Selective disappearance of great tits with short telomeres in urban areas

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Ekologi
  • Zoologi

Nyckelord

Originalspråkengelska
Artikelnummer20171349
Antal sidor8
TidskriftProceedings of the Royal Society B: Biological Sciences
Volym284
Utgivningsnummer1862
StatusPublished - 2017 sep 13
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Salmon, P., 2017 okt, Lund: Lund University, Faculty of Science, Department of Biology. 157 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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