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Worsley, Sarah F., Davies, Charli S., Lee, Chuen Zhang 
ORCID: https://orcid.org/0000-0003-3107-657X, Mannarelli, Maria-Elena, Burke, Terry, Komdeur, Jan, Dugdale, Hannah L. and Richardson, David S. ORCID: https://orcid.org/0000-0001-7226-9074
(2024)
Longitudinal gut microbiome dynamics in relation to age and senescence in a wild animal population.
Molecular Ecology, 33 (16).
ISSN 0962-1083
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Abstract
In humans, gut microbiome (GM) differences are often correlated with, and sometimes causally implicated in, ageing. However, it is unclear how these findings translate in wild animal populations. Studies that investigate how GM dynamics change within individuals, and with declines in physiological condition, are needed to fully understand links between chronological age, senescence and the GM, but have rarely been done. Here, we use longitudinal data collected from a closed population of Seychelles warblers (Acrocephalus sechellensis) to investigate how bacterial GM alpha diversity, composition and stability are associated with host senescence. We hypothesised that GM diversity and composition will differ, and become more variable, in older adults, particularly in the terminal year prior to death, as the GM becomes increasingly dysregulated due to senescence. However, GM alpha diversity and composition remained largely invariable with respect to adult age and did not differ in an individual's terminal year. Furthermore, there was no evidence that the GM became more heterogenous in senescent age groups (individuals older than 6 years), or in the terminal year. Instead, environmental variables such as season, territory quality and time of day, were the strongest predictors of GM variation in adult Seychelles warblers. These results contrast with studies on humans, captive animal populations and some (but not all) studies on non-human primates, suggesting that GM deterioration may not be a universal hallmark of senescence in wild animal species. Further work is needed to disentangle the factors driving variation in GM-senescence relationships across different host taxa.
| Item Type: | Article |
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| Additional Information: | Data availability statement: All 16S rRNA gene amplicon sequences have been submitted to the European Nucleotide Archive (ENA) database under the study accession numbers PRJEB45408 (samples taken in 2017 and 2018) and PRJEB47095 (samples taken in 2019 and 2020) and PRJEB67634 (samples taken in 2021 and 2022). The scripts and metadata to reproduce all analyses and figures can be accessed via the GitHub repository, https://github.com/Seychelle-Warbler-Project and have been archived in the Dryad repository, https://doi.org/10.5061/dryad.44j0zpcp7 (Worsley et al., 2024). Funding Information: This study was funded by a Natural Environment Research Council (NERC) NBAF Pilot Scheme Grant (NBAF1092) awarded to DSR and a NERC grant (NE/S010939/1) awarded to DSR and HLD. CSD was funded by a NERC PhD studentship (NERC EnvEast Doctoral Training Programme grant NE/L002582/1). CZL was supported by the UKRI BBSRC Norwich Research Park Biosciences Doctoral Training Partnership (Grant number BB/T008717/1). |
| Uncontrolled Keywords: | acrocephalus sechellensis,ageing,gut microbiome,life history,senescence,ecology, evolution, behavior and systematics,genetics ,/dk/atira/pure/subjectarea/asjc/1100/1105 |
| Faculty \ School: | Faculty of Science > School of Biological Sciences |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 05 Nov 2024 12:30 |
| Last Modified: | 10 Nov 2024 06:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/97509 |
| DOI: | 10.1111/mec.17477 |
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