Causes and consequences of variation in early‐life telomere length in a bird metapopulation
Abstract Environmental conditions during early‐life development can have lasting effects shaping individual heterogeneity in fitness and fitness‐related traits. The length of telomeres, the DNA sequences protecting chromosome ends, may be affected by early‐life conditions, and telomere length (TL) h...
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Online Access: | http://dx.doi.org/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.9144 |
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crwiley:10.1002/ece3.9144 2024-06-23T07:55:16+00:00 Causes and consequences of variation in early‐life telomere length in a bird metapopulation Pepke, Michael Le Kvalnes, Thomas Ranke, Peter Sjolte Araya‐Ajoy, Yimen G. Wright, Jonathan Sæther, Bernt‐Erik Jensen, Henrik Ringsby, Thor Harald Norges Forskningsråd 2022 http://dx.doi.org/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.9144 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 12, issue 8 ISSN 2045-7758 2045-7758 journal-article 2022 crwiley https://doi.org/10.1002/ece3.9144 2024-05-31T08:11:51Z Abstract Environmental conditions during early‐life development can have lasting effects shaping individual heterogeneity in fitness and fitness‐related traits. The length of telomeres, the DNA sequences protecting chromosome ends, may be affected by early‐life conditions, and telomere length (TL) has been associated with individual performance within some wild animal populations. Thus, knowledge of the mechanisms that generate variation in TL, and the relationship between TL and fitness, is important in understanding the role of telomeres in ecology and life‐history evolution. Here, we investigate how environmental conditions and morphological traits are associated with early‐life blood TL and if TL predicts natal dispersal probability or components of fitness in 2746 wild house sparrow ( Passer domesticus ) nestlings from two populations sampled across 20 years (1994–2013). We retrieved weather data and we monitored population fluctuations, individual survival, and reproductive output using field observations and genetic pedigrees. We found a negative effect of population density on TL, but only in one of the populations. There was a curvilinear association between TL and the maximum daily North Atlantic Oscillation index during incubation, suggesting that there are optimal weather conditions that result in the longest TL. Dispersers tended to have shorter telomeres than non‐dispersers. TL did not predict survival, but we found a tendency for individuals with short telomeres to have higher annual reproductive success. Our study showed how early‐life TL is shaped by effects of growth, weather conditions, and population density, supporting that environmental stressors negatively affect TL in wild populations. In addition, shorter telomeres may be associated with a faster pace‐of‐life, as individuals with higher dispersal rates and annual reproduction tended to have shorter early‐life TL. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Wiley Online Library Ecology and Evolution 12 8 |
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English |
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Abstract Environmental conditions during early‐life development can have lasting effects shaping individual heterogeneity in fitness and fitness‐related traits. The length of telomeres, the DNA sequences protecting chromosome ends, may be affected by early‐life conditions, and telomere length (TL) has been associated with individual performance within some wild animal populations. Thus, knowledge of the mechanisms that generate variation in TL, and the relationship between TL and fitness, is important in understanding the role of telomeres in ecology and life‐history evolution. Here, we investigate how environmental conditions and morphological traits are associated with early‐life blood TL and if TL predicts natal dispersal probability or components of fitness in 2746 wild house sparrow ( Passer domesticus ) nestlings from two populations sampled across 20 years (1994–2013). We retrieved weather data and we monitored population fluctuations, individual survival, and reproductive output using field observations and genetic pedigrees. We found a negative effect of population density on TL, but only in one of the populations. There was a curvilinear association between TL and the maximum daily North Atlantic Oscillation index during incubation, suggesting that there are optimal weather conditions that result in the longest TL. Dispersers tended to have shorter telomeres than non‐dispersers. TL did not predict survival, but we found a tendency for individuals with short telomeres to have higher annual reproductive success. Our study showed how early‐life TL is shaped by effects of growth, weather conditions, and population density, supporting that environmental stressors negatively affect TL in wild populations. In addition, shorter telomeres may be associated with a faster pace‐of‐life, as individuals with higher dispersal rates and annual reproduction tended to have shorter early‐life TL. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Pepke, Michael Le Kvalnes, Thomas Ranke, Peter Sjolte Araya‐Ajoy, Yimen G. Wright, Jonathan Sæther, Bernt‐Erik Jensen, Henrik Ringsby, Thor Harald |
spellingShingle |
Pepke, Michael Le Kvalnes, Thomas Ranke, Peter Sjolte Araya‐Ajoy, Yimen G. Wright, Jonathan Sæther, Bernt‐Erik Jensen, Henrik Ringsby, Thor Harald Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
author_facet |
Pepke, Michael Le Kvalnes, Thomas Ranke, Peter Sjolte Araya‐Ajoy, Yimen G. Wright, Jonathan Sæther, Bernt‐Erik Jensen, Henrik Ringsby, Thor Harald |
author_sort |
Pepke, Michael Le |
title |
Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
title_short |
Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
title_full |
Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
title_fullStr |
Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
title_full_unstemmed |
Causes and consequences of variation in early‐life telomere length in a bird metapopulation |
title_sort |
causes and consequences of variation in early‐life telomere length in a bird metapopulation |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.9144 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.9144 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Ecology and Evolution volume 12, issue 8 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.9144 |
container_title |
Ecology and Evolution |
container_volume |
12 |
container_issue |
8 |
_version_ |
1802647786264461312 |