Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters
Background: Understanding the role of seascape in shaping genetic and demographic population structure is highly challenging for marine pelagic species such as cetaceans for which there is generally little evidence of what could effectively restrict their dispersal. In the present work, we applied a...
Published in: | BMC Biology |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2007
|
Subjects: | |
Online Access: | https://archive-ouverte.unige.ch/unige:18207 |
id |
ftunivgeneve:oai:unige.ch:aou:unige:18207 |
---|---|
record_format |
openpolar |
spelling |
ftunivgeneve:oai:unige.ch:aou:unige:18207 2023-10-01T03:56:29+02:00 Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters Fontaine, Michaël C. Baird, Stuart JE. Piry, Sylvain Ray, Nicolas Tolley, Krystal A. Duke, Sarah Birkun, Alexei Ferreira, Marisa Jauniaux, Thierry Llavona, Ángela Öztürk, Bayram Öztürk, Ayaka A. Ridoux, Vincent Rogan, Emer Sequeira, Marina Siebert, Ursula Vikingsson, Gísli A. Bouquegneau, Jean-Marie Michaux, Johan R. 2007 https://archive-ouverte.unige.ch/unige:18207 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1186/1741-7007-5-30 https://archive-ouverte.unige.ch/unige:18207 unige:18207 info:eu-repo/semantics/openAccess ISSN: 1741-7007 BMC biology, vol. 5, no. 1 (2007) 30 ocean cetacean population genetics least-cost path spatial analysis info:eu-repo/semantics/article Text Article scientifique info:eu-repo/semantics/publishedVersion 2007 ftunivgeneve https://doi.org/10.1186/1741-7007-5-30 2023-09-07T07:00:38Z Background: Understanding the role of seascape in shaping genetic and demographic population structure is highly challenging for marine pelagic species such as cetaceans for which there is generally little evidence of what could effectively restrict their dispersal. In the present work, we applied a combination of recent individual-based landscape genetic approaches to investigate the population genetic structure of a highly mobile extensive range cetacean, the harbour porpoise in the eastern North Atlantic, with regards to oceanographic characteristics that could constrain its dispersal. Results: Analyses of 10 microsatellite loci for 752 individuals revealed that most of the sampled range in the eastern North Atlantic behaves as a 'continuous' population that widely extends over thousands of kilometres with significant isolation by distance (IBD). However, strong barriers to gene flow were detected in the south-eastern part of the range. These barriers coincided with profound changes in environmental characteristics and isolated, on a relatively small scale, porpoises from Iberian waters and on a larger scale porpoises from the Black Sea. Conclusion: The presence of these barriers to gene flow that coincide with profound changes in oceanographic features, together with the spatial variation in IBD strength, provide for the first time strong evidence that physical processes have a major impact on the demographic and genetic structure of a cetacean. This genetic pattern further suggests habitat-related fragmentation of the porpoise range that is likely to intensify with predicted surface ocean warming. Article in Journal/Newspaper Harbour porpoise North Atlantic Université de Genève: Archive ouverte UNIGE BMC Biology 5 1 |
institution |
Open Polar |
collection |
Université de Genève: Archive ouverte UNIGE |
op_collection_id |
ftunivgeneve |
language |
English |
topic |
ocean cetacean population genetics least-cost path spatial analysis |
spellingShingle |
ocean cetacean population genetics least-cost path spatial analysis Fontaine, Michaël C. Baird, Stuart JE. Piry, Sylvain Ray, Nicolas Tolley, Krystal A. Duke, Sarah Birkun, Alexei Ferreira, Marisa Jauniaux, Thierry Llavona, Ángela Öztürk, Bayram Öztürk, Ayaka A. Ridoux, Vincent Rogan, Emer Sequeira, Marina Siebert, Ursula Vikingsson, Gísli A. Bouquegneau, Jean-Marie Michaux, Johan R. Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
topic_facet |
ocean cetacean population genetics least-cost path spatial analysis |
description |
Background: Understanding the role of seascape in shaping genetic and demographic population structure is highly challenging for marine pelagic species such as cetaceans for which there is generally little evidence of what could effectively restrict their dispersal. In the present work, we applied a combination of recent individual-based landscape genetic approaches to investigate the population genetic structure of a highly mobile extensive range cetacean, the harbour porpoise in the eastern North Atlantic, with regards to oceanographic characteristics that could constrain its dispersal. Results: Analyses of 10 microsatellite loci for 752 individuals revealed that most of the sampled range in the eastern North Atlantic behaves as a 'continuous' population that widely extends over thousands of kilometres with significant isolation by distance (IBD). However, strong barriers to gene flow were detected in the south-eastern part of the range. These barriers coincided with profound changes in environmental characteristics and isolated, on a relatively small scale, porpoises from Iberian waters and on a larger scale porpoises from the Black Sea. Conclusion: The presence of these barriers to gene flow that coincide with profound changes in oceanographic features, together with the spatial variation in IBD strength, provide for the first time strong evidence that physical processes have a major impact on the demographic and genetic structure of a cetacean. This genetic pattern further suggests habitat-related fragmentation of the porpoise range that is likely to intensify with predicted surface ocean warming. |
format |
Article in Journal/Newspaper |
author |
Fontaine, Michaël C. Baird, Stuart JE. Piry, Sylvain Ray, Nicolas Tolley, Krystal A. Duke, Sarah Birkun, Alexei Ferreira, Marisa Jauniaux, Thierry Llavona, Ángela Öztürk, Bayram Öztürk, Ayaka A. Ridoux, Vincent Rogan, Emer Sequeira, Marina Siebert, Ursula Vikingsson, Gísli A. Bouquegneau, Jean-Marie Michaux, Johan R. |
author_facet |
Fontaine, Michaël C. Baird, Stuart JE. Piry, Sylvain Ray, Nicolas Tolley, Krystal A. Duke, Sarah Birkun, Alexei Ferreira, Marisa Jauniaux, Thierry Llavona, Ángela Öztürk, Bayram Öztürk, Ayaka A. Ridoux, Vincent Rogan, Emer Sequeira, Marina Siebert, Ursula Vikingsson, Gísli A. Bouquegneau, Jean-Marie Michaux, Johan R. |
author_sort |
Fontaine, Michaël C. |
title |
Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
title_short |
Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
title_full |
Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
title_fullStr |
Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
title_full_unstemmed |
Rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in Old World waters |
title_sort |
rise of oceanographic barriers in continuous populations of a cetacean: the genetic structure of harbour porpoises in old world waters |
publishDate |
2007 |
url |
https://archive-ouverte.unige.ch/unige:18207 |
genre |
Harbour porpoise North Atlantic |
genre_facet |
Harbour porpoise North Atlantic |
op_source |
ISSN: 1741-7007 BMC biology, vol. 5, no. 1 (2007) 30 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1186/1741-7007-5-30 https://archive-ouverte.unige.ch/unige:18207 unige:18207 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1186/1741-7007-5-30 |
container_title |
BMC Biology |
container_volume |
5 |
container_issue |
1 |
_version_ |
1778526350999552000 |