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Interactions of daylength, temperature and nutrients affect thresholds for life stage transitions in the kelp Laminaria digitata (Phaeophyceae)

2017-04Journal article Open access
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dc.contributor.authorMartins, Neusa
dc.contributor.authorTanttu, Heidi
dc.contributor.authorPearson, Gareth
dc.contributor.authorSerrao, Ester A.
dc.contributor.authorBartsch, Inka
dc.date.accessioned2018-12-07T14:52:27Z
dc.date.available2018-12-07T14:52:27Z
dc.date.issued2017-04
dc.description.abstractKelp beds worldwide are under pressure from ongoing climate and environmental change. Along European coastlines increases in seawater temperature and changes in nutrient conditions occur where upwelling events are disrupted and also along eutrophicated coasts. In addition, seaweed responses to change may interact with seasonal daylength cycles. We performed a factorial experiment to examine the combined effects of seawater temperatures, nutrient regimes and photoperiod (long and short days) in order to better understand how latitudinal or seasonal differences in daylengths affect the sensitivity of transient microscopic kelp stages of Laminaria digitata from the North Sea to warming and eutrophication. While the optimal temperature range for vegetative gametophyte growth was 10 degrees C-18 degrees C under long summer photoperiod conditions, gametogenesis was induced at lower temperatures between 5 degrees C and 15 degrees C, with maximum sporophyte development under long photoperiods and enriched nutrient regimes, which represent local late spring conditions. Although gametogenesis was fastest at 10 degrees C-15 degrees C, sporophyte recruitment was highest at 5 degrees C. As these particular early life cycle processes in L. digitata have different temperature optima, this may drive the seasonal cycle of recruitment in the field. Increasing summer temperatures due to global warming will increase gametophyte size due to enhanced vegetative growth and inhibition of gametogenesis. This will probably lead to delayed but enhanced recruitment of new sporophytes under cooler autumn to spring conditions over a wide geographical scale, preventing the formation of juvenile sporophytes under stressful summer conditions and possibly changing annual recruitment patterns.
dc.description.sponsorshipSTSM Grant from the COST Action "Phycomorph" [FA1406]; Portuguese Science Foundation (FCT) programs [EXCL/AAG-GLO/0661/2012, UID/Multi/04326/2013]; BiodiVERsA [Biodiversa/0004/2015, PTDC/MAR-EST/6053/2014]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1515/bot-2016-0094
dc.identifier.issn0006-8055
dc.identifier.issn1437-4323
dc.identifier.urihttp://hdl.handle.net/10400.1/11086
dc.language.isoeng
dc.peerreviewedyes
dc.publisherWalter de Gruyter Gmbh
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.subjectLarge brown seaweeds
dc.subjectUndaria-Pinnatifida
dc.subjectMicroscopic stages
dc.subjectGametophyte reproduction
dc.subjectEnvironmental-conditions
dc.subjectMacrocystis-Pyrifera
dc.subjectSexual reproduction
dc.subjectCulture-media
dc.subjectUv-radiation
dc.subjectWest-coast
dc.titleInteractions of daylength, temperature and nutrients affect thresholds for life stage transitions in the kelp Laminaria digitata (Phaeophyceae)
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.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/EXCL%2FAAG-GLO%2F0661%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.citation.endPage121
oaire.citation.issue2
oaire.citation.startPage109
oaire.citation.titleBotanica Marina
oaire.citation.volume60
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876
person.familyNamePearson
person.familyNameSerrao
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id1D1A-4459-86D8
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-4333-2905
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
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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