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Senescence: why and where selection gradients might not decline with age

Patterns of ageing across the tree of life are much more diverse than previously thought. Yet, we still do not adequately understand how, why and where across the tree of life a particular pattern of ageing will evolve. An ability to predict ageing patterns requires a firmer understanding of how and...

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Detalles Bibliográficos
Autores principales: Roper, Mark, Capdevila, Pol, Salguero-Gómez, Roberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8292751/
https://www.ncbi.nlm.nih.gov/pubmed/34284628
http://dx.doi.org/10.1098/rspb.2021.0851
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author Roper, Mark
Capdevila, Pol
Salguero-Gómez, Roberto
author_facet Roper, Mark
Capdevila, Pol
Salguero-Gómez, Roberto
author_sort Roper, Mark
collection PubMed
description Patterns of ageing across the tree of life are much more diverse than previously thought. Yet, we still do not adequately understand how, why and where across the tree of life a particular pattern of ageing will evolve. An ability to predict ageing patterns requires a firmer understanding of how and why different ecological and evolutionary factors alter the sensitivity of fitness to age-related changes in mortality and reproduction. From this understanding, we can ask why and where selection gradients might not decline with age. Here, we begin by summarizing the recent breadth of literature that is unearthing, empirically and theoretically, the mechanisms that drive variation in patters of senescence. We focus on the relevance of two key parameters, population structure and reproductive value, as key to understanding selection gradients, and therefore senescence. We discuss how growth form, individual trade-offs, stage structure and social interactions may all facilitate differing distributions of these two key parameters than those predicted by classical theory. We argue that these four key aspects can help us understand why patterns of negligible and negative senescence can actually be explained under the same evolutionary framework as classical senescence.
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spelling pubmed-82927512021-07-23 Senescence: why and where selection gradients might not decline with age Roper, Mark Capdevila, Pol Salguero-Gómez, Roberto Proc Biol Sci Review Articles Patterns of ageing across the tree of life are much more diverse than previously thought. Yet, we still do not adequately understand how, why and where across the tree of life a particular pattern of ageing will evolve. An ability to predict ageing patterns requires a firmer understanding of how and why different ecological and evolutionary factors alter the sensitivity of fitness to age-related changes in mortality and reproduction. From this understanding, we can ask why and where selection gradients might not decline with age. Here, we begin by summarizing the recent breadth of literature that is unearthing, empirically and theoretically, the mechanisms that drive variation in patters of senescence. We focus on the relevance of two key parameters, population structure and reproductive value, as key to understanding selection gradients, and therefore senescence. We discuss how growth form, individual trade-offs, stage structure and social interactions may all facilitate differing distributions of these two key parameters than those predicted by classical theory. We argue that these four key aspects can help us understand why patterns of negligible and negative senescence can actually be explained under the same evolutionary framework as classical senescence. The Royal Society 2021-07-28 2021-07-21 /pmc/articles/PMC8292751/ /pubmed/34284628 http://dx.doi.org/10.1098/rspb.2021.0851 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Review Articles
Roper, Mark
Capdevila, Pol
Salguero-Gómez, Roberto
Senescence: why and where selection gradients might not decline with age
title Senescence: why and where selection gradients might not decline with age
title_full Senescence: why and where selection gradients might not decline with age
title_fullStr Senescence: why and where selection gradients might not decline with age
title_full_unstemmed Senescence: why and where selection gradients might not decline with age
title_short Senescence: why and where selection gradients might not decline with age
title_sort senescence: why and where selection gradients might not decline with age
topic Review Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8292751/
https://www.ncbi.nlm.nih.gov/pubmed/34284628
http://dx.doi.org/10.1098/rspb.2021.0851
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