2021
DOI: 10.1101/2021.12.21.473625
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From climate warming to accelerated cellular ageing: an experimental study in wild birds

Abstract: Climate change is increasing both the average ambient temperature and the frequency and severity of heat waves. While direct mortality induced by heat waves is increasingly reported, sub-lethal effects are also likely to impact wild populations. We hypothesized that accelerated ageing could be a cost of being exposed to higher ambient temperature, especially in early-life when thermoregulatory capacities are not fully developed. We tested this hypothesis in wild great tit (Parus major) by experimentally incre… Show more

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Cited by 6 publications
(7 citation statements)
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“…Samples meeting our quality checks were then diluted at 1.2 ng/μL in sterile H2O and stored at -80°C until qPCR assays. mtDNAcn was quantified using real-time quantitative PCR (qPCR) assays as previously described for other passerine species (Stier et al, 2019;Stier et al, 2020) and great tits (Hsu et al, 2021;Stier et al, 2021). This technique estimates the relative mtDNAcn by determining the ratio of mtDNA repeat copy number to a nuclear singly copy gene (SCG).…”
Section: Mitochondrial Dna Copy Numbermentioning
confidence: 99%
“…Samples meeting our quality checks were then diluted at 1.2 ng/μL in sterile H2O and stored at -80°C until qPCR assays. mtDNAcn was quantified using real-time quantitative PCR (qPCR) assays as previously described for other passerine species (Stier et al, 2019;Stier et al, 2020) and great tits (Hsu et al, 2021;Stier et al, 2021). This technique estimates the relative mtDNAcn by determining the ratio of mtDNA repeat copy number to a nuclear singly copy gene (SCG).…”
Section: Mitochondrial Dna Copy Numbermentioning
confidence: 99%
“…Also, there was no impact on nestling TL after experimental cooling of wild eastern bluebird ( Sialia sialis ) nestlings (Lynn et al, 2022). On the other hand, artificially increasing temperatures of wild great tit ( Parus major ) nestlings decreased juvenile TL (Stier et al, 2021), and a recent observational study in nestling purple‐crowned fairy wrens ( Malurus coronatus ) in tropical NW Australia found that nestlings exposed to hot conditions had shorter telomeres (Eastwood et al, 2022). However, the latter effect of heat in fairy wrens was ameliorated during the wet season and when there had been recent rainfall events.…”
Section: Introductionmentioning
confidence: 99%
“…Here we experimentally tested whether the catabolic actions of high glucocorticoid concentrations can be counteracted by the effects of high nucleotide availability on telomere dynamics during growth using a wild avian model ( Parus major , great tit) with known effects of glucocorticoids on telomere length during a phase of rapid growth (Casagrande et al, 2020). The great tit is a common passerine found throughout Europe and Asia that has become a popular model species for ecological studies in a variety of research areas (Hau et al, 2022; Laine et al, 2016; Ouyang et al, 2012; Regan & Sheldon, 2023; Verhagen et al, 2020), including telomere length (Atema et al, 2021; Casagrande et al, 2020; Stier et al, 2016, 2021), mitochondrial (Casagrande et al, 2020; Nord et al, 2021) and gene expression studies (Lindner et al, 2021). Great tits have been found to exhibit substantial variation in telomere length (Atema et al, 2019), which has been linked to various life history traits and environmental factors (Casagrande et al, 2020; Stier et al, 2016, 2021).…”
Section: Introductionmentioning
confidence: 99%
“…The great tit is a common passerine found throughout Europe and Asia that has become a popular model species for ecological studies in a variety of research areas (Hau et al, 2022;Laine et al, 2016;Ouyang et al, 2012;Regan & Sheldon, 2023;Verhagen et al, 2020), including telomere length (Atema et al, 2021;Casagrande et al, 2020;Stier et al, 2016Stier et al, , 2021, mitochondrial (Casagrande et al, 2020;Nord et al, 2021) and gene expression studies (Lindner et al, 2021). Great tits have been found to exhibit substantial variation in telomere length (Atema et al, 2019), which has been linked to various life history traits and environmental factors (Casagrande et al, 2020;Stier et al, 2016Stier et al, , 2021. Here we investigated the combined effects of administration of corticosterone and nucleotides on early-life telomere length.…”
Section: Introductionmentioning
confidence: 99%