identifier.issn1879-1697
dc.identifier.urihttp://hdl.handle.net/10400.1/11281
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science Bv
dc.relationAssociation of European Marine Biological Laboratories
dc.relationExtant or extinct tipping points - climate changes drive genetic diversity and dynamics of range edge populations as evolutionary hotspots
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectClimate-change
dc.subjectLaminaria-Ochroleuca
dc.subjectYoung Sporophytes
dc.subjectSaccorhiza-Polyschides
dc.subjectTemperature tolerance
dc.subjectLife-histories
dc.subjectBrown seaweeds
dc.subjectNorth-sea
dc.subjectPhaeophyta
dc.subjectGradient
dc.titleResponse of kelps from different latitudes to consecutive heat shock
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAssociation of European Marine Biological Laboratories
oaire.awardTitleExtant or extinct tipping points - climate changes drive genetic diversity and dynamics of range edge populations as evolutionary hotspots
oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/227799/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FAAC-CLI%2F109108%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/EXCL%2FAAG-GLO%2F0661%2F2012/PT
oaire.citation.endPage62
oaire.citation.startPage57
oaire.citation.titleJournal of Experimental Marine Biology and Ecology
oaire.citation.volume463
oaire.fundingStreamFP7
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
person.familyNameEngelen
person.familyNamePearson
person.familyNameSerrao
person.givenNameAschwin
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id911A-9A0C-744D
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0002-9579-9606
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridM-3432-2013
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id6701622770
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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