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Microscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonality

2022Journal article Restricted access
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dc.contributor.authorSilva, Cláudio Figueira
dc.contributor.authorPearson, Gareth
dc.contributor.authorSerrao, Ester
dc.contributor.authorBartsch, Inka
dc.contributor.authorMartins, Neusa
dc.date.accessioned2022-03-11T15:46:12Z
dc.date.available2022-03-11T15:46:12Z
dc.date.issued2022
dc.description.abstractKelp forests are important habitats in the strongly environmentally and seasonally variable Arctic. There is a critical lack of knowledge about how seasonal conditions and climate change scenarios influence survival and reproduction of kelp early life stages. To better understand the regulation of kelp life cycle processes in this harsh environment we focused on the physiological performance and reproductive success of early life stages in Alaria esculenta and Laminaria digitata from Kongsfjorden, Spitsbergen. Gametophyte growth and survival during Arctic winter and subsequent sporophyte recruitment under spring conditions were investigated. Winter conditions (2 degrees C, complete darkness) halted gametophyte growth and prevented the onset of gametogenesis in both species. The gametophytes of L. digitata but not A. esculenta became fertile after returning to spring conditions, suggesting that sporogenesis, sexual reproduction and recruitment in A. esculenta must occur successively during summer/autumn while in L. digitata a new generation of sporophytes could develop from over-wintering gametophytes. The effects of simulated canopy shading (offering protection against extreme irradiance stress, particularly as sea ice retreats), present-day and projected Arctic summer seawater temperatures, and nutrient levels on gametophyte survival, fertility and sporophyte recruitment success were also investigated in both species. A. esculenta gametophytes had greater survival and reproductive success than L. digitata, except under very low light (simulating dense canopy). In contrast, shading was required for reproductive success in L. digitata gametophytes. Predicted summer temperatures of 9 degrees C reduced sexual reproduction in both species. Interactions observed between these environmental drivers probably reflect species-specific seasonal patterns of survival and reproduction. These differences between kelp species in response to abiotic factors and light levels (simulated canopy shading) suggest that climate change could alter community structure in the Arctic through effects on sexual reproduction and sporophyte recruitment success. HIGHLIGHTS center dot Gametophytes were able to endure long periods of darkness.center dot Parental kelp canopy is key for gametophyte survival and recruitment.center dot Climate change may alter kelp recruitment patterns.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1080/09670262.2021.2014983pt_PT
dc.identifier.issn0967-0262
dc.identifier.urihttp://hdl.handle.net/10400.1/17676
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherTaylor & Francispt_PT
dc.relationEcology and genetics underlying local adaptation to global change across life stages of dominant kelp species
dc.relationNot Available
dc.relationAlgarve Centre for Marine Sciences
dc.subjectBrown algaept_PT
dc.subjectEcologypt_PT
dc.subjectIrradiancept_PT
dc.subjectLightpt_PT
dc.subjectMacroalgaept_PT
dc.subjectMarine ecologypt_PT
dc.subjectNutrientspt_PT
dc.subjectPolarpt_PT
dc.subjectResiliencept_PT
dc.subjectSeasonalitypt_PT
dc.titleMicroscopic life stages of Arctic kelp differ in their resilience and reproductive output in response to Arctic seasonalitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleEcology and genetics underlying local adaptation to global change across life stages of dominant kelp species
oaire.awardTitleNot Available
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F122567%2F2016/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL 57%2F2016%2FCP1361%2FCT0039/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.citation.endPage15pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleEuropean Journal of Phycologypt_PT
oaire.fundingStreamDL 57/2016
oaire.fundingStream6817 - DCRRNI ID
person.familyNameFigueira Silva
person.familyNamePearson
person.familyNameSerrao
person.givenNameCláudio
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.ciencia-id1D1A-4459-86D8
person.identifier.orcid0000-0001-8021-8023
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.orcid0000-0003-4333-2905
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.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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