Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters

Aim: We investigated the population genetic structure of a highly mobile marine species, the striped dolphin, Stenella coeruleoalba (Meyen, 1833), along a geographical range with habitat transitions and historical dynamics to identify the causes of genetic divergence, and to assess the effect of pas...

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Published in:Journal of Biogeography
Main Author: Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R.
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Online Access:http://hdl.handle.net/11615/72427
https://doi.org/10.1111/jbi.13079
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spelling ftunivthessaly:oai:ir.lib.uth.gr:11615/72427 2023-05-15T17:29:15+02:00 Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R. 2017 http://hdl.handle.net/11615/72427 https://doi.org/10.1111/jbi.13079 en eng doi:10.1111/jbi.13079 03050270 http://hdl.handle.net/11615/72427 Journal of Biogeography https://www.scopus.com/inward/record.uri?eid=2-s2.0-85035051454&doi=10.1111%2fjbi.13079&partnerID=40&md5=8c952aab466eb7fb28aee72dfac748ef climate variation demographic history divergence dolphin gene flow genetic structure Holocene Pleistocene population structure Atlantic Ocean Atlantic Ocean (North) Mediterranean Sea Stenella (Cetacea) Stenella coeruleoalba Blackwell Publishing Ltd journalArticle 2017 ftunivthessaly https://doi.org/10.1111/jbi.13079 2023-02-02T17:34:20Z Aim: We investigated the population genetic structure of a highly mobile marine species, the striped dolphin, Stenella coeruleoalba (Meyen, 1833), along a geographical range with habitat transitions and historical dynamics to identify the causes of genetic divergence, and to assess the effect of past climate change on demography and population connectivity. Location: North-east Atlantic Ocean and Mediterranean Sea. Methods: Twenty microsatellite loci were used in conjunction with coalescent methods to investigate the genetic structure and demographic history of striped dolphins (Stenella coeruleoalba) in the Mediterranean Sea and eastern North Atlantic Ocean. Approximate Bayesian modelling was used to compare the support for alternative scenarios for the pattern of divergence over time in the context of known geographical transitions and environmental change over the course of the Quaternary. Results: We describe a novel pattern of structure among the extant populations along north–south and east–west axes. Modern gene flow shows strong directionality from north-east to south and west in the North Atlantic, and from west to east in the Mediterranean. On a temporal scale we found evidence for a progression starting with a division between the North Atlantic and Mediterranean Sea populations during the middle Pleistocene, followed by a division within the Mediterranean between the east and west basins towards the end of the Pleistocene, and finally an east–west division in the eastern North Atlantic at the start of the Holocene. Main conclusions: In the context of known population structure for other marine species along the same geographical range, our data facilitate inference of the more general processes that shaped patterns of biogeography across this region through the environmental transitions of the Quaternary. In particular, Pleistocene era divisions apparently reflect strong physical habitat boundaries, with later divisions associated with climate warming in the Holocene. © 2017 John Wiley & Sons Ltd Article in Journal/Newspaper North Atlantic North East Atlantic University of Thessaly Institutional Repository Journal of Biogeography 44 12 2681 2691
institution Open Polar
collection University of Thessaly Institutional Repository
op_collection_id ftunivthessaly
language English
topic climate variation
demographic history
divergence
dolphin
gene flow
genetic structure
Holocene
Pleistocene
population structure
Atlantic Ocean
Atlantic Ocean (North)
Mediterranean Sea
Stenella (Cetacea)
Stenella coeruleoalba
Blackwell Publishing Ltd
spellingShingle climate variation
demographic history
divergence
dolphin
gene flow
genetic structure
Holocene
Pleistocene
population structure
Atlantic Ocean
Atlantic Ocean (North)
Mediterranean Sea
Stenella (Cetacea)
Stenella coeruleoalba
Blackwell Publishing Ltd
Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R.
Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
topic_facet climate variation
demographic history
divergence
dolphin
gene flow
genetic structure
Holocene
Pleistocene
population structure
Atlantic Ocean
Atlantic Ocean (North)
Mediterranean Sea
Stenella (Cetacea)
Stenella coeruleoalba
Blackwell Publishing Ltd
description Aim: We investigated the population genetic structure of a highly mobile marine species, the striped dolphin, Stenella coeruleoalba (Meyen, 1833), along a geographical range with habitat transitions and historical dynamics to identify the causes of genetic divergence, and to assess the effect of past climate change on demography and population connectivity. Location: North-east Atlantic Ocean and Mediterranean Sea. Methods: Twenty microsatellite loci were used in conjunction with coalescent methods to investigate the genetic structure and demographic history of striped dolphins (Stenella coeruleoalba) in the Mediterranean Sea and eastern North Atlantic Ocean. Approximate Bayesian modelling was used to compare the support for alternative scenarios for the pattern of divergence over time in the context of known geographical transitions and environmental change over the course of the Quaternary. Results: We describe a novel pattern of structure among the extant populations along north–south and east–west axes. Modern gene flow shows strong directionality from north-east to south and west in the North Atlantic, and from west to east in the Mediterranean. On a temporal scale we found evidence for a progression starting with a division between the North Atlantic and Mediterranean Sea populations during the middle Pleistocene, followed by a division within the Mediterranean between the east and west basins towards the end of the Pleistocene, and finally an east–west division in the eastern North Atlantic at the start of the Holocene. Main conclusions: In the context of known population structure for other marine species along the same geographical range, our data facilitate inference of the more general processes that shaped patterns of biogeography across this region through the environmental transitions of the Quaternary. In particular, Pleistocene era divisions apparently reflect strong physical habitat boundaries, with later divisions associated with climate warming in the Holocene. © 2017 John Wiley & Sons Ltd
format Article in Journal/Newspaper
author Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R.
author_facet Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R.
author_sort Gkafas G.A., Exadactylos A., Rogan E., Raga J.A., Reid R., Hoelzel A.R.
title Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
title_short Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
title_full Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
title_fullStr Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
title_full_unstemmed Biogeography and temporal progression during the evolution of striped dolphin population structure in European waters
title_sort biogeography and temporal progression during the evolution of striped dolphin population structure in european waters
publishDate 2017
url http://hdl.handle.net/11615/72427
https://doi.org/10.1111/jbi.13079
genre North Atlantic
North East Atlantic
genre_facet North Atlantic
North East Atlantic
op_source Journal of Biogeography
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85035051454&doi=10.1111%2fjbi.13079&partnerID=40&md5=8c952aab466eb7fb28aee72dfac748ef
op_relation doi:10.1111/jbi.13079
03050270
http://hdl.handle.net/11615/72427
op_doi https://doi.org/10.1111/jbi.13079
container_title Journal of Biogeography
container_volume 44
container_issue 12
container_start_page 2681
op_container_end_page 2691
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