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Some don't like it hot: microhabitat-dependent thermal and water stresses in a trailing edge population

2015-05Journal article Open access
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dc.contributor.authorMota, Catarina F.
dc.contributor.authorEngelen, Aschwin H.
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorPearson, Gareth A.
dc.date.accessioned2018-12-07T14:53:49Z
dc.date.available2018-12-07T14:53:49Z
dc.date.issued2015-05
dc.description.abstractThe distributional limits of species in response to environmental change are usually studied at large temporal and/or geographical scales. However, organismal scale habitat variation can be overlooked when investigating large-scale averages of key factors such as temperature. We examine how microhabitat thermal conditions relate to physiological limits, which may contribute to recent range shifts in an intertidal alga. We defined the onset and maximum temperatures of the heat-shock response (HSR) for a southern edge population of Fucus vesiculosus, which has subsequently become extinct. The physiological threshold for resilience (assayed using chlorophyll fluorescence) coincided with declining HSR, determined from the temperature-dependent induction of seven heat-shock protein transcripts. In intertidal habitats, temperature affects physiology directly by controlling body temperature and indirectly through evaporative water loss. We investigated the relationship between the thermal environment and in situ molecular HSR at microhabitat scales. Over cm to m scales, four distinct microhabitats were defined in algal patches (canopy surface, patch edge, subcanopy, submerged channels), revealing distinct thermal and water stress environments during low-tide emersion. The in situ HSR agreed with estimated tissue temperatures in all but one microhabitat. Remarkably, in the most thermally extreme microhabitat (canopy surface), the HSR was essentially absent in desiccated tissue, providing a potential escape from the cellular metabolic costs of thermal stress. Meteorological records, microenvironmental thermal profiles and HSR data indicate that the maximum HSR is approached or exceeded in hydrated tissue during daytime low tides for much of the year. Furthermore, present-day summer seawater temperatures are sufficient to induce HSR during high-tide immersion, preventing recovery and resulting in continuous HSR during daytime low-tide cycles over the entire summer. HSR in the field matched microhabitat temperatures more closely than local seawater or atmospheric data, suggesting that the impacts of climatic change are best understood at the microhabitat scale, particularly in intertidal areas.
dc.description.sponsorshipFCT - Portuguese Science Foundation [POCTI/MAR/61105/2004, EXCL/AAG-GLO/0661/2012, SFRH/BPD/63/03/2009, SFRH/BD/74436/2010]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1111/1365-2435.12373
dc.identifier.issn0269-8463
dc.identifier.issn1365-2435
dc.identifier.urihttp://hdl.handle.net/10400.1/11699
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWiley-Blackwell
dc.relationExtant or extinct tipping points - climate changes drive genetic diversity and dynamics of range edge populations as evolutionary hotspots
dc.relationMOLECULAR MECHANISMS OF DESICCATION TOLERANCE IN FUCUS
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAcclimation-induced variation
dc.subjectHsp70 gene-expression
dc.subjectRocky intertidal zone
dc.subjectHeat-shock-protein
dc.subjectClimate-change
dc.subjectBrown-algae
dc.subjectPatterns
dc.subjectPhotosynthesis
dc.subjectBiogeography
dc.subjectResponses
dc.titleSome don't like it hot: microhabitat-dependent thermal and water stresses in a trailing edge population
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleExtant or extinct tipping points - climate changes drive genetic diversity and dynamics of range edge populations as evolutionary hotspots
oaire.awardTitleMOLECULAR MECHANISMS OF DESICCATION TOLERANCE IN FUCUS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/EXCL%2FAAG-GLO%2F0661%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F74436%2F2010/PT
oaire.citation.endPage649
oaire.citation.issue5
oaire.citation.startPage640
oaire.citation.titleFunctional Ecology
oaire.citation.volume29
oaire.fundingStream3599-PPCDT
person.familyNameMota
person.familyNameEngelen
person.familyNameSerrao
person.familyNamePearson
person.givenNameCatarina
person.givenNameAschwin
person.givenNameEster A.
person.givenNameGareth Anthony
person.identifierC-6686-2012
person.identifier113536
person.identifier.ciencia-id911A-9A0C-744D
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.ciencia-id3315-9919-1A52
person.identifier.orcid0000-0002-5440-9157
person.identifier.orcid0000-0002-9579-9606
person.identifier.orcid0000-0003-1316-658X
person.identifier.orcid0000-0002-0768-464X
person.identifier.ridM-4281-2013
person.identifier.ridM-3432-2013
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id26432721100
person.identifier.scopus-author-id6701622770
person.identifier.scopus-author-id7004093604
person.identifier.scopus-author-id55916875600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
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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