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

Katherine Cure, Luke Thomas, Jean Paul A. Hobbs, David V. Fairclough, W. Jason Kennington

Research output: Contribution to journalArticle

  • 1 Citations

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.

LanguageEnglish
Article number8618
Number of pages10
JournalScientific Reports
Volume7
Issue number1
DOIs
StatePublished - 1 Dec 2017

Fingerprint

Gene Flow
Fishes
Population
Fisheries
Western Australia
Temperature
Climate Change
Microsatellite Repeats
Single Nucleotide Polymorphism
Cluster Analysis
Alleles
Genome
Water

Cite this

@article{ef1c5164daec4cedb723757fa4ee1a81,
title = "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, 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.",
author = "Katherine Cure and Luke Thomas and Hobbs, {Jean Paul A.} and Fairclough, {David V.} and Kennington, {W. Jason}",
year = "2017",
month = "12",
day = "1",
doi = "10.1038/s41598-017-09224-y",
language = "English",
volume = "7",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group - Macmillan Publishers",
number = "1",

}

Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species. / Cure, Katherine; Thomas, Luke; Hobbs, Jean Paul A.; Fairclough, David V.; Kennington, W. Jason.

In: Scientific Reports, Vol. 7, No. 1, 8618, 01.12.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Genomic signatures of local adaptation reveal source-sink dynamics in a high gene flow fish species

AU - Cure,Katherine

AU - Thomas,Luke

AU - Hobbs,Jean Paul A.

AU - Fairclough,David V.

AU - Kennington,W. Jason

PY - 2017/12/1

Y1 - 2017/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85027704382&partnerID=8YFLogxK

U2 - 10.1038/s41598-017-09224-y

DO - 10.1038/s41598-017-09224-y

M3 - Article

VL - 7

JO - Scientific Reports

T2 - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 8618

ER -