Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species

Abstract Understanding source-sink dynamics is important for conservation management, particularly when climatic events alter species’ distributions. Following a 2011 ‘marine heatwave’ in Western Australia, we observed high recruitment of the endemic fisheries target species Choerodon rubescens, tow...

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Autores principales:	Katherine Cure, Luke Thomas, Jean-Paul A. Hobbs, David V. Fairclough, W. Jason Kennington
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/793c346294b343a8abbe684fdc2a4e02
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spelling	oai:doaj.org-article:793c346294b343a8abbe684fdc2a4e022021-12-02T16:06:20ZGenomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species10.1038/s41598-017-09224-y2045-2322https://doaj.org/article/793c346294b343a8abbe684fdc2a4e022017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09224-yhttps://doaj.org/toc/2045-2322Abstract Understanding source-sink dynamics is important for conservation management, particularly when climatic events alter species’ distributions. Following a 2011 ‘marine heatwave’ in Western Australia, we observed high recruitment of the endemic fisheries target species Choerodon rubescens, towards the cooler (southern) end of its distribution. Here, we use a genome wide set of 14 559 single-nucleotide polymorphisms (SNPs) to identify the likely source population for this recruitment event. Most loci (76%) showed low genetic divergence across the species’ range, indicating high levels of gene flow and confirming previous findings using neutral microsatellite markers. However, a small proportion of loci showed strong patterns of differentiation and exhibited patterns of population structure consistent with local adaptation. Clustering analyses based on these outlier loci indicated that recruits at the southern end of C. rubescens’ range originated 400 km to the north, at the centre of the species’ range, where average temperatures are up to 3 °C warmer. Survival of these recruits may be low because they carry alleles adapted to an environment different to the one they now reside in, but their survival is key to establishing locally adapted populations at and beyond the range edge as water temperatures increase with climate change.Katherine CureLuke ThomasJean-Paul A. HobbsDavid V. FaircloughW. Jason KenningtonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Katherine Cure Luke Thomas Jean-Paul A. Hobbs David V. Fairclough W. Jason Kennington Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
description	Abstract Understanding source-sink dynamics is important for conservation management, particularly when climatic events alter species’ distributions. Following a 2011 ‘marine heatwave’ in Western Australia, we observed high recruitment of the endemic fisheries target species Choerodon rubescens, towards the cooler (southern) end of its distribution. Here, we use a genome wide set of 14 559 single-nucleotide polymorphisms (SNPs) to identify the likely source population for this recruitment event. Most loci (76%) showed low genetic divergence across the species’ range, indicating high levels of gene flow and confirming previous findings using neutral microsatellite markers. However, a small proportion of loci showed strong patterns of differentiation and exhibited patterns of population structure consistent with local adaptation. Clustering analyses based on these outlier loci indicated that recruits at the southern end of C. rubescens’ range originated 400 km to the north, at the centre of the species’ range, where average temperatures are up to 3 °C warmer. Survival of these recruits may be low because they carry alleles adapted to an environment different to the one they now reside in, but their survival is key to establishing locally adapted populations at and beyond the range edge as water temperatures increase with climate change.
format	article
author	Katherine Cure Luke Thomas Jean-Paul A. Hobbs David V. Fairclough W. Jason Kennington
author_facet	Katherine Cure Luke Thomas Jean-Paul A. Hobbs David V. Fairclough W. Jason Kennington
author_sort	Katherine Cure
title	Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
title_short	Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
title_full	Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
title_fullStr	Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
title_full_unstemmed	Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
title_sort	genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/793c346294b343a8abbe684fdc2a4e02
work_keys_str_mv	AT katherinecure genomicsignaturesoflocaladaptationrevealsourcesinkdynamicsinahighgeneflowfishspecies AT lukethomas genomicsignaturesoflocaladaptationrevealsourcesinkdynamicsinahighgeneflowfishspecies AT jeanpaulahobbs genomicsignaturesoflocaladaptationrevealsourcesinkdynamicsinahighgeneflowfishspecies AT davidvfairclough genomicsignaturesoflocaladaptationrevealsourcesinkdynamicsinahighgeneflowfishspecies AT wjasonkennington genomicsignaturesoflocaladaptationrevealsourcesinkdynamicsinahighgeneflowfishspecies
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Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species

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