Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus)
In the northwest Atlantic Ocean, sea scallop (Placopecten magellanicus) has been characterized by a latitudinal genetic cline with a breakpoint between northern and southern genetic clusters occurring at ~45°N along eastern Nova Scotia, Canada. Using 96 diagnostic single-nucleotide polymorphisms (SN...
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ftpubmed:oai:pubmedcentral.nih.gov:6288113 2023-05-15T17:45:42+02:00 Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) Lehnert, Sarah J. DiBacco, Claudio Van Wyngaarden, Mallory Jeffery, Nicholas W. Ben Lowen, J. Sylvester, Emma V. A. Wringe, Brendan F. Stanley, Ryan R. E. Hamilton, Lorraine C. Bradbury, Ian R. 2018-05-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288113/ http://www.ncbi.nlm.nih.gov/pubmed/29773897 https://doi.org/10.1038/s41437-018-0087-9 en eng Springer International Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288113/ http://www.ncbi.nlm.nih.gov/pubmed/29773897 http://dx.doi.org/10.1038/s41437-018-0087-9 © The Genetics Society 2018 Article Text 2018 ftpubmed https://doi.org/10.1038/s41437-018-0087-9 2020-01-05T01:14:24Z In the northwest Atlantic Ocean, sea scallop (Placopecten magellanicus) has been characterized by a latitudinal genetic cline with a breakpoint between northern and southern genetic clusters occurring at ~45°N along eastern Nova Scotia, Canada. Using 96 diagnostic single-nucleotide polymorphisms (SNPs) capable of discriminating between northern and southern clusters, we examined fine-scale genetic structure of scallops among 27 sample locations, spanning the largest geographic range evaluated in this species to date (~37–51°N). Here, we confirmed previous observations of northern and southern groups, but we show that the boundary between northern and southern clusters is not a discrete latitudinal break. Instead, at latitudes near the previously described boundary, we found unexpected patterns of fine-scale genetic structure occurring between inshore and offshore sites. Scallops from offshore sites, including St. Pierre Bank and the eastern Scotian Shelf, clustered with southern stocks, whereas inshore sites at similar latitudes clustered with northern stocks. Our analyses revealed significant genetic divergence across small spatial scales (i.e., 129–221 km distances), and that spatial structure over large and fine scales was strongly associated with temperature during seasonal periods of thermal minima. Clear temperature differences between inshore and offshore locations may explain the fine-scale structuring observed, such as why southern lineages of scallop occur at higher latitudes in deeper, warmer offshore waters. Our study supports growing evidence that fine-scale population structure in marine species is common, often environmentally associated, and that consideration of environmental and genomic data can significantly enhance the identification of marine diversity and management units. Text Northwest Atlantic PubMed Central (PMC) Canada Heredity 122 1 69 80 |
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Article Lehnert, Sarah J. DiBacco, Claudio Van Wyngaarden, Mallory Jeffery, Nicholas W. Ben Lowen, J. Sylvester, Emma V. A. Wringe, Brendan F. Stanley, Ryan R. E. Hamilton, Lorraine C. Bradbury, Ian R. Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
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In the northwest Atlantic Ocean, sea scallop (Placopecten magellanicus) has been characterized by a latitudinal genetic cline with a breakpoint between northern and southern genetic clusters occurring at ~45°N along eastern Nova Scotia, Canada. Using 96 diagnostic single-nucleotide polymorphisms (SNPs) capable of discriminating between northern and southern clusters, we examined fine-scale genetic structure of scallops among 27 sample locations, spanning the largest geographic range evaluated in this species to date (~37–51°N). Here, we confirmed previous observations of northern and southern groups, but we show that the boundary between northern and southern clusters is not a discrete latitudinal break. Instead, at latitudes near the previously described boundary, we found unexpected patterns of fine-scale genetic structure occurring between inshore and offshore sites. Scallops from offshore sites, including St. Pierre Bank and the eastern Scotian Shelf, clustered with southern stocks, whereas inshore sites at similar latitudes clustered with northern stocks. Our analyses revealed significant genetic divergence across small spatial scales (i.e., 129–221 km distances), and that spatial structure over large and fine scales was strongly associated with temperature during seasonal periods of thermal minima. Clear temperature differences between inshore and offshore locations may explain the fine-scale structuring observed, such as why southern lineages of scallop occur at higher latitudes in deeper, warmer offshore waters. Our study supports growing evidence that fine-scale population structure in marine species is common, often environmentally associated, and that consideration of environmental and genomic data can significantly enhance the identification of marine diversity and management units. |
format |
Text |
author |
Lehnert, Sarah J. DiBacco, Claudio Van Wyngaarden, Mallory Jeffery, Nicholas W. Ben Lowen, J. Sylvester, Emma V. A. Wringe, Brendan F. Stanley, Ryan R. E. Hamilton, Lorraine C. Bradbury, Ian R. |
author_facet |
Lehnert, Sarah J. DiBacco, Claudio Van Wyngaarden, Mallory Jeffery, Nicholas W. Ben Lowen, J. Sylvester, Emma V. A. Wringe, Brendan F. Stanley, Ryan R. E. Hamilton, Lorraine C. Bradbury, Ian R. |
author_sort |
Lehnert, Sarah J. |
title |
Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
title_short |
Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
title_full |
Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
title_fullStr |
Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
title_full_unstemmed |
Fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (Placopecten magellanicus) |
title_sort |
fine-scale temperature-associated genetic structure between inshore and offshore populations of sea scallop (placopecten magellanicus) |
publisher |
Springer International Publishing |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288113/ http://www.ncbi.nlm.nih.gov/pubmed/29773897 https://doi.org/10.1038/s41437-018-0087-9 |
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Canada |
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Canada |
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Northwest Atlantic |
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Northwest Atlantic |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288113/ http://www.ncbi.nlm.nih.gov/pubmed/29773897 http://dx.doi.org/10.1038/s41437-018-0087-9 |
op_rights |
© The Genetics Society 2018 |
op_doi |
https://doi.org/10.1038/s41437-018-0087-9 |
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