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Lack of evolutionary adjustment to ambient temperature in highly specialized cave beetles

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dc.contributor.author Rizzo, Valeria
dc.contributor.author Sánchez Fernández, David
dc.contributor.author Fresneda, Javier
dc.contributor.author Cieslak, Alexandra
dc.contributor.author Ribera, Ignacio
dc.date.accessioned 2015-03-26T08:23:07Z
dc.date.available 2015-03-26T08:23:07Z
dc.date.issued 2015
dc.identifier.citation Rizzo V, Sánchez-Fernández D, Fresneda J, Cieslak A, Ribera I. Lack of evolutionary adjustment to ambient temperature in highly specialized cave beetles. BMC Evolutionary Biology. 2015; 15: 10. DOI 10.1186/s12862-015-0288-2
dc.identifier.issn 1471-2148
dc.identifier.uri http://hdl.handle.net/10230/23280
dc.description.abstract Background: A key question in evolutionary biology is the relationship between species traits and their habitats. Caves offer an ideal model to test the adjustment of species to their surrounding temperature, as they provide homogeneous and simple environments. We compared two species living under different thermal conditions within a lineage of Pyrenean beetles highly modified for the subterranean life since the Miocene. One, Troglocharinus fonti, is found in caves at 4-11°C in the ancestral Pyrenean range. The second, T. ferreri, inhabits the coastal area of Catalonia since the early Pliocene, and lives at 14-16°C. Results: We found no differences in their short term upper thermal limit (ca. 50°C), similar to that of most organisms, or their lower thermal limit (ca. -2.5°C), higher than for most temperate insects and suggesting the absence of cryoprotectants. In longer term tests (7 days) survival between 6-20°C was almost 100% for both species plus two outgroups of the same lineage, but all four died between 23-25°C, without significant differences between them. Conclusions: Our results suggest that species in this lineage have lost some of the thermoregulatory mechanisms common in temperate insects, as their inferred default tolerance range is larger than the thermal variation experienced through their whole evolutionary history.
dc.description.sponsorship This work was partly funded by project CGL2010-15755 from the Spanish Government to IR
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher BioMed Central
dc.relation.ispartof BMC Evolutionary Biology. 2015; 15: 10
dc.rights © 2015 Rizzo et al.; licensee BioMed Central. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
dc.rights.uri http://creativecommons.org/licenses/by/4.0
dc.subject.other Evolució (Biologia)
dc.subject.other Ésser humà -- Influència del clima
dc.title Lack of evolutionary adjustment to ambient temperature in highly specialized cave beetles
dc.type info:eu-repo/semantics/article
dc.identifier.doi http://dx.doi.org/10.1186/s12862-015-0288-2
dc.subject.keyword Acclimation
dc.subject.keyword Adaptation
dc.subject.keyword Pyrenees
dc.subject.keyword Thermal tolerance
dc.subject.keyword Subterranean environment
dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/CGL2010-15755
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.type.version info:eu-repo/semantics/publishedVersion

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