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Authordc.contributor.authorBecheler, Ronan
Authordc.contributor.authorHaverbeck, Daniela
Authordc.contributor.authorClerc, Corentin
Authordc.contributor.authorMontecinos, Gabriel
Authordc.contributor.authorValero, Myriam
Authordc.contributor.authorMansilla, Andrés
Authordc.contributor.authorFaugeron, Sylvain Wielfrid
Admission datedc.date.accessioned2024-05-22T16:30:59Z
Available datedc.date.available2024-05-22T16:30:59Z
Publication datedc.date.issued2022
Cita de ítemdc.identifier.citationFrontiers in Marine Science July 2022 Volume 9 Article 802535es_ES
Identifierdc.identifier.other10.3389/fmars.2022.802535
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/198688
Abstractdc.description.abstractThe giant kelp Macrocystis pyrifera is a cosmopolitan species of cold-temperate coasts. Its South-American distribution ranges from Peru to Cape Horn and Argentina, encompassing a considerable temperature gradient, from 3 to 20°C. Temperature is known to strongly affect survival, growth and reproduction of many kelp species, and ongoing global warming is already eroding their range distribution. Their response to thermal variability was shown to vary among genetically differentiated regions and populations, suggesting a possible adaptive divergence in thermal tolerance traits. This study aimed at testing the existence of local adaptation in the giant kelp, in regions separated by up to 4000km and strong thermal divergence. Two complementary experiments mimicked reciprocal transplants through a common garden approach, each habitat being represented by a given temperature corresponding to the regional average of the sampled populations. Several proxies of fitness were measured in the haploid stage of the kelp, and sympatric versus allopatric conditions (i.e. individuals at the temperature of their region of origin versus in a different temperature and versus individuals from other regions in that temperature) were compared. Additionally, a heat wave at 24°C was applied to measure the tolerance limits of these gametophytes. A significant interaction between experimental temperature and region of origin revealed that temperature tolerance varied among regions. However, depending on the fitness parameter measured, high latitude populations from the sub- Antarctic region were not always less heat resilient than populations from the warmer region of Peru. Even at 24°C, a temperature that is exceptionally reached in the southernmost part of the kelp’s natural habitat, all the gametophytes survived, although with strong differences in other traits among regions and populations within regions. This large range of temperature tolerance supports the idea of kelp gametophytes being a resistant stage. Finally, local adaptation sensu stricto was not detected. Fertility was more influenced by the geographic origin than by temperature, with possible effects of marginal conditions at the extremes of the distribution range. The latter results also suggest that stochastic dynamics such as genetic drift restricts adaptive processes in some populations of M. pyrifera.es_ES
Patrocinadordc.description.sponsorshipANID/CONICYT Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 1160930 3170597 FB-0001 CeBiB ANID MIllenium Science Initiative Program NCN2021_033 CNRS International Research Network: Diversity and Biotechnology of Marine Algae IDEALG project ANR-10-BTBR-04es_ES
Lenguagedc.language.isoenes_ES
Publisherdc.publisherFrontiers Mediaes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 United States*
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/us/*
Sourcedc.sourceFrontiers in Marine Sciencees_ES
Keywordsdc.subjectPhenotypic plasticityes_ES
Keywordsdc.subjectLatitudinal gradientes_ES
Keywordsdc.subjectCommon garden experimentes_ES
Keywordsdc.subjectHeat tolerancees_ES
Keywordsdc.subjectLocal adaptationes_ES
Títulodc.titleVariation in thermal tolerance of the giant kelp's gametophytes: suitability of habitat, population quality or local adaptation?es_ES
Document typedc.typeArtículo de revistaes_ES
dc.description.versiondc.description.versionVersión publicada - versión final del editores_ES
dcterms.accessRightsdcterms.accessRightsAcceso abiertoes_ES
Catalogueruchile.catalogadorcfres_ES
Indexationuchile.indexArtículo de publícación WoSes_ES


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Attribution-NonCommercial-NoDerivs 3.0 United States
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 United States