Individual diet specialisation in sparrows is driven by phenotypic plasticity in traits related to trade-offs in animal performance

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dc.contributor.authorMaldonado, Karin
dc.contributor.authorNewsome, Seth D.
dc.contributor.authorRazeto-Barry, Pablo
dc.contributor.authorManuel Rios, Juan
dc.contributor.authorPiriz, Gabriela
dc.contributor.authorSabat, Pablo
dc.date.accessioned2025-01-23T21:19:45Z
dc.date.available2025-01-23T21:19:45Z
dc.date.issued2019
dc.description.abstractIndividual diet specialisation (IS) is frequent in many animal taxa and affects population and community dynamics. The niche variation hypothesis (NVH) predicts that broader population niches should exhibit greater IS than populations with narrower niches, and most studies that examine the ecological factors driving IS focus on intraspecific competition. We show that phenotypic plasticity of traits associated with functional trade-offs is an important, but unrecognised mechanism that promotes and maintains IS. We measured nitrogen isotope (delta N-15) and digestive enzyme plasticity in four populations of sparrows (Zonotrichia capensis) to explore the relationship between IS and digestive plasticity. Our results show that phenotypic plasticity associated with functional trade-offs is related in a nonlinear fashion with the degree of IS and positively with population niche width. These findings are opposite to the NVH and suggest that among individual differences in diet can be maintained via acclimatisation and not necessarily require a genetic component.
dc.fuente.origenWOS
dc.identifier.doi10.1111/ele.13174
dc.identifier.eissn1461-0248
dc.identifier.issn1461-023X
dc.identifier.urihttps://doi.org/10.1111/ele.13174
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101191
dc.identifier.wosidWOS:000453562900012
dc.issue.numero1
dc.language.isoen
dc.pagina.final137
dc.pagina.inicio128
dc.revistaEcology letters
dc.rightsacceso restringido
dc.subjectAssimilation efficiency
dc.subjectdiet variation
dc.subjectdigestive efficiency
dc.subjectdigestive enzymes
dc.subjectindividual diet specialisation
dc.subjectniche breadth
dc.subjectniche variation hypothesis
dc.subjectniche width
dc.subjectphenotypic plasticity
dc.subjectstable isotopes
dc.subjecttrade-offs
dc.subjecttrophic niche
dc.titleIndividual diet specialisation in sparrows is driven by phenotypic plasticity in traits related to trade-offs in animal performance
dc.typeartículo
dc.volumen22
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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