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dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCOQUILLÉ, Nathalie
hal.structure.identifierEcosystèmes aquatiques et changements globaux [UR EABX]
dc.contributor.authorMORIN, Soizic
dc.date.accessioned2024-01-30T08:55:46Z
dc.date.available2024-01-30T08:55:46Z
dc.date.issued2019
dc.identifier.issn1470-160Xen_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/187622
dc.description.abstractEnDiatom teratologies have intrigued scientists since the XIXth century, with respect to their causes and origins. These deformities, mainly observed in long-term cultures or under high levels of pollution, were poorly considered, until they were recently found to be potential indicators of toxic impairment of freshwaters. However, very little is known about their ecology. In this study, the growth and fitness of morphologically distinct descendants of the same cell line of Gomphonema gracile (teratological vs. non teratological forms) were compared over a typical growth cycle. Contrary to expectations, teratological populations grew slightly faster, at a rate of 0.47 ± 0.03 divisions.day-1, versus 0.41 ± 0.04 for the normal morphotype. They had similar physiological performances as non-teratological forms. They did not differ in their movement velocities, but the trajectory of teratological forms was more linear, likely as a consequence of their elongated outline. Under the same culture conditions, no competitive exclusion of one phenotype over the other was demonstrated on the time scale of an exponential growth cycle (9 days). Moreover, the deformities were faithfully reproduced over time, and no evidence of decreased viability in teratological forms was provided. These new insights call into question the common hypothesis that deformed diatoms are altered individuals produced by unfavorable conditions and thus highlight ecosystem dysfunction. They call for further investigations of their ecology.
dc.language.isoENen_US
dc.subjectDIATOME
dc.subjectMORPHOLOGIE
dc.subject.endiatom
dc.subject.enmorphology
dc.titlePerformances des morphotypes tératologiques et héritabilité des déformations chez Gomphonema gracile
dc.title.enFitness of teratological morphotypes and heritability of deformities in the diatom Gomphonema gracile
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.ecolind.2019.105442en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalEcological Indicatorsen_US
bordeaux.page105442en_US
bordeaux.volume106en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamLPTCen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02264008
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.title=Performances%20des%20morphotypes%20t%C3%A9ratologiques%20et%20h%C3%A9ritabilit%C3%A9%20des%20d%C3%A9formations%20chez%20Gomphonema%20gracile&rft.atitle=Performances%20des%20morphotypes%20t%C3%A9ratologiques%20et%20h%C3%A9ritabilit%C3%A9%20des%20d%C3%A9formations%20chez%20Gomphonema%20gracile&rft.jtitle=Ecological%20Indicators&rft.date=2019&rft.volume=106&rft.spage=105442&rft.epage=105442&rft.eissn=1470-160X&rft.issn=1470-160X&rft.au=COQUILLE%CC%81,%20Nathalie&MORIN,%20Soizic&rft.genre=article


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