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Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows
The ability to respond appropriately to challenges is an important contributor to fitness. Variation in the regulation of glucocorticoid hormones, which mediate the phenotypic response to challenges, can therefore influence the ability to persist in a given environment. We compared stress responsive...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7426823/ https://www.ncbi.nlm.nih.gov/pubmed/32792550 http://dx.doi.org/10.1038/s41598-020-70161-4 |
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author | Zimmer, Cedric Taff, Conor C. Ardia, Daniel R. Rose, Alexandra P. Aborn, David A. Johnson, L. Scott Vitousek, Maren N. |
author_facet | Zimmer, Cedric Taff, Conor C. Ardia, Daniel R. Rose, Alexandra P. Aborn, David A. Johnson, L. Scott Vitousek, Maren N. |
author_sort | Zimmer, Cedric |
collection | PubMed |
description | The ability to respond appropriately to challenges is an important contributor to fitness. Variation in the regulation of glucocorticoid hormones, which mediate the phenotypic response to challenges, can therefore influence the ability to persist in a given environment. We compared stress responsiveness in four populations of tree swallows (Tachycineta bicolor) breeding under different environmental conditions to evaluate support for different selective pressures in driving the evolution of glucocorticoid regulation. In accordance with the environmental unpredictability hypothesis, stronger stress responses were seen in more unpredictable environments. Contrary to the reproductive value hypothesis, the stress response was not lower in populations engaging in more valuable reproductive attempts. Populations with stronger stress responses also had stronger negative feedback, which supports a “mitigating” rather than a “magnifying” effect of negative feedback on stress responses. These results suggest that combining a robust stress response with strong negative feedback may be important for persisting in unpredictable or rapidly changing environments. |
format | Online Article Text |
id | pubmed-7426823 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-74268232020-08-14 Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows Zimmer, Cedric Taff, Conor C. Ardia, Daniel R. Rose, Alexandra P. Aborn, David A. Johnson, L. Scott Vitousek, Maren N. Sci Rep Article The ability to respond appropriately to challenges is an important contributor to fitness. Variation in the regulation of glucocorticoid hormones, which mediate the phenotypic response to challenges, can therefore influence the ability to persist in a given environment. We compared stress responsiveness in four populations of tree swallows (Tachycineta bicolor) breeding under different environmental conditions to evaluate support for different selective pressures in driving the evolution of glucocorticoid regulation. In accordance with the environmental unpredictability hypothesis, stronger stress responses were seen in more unpredictable environments. Contrary to the reproductive value hypothesis, the stress response was not lower in populations engaging in more valuable reproductive attempts. Populations with stronger stress responses also had stronger negative feedback, which supports a “mitigating” rather than a “magnifying” effect of negative feedback on stress responses. These results suggest that combining a robust stress response with strong negative feedback may be important for persisting in unpredictable or rapidly changing environments. Nature Publishing Group UK 2020-08-13 /pmc/articles/PMC7426823/ /pubmed/32792550 http://dx.doi.org/10.1038/s41598-020-70161-4 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Zimmer, Cedric Taff, Conor C. Ardia, Daniel R. Rose, Alexandra P. Aborn, David A. Johnson, L. Scott Vitousek, Maren N. Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title | Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title_full | Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title_fullStr | Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title_full_unstemmed | Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title_short | Environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
title_sort | environmental unpredictability shapes glucocorticoid regulation across populations of tree swallows |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7426823/ https://www.ncbi.nlm.nih.gov/pubmed/32792550 http://dx.doi.org/10.1038/s41598-020-70161-4 |
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