Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression
Herein, we use genetic data from 277 sleeper sharks to perform coalescent‐based modeling to test the hypothesis of early Quaternary emergence of the Greenland shark (Somniosus microcephalus) from ancestral sleeper sharks in the Canadian Arctic‐Subarctic region. Our results show that morphologically...
Published in: | Ecology and Evolution |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
John Wiley and Sons Inc.
2017
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5632604/ http://www.ncbi.nlm.nih.gov/pubmed/29043060 https://doi.org/10.1002/ece3.3325 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:5632604 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:5632604 2023-05-15T14:41:25+02:00 Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression Walter, Ryan P. Roy, Denis Hussey, Nigel E. Stelbrink, Björn Kovacs, Kit M. Lydersen, Christian McMeans, Bailey C. Svavarsson, Jörundur Kessel, Steven T. Biton Porsmoguer, Sebastián Wildes, Sharon Tribuzio, Cindy A. Campana, Steven E. Petersen, Stephen D. Grubbs, R. Dean Heath, Daniel D. Hedges, Kevin J. Fisk, Aaron T. 2017-09-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5632604/ http://www.ncbi.nlm.nih.gov/pubmed/29043060 https://doi.org/10.1002/ece3.3325 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5632604/ http://www.ncbi.nlm.nih.gov/pubmed/29043060 http://dx.doi.org/10.1002/ece3.3325 © 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Original Research Text 2017 ftpubmed https://doi.org/10.1002/ece3.3325 2017-10-22T00:07:05Z Herein, we use genetic data from 277 sleeper sharks to perform coalescent‐based modeling to test the hypothesis of early Quaternary emergence of the Greenland shark (Somniosus microcephalus) from ancestral sleeper sharks in the Canadian Arctic‐Subarctic region. Our results show that morphologically cryptic somniosids S. microcephalus and Somniosus pacificus can be genetically distinguished using combined mitochondrial and nuclear DNA markers. Our data confirm the presence of genetically admixed individuals in the Canadian Arctic and sub‐Arctic, and temperate Eastern Atlantic regions, suggesting introgressive hybridization upon secondary contact following the initial species divergence. Conservative substitution rates fitted to an Isolation with Migration (IM) model indicate a likely species divergence time of 2.34 Ma, using the mitochondrial sequence DNA, which in conjunction with the geographic distribution of admixtures and Pacific signatures likely indicates speciation associated with processes other than the closing of the Isthmus of Panama. This time span coincides with further planetary cooling in the early Quaternary period followed by the onset of oscillating glacial‐interglacial cycles. We propose that the initial S. microcephalus–S. pacificus split, and subsequent hybridization events, were likely associated with the onset of Pleistocene glacial oscillations, whereby fluctuating sea levels constrained connectivity among Arctic oceanic basins, Arctic marginal seas, and the North Atlantic Ocean. Our data demonstrates support for the evolutionary consequences of oscillatory vicariance via transient oceanic isolation with subsequent secondary contact associated with fluctuating sea levels throughout the Quaternary period—which may serve as a model for the origins of Arctic marine fauna on a broad taxonomic scale. Text Arctic Greenland North Atlantic Somniosus microcephalus Subarctic PubMed Central (PMC) Arctic Greenland Pacific Ecology and Evolution 7 19 8113 8125 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Original Research |
spellingShingle |
Original Research Walter, Ryan P. Roy, Denis Hussey, Nigel E. Stelbrink, Björn Kovacs, Kit M. Lydersen, Christian McMeans, Bailey C. Svavarsson, Jörundur Kessel, Steven T. Biton Porsmoguer, Sebastián Wildes, Sharon Tribuzio, Cindy A. Campana, Steven E. Petersen, Stephen D. Grubbs, R. Dean Heath, Daniel D. Hedges, Kevin J. Fisk, Aaron T. Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
topic_facet |
Original Research |
description |
Herein, we use genetic data from 277 sleeper sharks to perform coalescent‐based modeling to test the hypothesis of early Quaternary emergence of the Greenland shark (Somniosus microcephalus) from ancestral sleeper sharks in the Canadian Arctic‐Subarctic region. Our results show that morphologically cryptic somniosids S. microcephalus and Somniosus pacificus can be genetically distinguished using combined mitochondrial and nuclear DNA markers. Our data confirm the presence of genetically admixed individuals in the Canadian Arctic and sub‐Arctic, and temperate Eastern Atlantic regions, suggesting introgressive hybridization upon secondary contact following the initial species divergence. Conservative substitution rates fitted to an Isolation with Migration (IM) model indicate a likely species divergence time of 2.34 Ma, using the mitochondrial sequence DNA, which in conjunction with the geographic distribution of admixtures and Pacific signatures likely indicates speciation associated with processes other than the closing of the Isthmus of Panama. This time span coincides with further planetary cooling in the early Quaternary period followed by the onset of oscillating glacial‐interglacial cycles. We propose that the initial S. microcephalus–S. pacificus split, and subsequent hybridization events, were likely associated with the onset of Pleistocene glacial oscillations, whereby fluctuating sea levels constrained connectivity among Arctic oceanic basins, Arctic marginal seas, and the North Atlantic Ocean. Our data demonstrates support for the evolutionary consequences of oscillatory vicariance via transient oceanic isolation with subsequent secondary contact associated with fluctuating sea levels throughout the Quaternary period—which may serve as a model for the origins of Arctic marine fauna on a broad taxonomic scale. |
format |
Text |
author |
Walter, Ryan P. Roy, Denis Hussey, Nigel E. Stelbrink, Björn Kovacs, Kit M. Lydersen, Christian McMeans, Bailey C. Svavarsson, Jörundur Kessel, Steven T. Biton Porsmoguer, Sebastián Wildes, Sharon Tribuzio, Cindy A. Campana, Steven E. Petersen, Stephen D. Grubbs, R. Dean Heath, Daniel D. Hedges, Kevin J. Fisk, Aaron T. |
author_facet |
Walter, Ryan P. Roy, Denis Hussey, Nigel E. Stelbrink, Björn Kovacs, Kit M. Lydersen, Christian McMeans, Bailey C. Svavarsson, Jörundur Kessel, Steven T. Biton Porsmoguer, Sebastián Wildes, Sharon Tribuzio, Cindy A. Campana, Steven E. Petersen, Stephen D. Grubbs, R. Dean Heath, Daniel D. Hedges, Kevin J. Fisk, Aaron T. |
author_sort |
Walter, Ryan P. |
title |
Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
title_short |
Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
title_full |
Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
title_fullStr |
Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
title_full_unstemmed |
Origins of the Greenland shark (Somniosus microcephalus): Impacts of ice‐olation and introgression |
title_sort |
origins of the greenland shark (somniosus microcephalus): impacts of ice‐olation and introgression |
publisher |
John Wiley and Sons Inc. |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5632604/ http://www.ncbi.nlm.nih.gov/pubmed/29043060 https://doi.org/10.1002/ece3.3325 |
geographic |
Arctic Greenland Pacific |
geographic_facet |
Arctic Greenland Pacific |
genre |
Arctic Greenland North Atlantic Somniosus microcephalus Subarctic |
genre_facet |
Arctic Greenland North Atlantic Somniosus microcephalus Subarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5632604/ http://www.ncbi.nlm.nih.gov/pubmed/29043060 http://dx.doi.org/10.1002/ece3.3325 |
op_rights |
© 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.3325 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
19 |
container_start_page |
8113 |
op_container_end_page |
8125 |
_version_ |
1766313196605407232 |