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Temperature niche shift observed in a Lepidoptera population under allochronic divergence

hal.structure.identifierUniversidade Técnica de Lisboa [UTL]
hal.structure.identifierCentro de Estudos Florestais
dc.contributor.authorSANTOS, Helena
hal.structure.identifierUniversidade Técnica de Lisboa [UTL]
dc.contributor.authorPAIVA, M.R.
hal.structure.identifierUniversidade Técnica de Lisboa [UTL]
dc.contributor.authorTAVARES, C.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorKERDELHUE, Carole
hal.structure.identifierUniversidade Técnica de Lisboa [UTL]
hal.structure.identifierCentro de Estudos Florestais
dc.contributor.authorBRANCO, Manuela
dc.date.issued2011
dc.identifier.issn1010-061X
dc.description.abstractEnA process of adaptive divergence for tolerance to high temperatures was identified using a rare model system, consisting of two sympatric populations of a Lepidoptera (Thaumetopoea pityocampa) with different life cycle timings, a ‘mutant’ population with summer larval development, Leiria SP, and the founder natural population, having winter larval development, Leiria WP. A third, allopatric population (Bordeaux WP) was also studied. First and second instar larvae were experimentally exposed to daily-cycles of heat treatment reaching maximum values of 36, 38, 40 and 42 °C; control groups placed at 25 °C. A lethal temperature effect was only significant at 42 °C, for Leiria SP, whereas all temperatures tested had a significant negative effect upon Leiria WP, thus indicating an upper threshold of survival c.a. 6 °C above that of the WP. Cox regression model, for pooled heat treatments, predicted mortality hazard to increase for Leiria WP (+108%) and Bordeaux WP (+78%) in contrast to Leiria SP; to increase by 24% for each additional °C; and to decrease by 53% from first to second instar larvae. High variability among individuals was observed, a population characteristic that may favour selection and consequent adaptation. Present findings provide an example of ecological differentiation, following a process of allochronic divergence. Results further contribute to a better understanding of the implications of climate change for ecological genetics.
dc.language.isoen
dc.publisherWiley
dc.subjectINSECTE
dc.subjectLÉPIDOPTÈRE
dc.subject.enTHAUMETOPOEA PITYOCAMPA LEPIDOPTERA
dc.subject.enADAPTATION
dc.subject.enCLIMATE
dc.subject.enINSECTS
dc.subject.enNICHE SHIFT
dc.subject.enSYMPATRIC SPECIATION
dc.subject.enPIN MARITIME
dc.title.enTemperature niche shift observed in a Lepidoptera population under allochronic divergence
dc.typeArticle de revue
dc.identifier.doi10.1111/j.1420-9101.2011.02318.x
dc.subject.halSciences du Vivant [q-bio]/Biodiversité/Evolution [q-bio.PE]
bordeaux.journalJournal of Evolutionary Biology
bordeaux.page1897-1905
bordeaux.volume24
bordeaux.issue9
bordeaux.peerReviewedoui
hal.identifierhal-02650143
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02650143v1
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