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Provenance does matter: Links between winter trophic segregation and the migratory origins of European robins

2016Journal article Restricted access
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dc.contributor.authorCatry, Paulo
dc.contributor.authorCampos, Ana R.
dc.contributor.authorGranadeiro, José Pedro
dc.contributor.authorNeto, Júlio M.
dc.contributor.authorRamos, Jaime
dc.contributor.authorNewton, Jason
dc.contributor.authorBearhop, Stuart
dc.date.accessioned2016-09-19T17:29:50Z
dc.date.available2016-09-19T17:29:50Z
dc.date.issued2016
dc.description.abstractAmongst migratory species, it is common to find individuals from different populations or geographical origins sharing staging or wintering areas. Given their differing life histories, ecological theory would predict that the different groups of individuals should exhibit some level of niche segregation. This has rarely been investigated because of the difficulty in assigning migrating individuals to breeding areas. Here, we start by documenting a broad geographical gradient of hydrogen isotopes (δ (2)H) in robin Erithacus rubecula feathers across Europe. We then use δ (2)H, as well as wing-tip shape, as surrogates for broad migratory origin of birds wintering in Iberia, to investigate the ecological segregation of populations. Wintering robins of different sexes, ages and body sizes are known to segregate between habitats in Iberia. This has been attributed to the despotic exclusion of inferior competitors from the best patches by dominant individuals. We find no segregation between habitats in relation to δ (2)H in feathers, or to wing-tip shape, which suggests that no major asymmetries in competitive ability exist between migrant robins of different origins. Trophic level (inferred from nitrogen isotopes in blood) correlated both with δ (2)H in feathers and with wing-tip shape, showing that individuals from different geographic origins display a degree of ecological segregation in shared winter quarters. Isotopic mixing models indicate that wintering birds originating from more northerly populations consume more invertebrates. Our multi-scale study suggests that trophic-niche segregation may result from specializations (arising in the population-specific breeding areas) that are transported by the migrants into the shared wintering grounds.pt_PT
dc.description.sponsorshipFundação para a Ciência e a Tecnologia (FCT); Natural Environment Research Councilpt_PT
dc.identifier.citationOecologia, 1-10. doi: 10.1007/s00442-016-3725-zpt_PT
dc.identifier.doi10.1007/s00442-016-3725-zpt_PT
dc.identifier.issn0029-8549
dc.identifier.urihttp://hdl.handle.net/10400.12/4897
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringer Verlagpt_PT
dc.relationIF/00502/2013/CP1186/CT00pt_PT
dc.relationEK106-01/07pt_PT
dc.relationADAPTIVE DIVERGENCE AND CONSERVATION IN THE REED BUNTING EMBERIZA SCHOENICLUS
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs00442-016-3725-zpt_PT
dc.subjectSeasonal matchingpt_PT
dc.subjectEcological segregationpt_PT
dc.subjectErithacus rubeculapt_PT
dc.subjectMigrationpt_PT
dc.subjectStable isotopespt_PT
dc.titleProvenance does matter: Links between winter trophic segregation and the migratory origins of European robinspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleADAPTIVE DIVERGENCE AND CONSERVATION IN THE REED BUNTING EMBERIZA SCHOENICLUS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F30724%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F40667%2F2007/PT
oaire.citation.conferencePlaceGermanypt_PT
oaire.citation.endPage10pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleOecologiapt_PT
oaire.fundingStreamSFRH
oaire.fundingStream5876
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isProjectOfPublication49afb672-e92a-4edf-8011-57d41c6af3ec
relation.isProjectOfPublicationb45075bd-b8ca-49a6-bfec-2030828e7160
relation.isProjectOfPublication74f7ec60-fd9c-4248-9113-ca8373be26a6
relation.isProjectOfPublication.latestForDiscovery74f7ec60-fd9c-4248-9113-ca8373be26a6

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