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Heat stress responses and population genetics of the kelp Laminaria digitata (Phaeophyceae) across latitudes reveal differentiation among North Atlantic populations

2020Journal article Open access
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dc.contributor.authorLiesner, Daniel
dc.contributor.authorFouqueau, Louise
dc.contributor.authorValero, Myriam
dc.contributor.authorRoleda, Michael Y.
dc.contributor.authorPearson, Gareth
dc.contributor.authorBischof, Kai
dc.contributor.authorValentin, Klaus
dc.contributor.authorBartsch, Inka
dc.date.accessioned2020-09-22T12:58:34Z
dc.date.available2020-09-22T12:58:34Z
dc.date.issued2020
dc.description.abstractTo understand the thermal plasticity of a coastal foundation species across its latitudinal distribution, we assess physiological responses to high temperature stress in the kelp Laminaria digitata in combination with population genetic characteristics and relate heat resilience to genetic features and phylogeography. We hypothesize that populations from Arctic and cold-temperate locations are less heat resilient than populations from warm distributional edges. Using meristems of natural L. digitata populations from six locations ranging between Kongsfjorden, Spitsbergen (79°N), and Quiberon, France (47°N), we performed a common-garden heat stress experiment applying 15°C to 23°C over eight days. We assessed growth, photosynthetic quantum yield, carbon and nitrogen storage, and xanthophyll pigment contents as response traits. Population connectivity and genetic diversity were analyzed with microsatellite markers. Results from the heat stress experiment suggest that the upper temperature limit of L. digitata is nearly identical across its distribution range, but subtle differences in growth and stress responses were revealed for three populations from the species' ecological range margins. Two populations at the species' warm distribution limit showed higher temperature tolerance compared to other populations in growth at 19°C and recovery from 21°C (Quiberon, France), and photosynthetic quantum yield and xanthophyll pigment responses at 23°C (Helgoland, Germany). In L. digitata from the northernmost population (Spitsbergen, Norway), quantum yield indicated the highest heat sensitivity. Microsatellite genotyping revealed all sampled populations to be genetically distinct, with a strong hierarchical structure between southern and northern clades. Genetic diversity was lowest in the isolated population of the North Sea island of Helgoland and highest in Roscoff in the English Channel. All together, these results support the hypothesis of moderate local differentiation across L. digitata's European distribution, whereas effects are likely too weak to ameliorate the species' capacity to withstand ocean warming and marine heatwaves at the southern range edge.pt_PT
dc.description.sponsorshipFoundation for Science and Technology: UIDB/04326/2020/ PTDC/MAR-EST/6053/2014/ Biodiversa/0004/2015pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/ece3.6569pt_PT
dc.identifier.issn2045-7758
dc.identifier.urihttp://hdl.handle.net/10400.1/14736
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectGrowth ratept_PT
dc.subjectMicrosatellitept_PT
dc.subjectLocal adaptationpt_PT
dc.subjectMarine heatwavept_PT
dc.subjectPhysiologypt_PT
dc.subjectMarine forestpt_PT
dc.titleHeat stress responses and population genetics of the kelp Laminaria digitata (Phaeophyceae) across latitudes reveal differentiation among North Atlantic populationspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage9177pt_PT
oaire.citation.issue17pt_PT
oaire.citation.startPage9144pt_PT
oaire.citation.titleEcology and Evolutionpt_PT
oaire.citation.volume10pt_PT
person.familyNamePearson
person.givenNameGareth Anthony
person.identifier113536
person.identifier.ciencia-id3315-9919-1A52
person.identifier.orcid0000-0002-0768-464X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id55916875600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication.latestForDiscovery0a10c448-c7f5-4c3b-9488-3917c707e35e

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