Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

Abstract Animals often show reduced reproductive success in urban compared to adjacent natural areas. The lower availability and quality of natural food in cities is suggested as one key limiting factor. However, only few studies have provided conclusive support by simultaneously assessing food avai...

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Autores principales:	Christopher J. Pollock, Pablo Capilla-Lasheras, Rona A. R. McGill, Barbara Helm, Davide M. Dominoni
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a06145a859b541a7856ebf62e8bc3553
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spelling	oai:doaj.org-article:a06145a859b541a7856ebf62e8bc35532021-12-02T16:06:21ZIntegrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)10.1038/s41598-017-04575-y2045-2322https://doaj.org/article/a06145a859b541a7856ebf62e8bc35532017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04575-yhttps://doaj.org/toc/2045-2322Abstract Animals often show reduced reproductive success in urban compared to adjacent natural areas. The lower availability and quality of natural food in cities is suggested as one key limiting factor. However, only few studies have provided conclusive support by simultaneously assessing food availability, diet and fitness. We consolidate this evidence by taking a holistic approach, comparing blue tits breeding in forest, suburban and urban areas. We (a) assessed arthropod availability, (b) investigated parental provisioning behaviour, (c) inferred diet through stable isotope analysis, and (d) measured reproductive success. At the urban site, we found a significant reduction in caterpillar availability, the main food source of blue tits, and consequently urban tits fed their offspring with fewer caterpillars than forest and suburban birds. Stable isotope analysis confirmed that diet in the urban area was fundamentally different than in the other sites. Reproductive success was lower in both urban and suburban sites compared to the forest site, and was positively associated with volume of provisioned caterpillars. Our findings provide strong integrative evidence that urban blue tit nestlings are not receiving a suitable diet, and this may be an important limiting factor for urban populations of this and potentially many other species.Christopher J. PollockPablo Capilla-LasherasRona A. R. McGillBarbara HelmDavide M. DominoniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christopher J. Pollock Pablo Capilla-Lasheras Rona A. R. McGill Barbara Helm Davide M. Dominoni Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
description	Abstract Animals often show reduced reproductive success in urban compared to adjacent natural areas. The lower availability and quality of natural food in cities is suggested as one key limiting factor. However, only few studies have provided conclusive support by simultaneously assessing food availability, diet and fitness. We consolidate this evidence by taking a holistic approach, comparing blue tits breeding in forest, suburban and urban areas. We (a) assessed arthropod availability, (b) investigated parental provisioning behaviour, (c) inferred diet through stable isotope analysis, and (d) measured reproductive success. At the urban site, we found a significant reduction in caterpillar availability, the main food source of blue tits, and consequently urban tits fed their offspring with fewer caterpillars than forest and suburban birds. Stable isotope analysis confirmed that diet in the urban area was fundamentally different than in the other sites. Reproductive success was lower in both urban and suburban sites compared to the forest site, and was positively associated with volume of provisioned caterpillars. Our findings provide strong integrative evidence that urban blue tit nestlings are not receiving a suitable diet, and this may be an important limiting factor for urban populations of this and potentially many other species.
format	article
author	Christopher J. Pollock Pablo Capilla-Lasheras Rona A. R. McGill Barbara Helm Davide M. Dominoni
author_facet	Christopher J. Pollock Pablo Capilla-Lasheras Rona A. R. McGill Barbara Helm Davide M. Dominoni
author_sort	Christopher J. Pollock
title	Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
title_short	Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
title_full	Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
title_fullStr	Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
title_full_unstemmed	Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)
title_sort	integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (cyanistes caeruleus)
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a06145a859b541a7856ebf62e8bc3553
work_keys_str_mv	AT christopherjpollock integratedbehaviouralandstableisotopedatarevealaltereddietlinkedtolowbreedingsuccessinurbandwellingbluetitscyanistescaeruleus AT pablocapillalasheras integratedbehaviouralandstableisotopedatarevealaltereddietlinkedtolowbreedingsuccessinurbandwellingbluetitscyanistescaeruleus AT ronaarmcgill integratedbehaviouralandstableisotopedatarevealaltereddietlinkedtolowbreedingsuccessinurbandwellingbluetitscyanistescaeruleus AT barbarahelm integratedbehaviouralandstableisotopedatarevealaltereddietlinkedtolowbreedingsuccessinurbandwellingbluetitscyanistescaeruleus AT davidemdominoni integratedbehaviouralandstableisotopedatarevealaltereddietlinkedtolowbreedingsuccessinurbandwellingbluetitscyanistescaeruleus
_version_	1718385042222219264

Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

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