Selective disappearance of great tits with short telomeres in urban areas

Research output: Contribution to journalArticle

Abstract

Urban environments pose novel challenges, as well as opportunities, for urban-dwelling wildlife. Although differences have been reported in several phenotypic traits (e.g. morphology, physiology and behaviour) between urban and rural populations, it is poorly understood whether this affects individual fitness. Telomere dynamics are posited as one possible mechanism underlying senescence and mortality. It was recently shown that telomere shortening is accelerated when growing up in an urban, compared with a rural, environment. However, the implications of accelerated telomere attrition for fitness are still unclear. Here, we examine the relationship between telomere length (TL) and survival in a bird common to urban and rural environments, and during both early and later life. The results reveal that TL is a strong predictor of post-fledging survival and recruitment in both habitats but, crucially, selective disappearance of individuals with short telomeres early in life is more pronounced in the urban environment, resulting in a longer average TL among the adult population. However, following recruitment, we found no difference in the relationship between TL and survival between the urban and rural environments. This indicates that the urban environment has negative effects in early life, while during later life the benefits could potentially outweigh the costs.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Ecology
  • Zoology

Keywords

  • urbanization, Parus major
Original languageEnglish
Article number20171349
Number of pages8
JournalProceedings of the Royal Society B: Biological Sciences
Volume284
Issue number1862
Publication statusPublished - 2017 Sep 13
Publication categoryResearch
Peer-reviewedYes

Related research output

Salmon, P., 2017 Oct, Lund: Lund University, Faculty of Science, Department of Biology. 157 p.

Research output: ThesisDoctoral Thesis (compilation)

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