Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species.
Eurythenes gryllus is one of the most widespread amphipod species, occurring in every ocean with a depth range covering the bathyal, abyssal and hadal zones. Previous studies, however, indicated the existence of several genetically and morphologically divergent lineages, questioning the assumption o...
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ftdoajarticles:oai:doaj.org/article:b36f395132e8450e9de0274fb11d60ff 2023-05-15T15:13:00+02:00 Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. Charlotte Havermans Gontran Sonet Cédric d'Udekem d'Acoz Zoltán T Nagy Patrick Martin Saskia Brix Torben Riehl Shobhit Agrawal Christoph Held 2013-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0074218 https://doaj.org/article/b36f395132e8450e9de0274fb11d60ff EN eng Public Library of Science (PLoS) https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24086322/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0074218 https://doaj.org/article/b36f395132e8450e9de0274fb11d60ff PLoS ONE, Vol 8, Iss 9, p e74218 (2013) Medicine R Science Q article 2013 ftdoajarticles https://doi.org/10.1371/journal.pone.0074218 2022-12-31T05:07:09Z Eurythenes gryllus is one of the most widespread amphipod species, occurring in every ocean with a depth range covering the bathyal, abyssal and hadal zones. Previous studies, however, indicated the existence of several genetically and morphologically divergent lineages, questioning the assumption of its cosmopolitan and eurybathic distribution. For the first time, its genetic diversity was explored at the global scale (Arctic, Atlantic, Pacific and Southern oceans) by analyzing nuclear (28S rDNA) and mitochondrial (COI, 16S rDNA) sequence data using various species delimitation methods in a phylogeographic context. Nine putative species-level clades were identified within E. gryllus. A clear distinction was observed between samples collected at bathyal versus abyssal depths, with a genetic break occurring around 3,000 m. Two bathyal and two abyssal lineages showed a widespread distribution, while five other abyssal lineages each seemed to be restricted to a single ocean basin. The observed higher diversity in the abyss compared to the bathyal zone stands in contrast to the depth-differentiation hypothesis. Our results indicate that, despite the more uniform environment of the abyss and its presumed lack of obvious isolating barriers, abyssal populations might be more likely to show population differentiation and undergo speciation events than previously assumed. Potential factors influencing species' origins and distributions, such as hydrostatic pressure, are discussed. In addition, morphological findings coincided with the molecular clades. Of all specimens available for examination, those of the bipolar bathyal clade seemed the most similar to the 'true' E. gryllus. We present the first molecular evidence for a bipolar distribution in a macro-benthic deep-sea organism. Article in Journal/Newspaper Arctic Eurythenes gryllus Directory of Open Access Journals: DOAJ Articles Arctic Pacific PLoS ONE 8 9 e74218 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Charlotte Havermans Gontran Sonet Cédric d'Udekem d'Acoz Zoltán T Nagy Patrick Martin Saskia Brix Torben Riehl Shobhit Agrawal Christoph Held Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
topic_facet |
Medicine R Science Q |
description |
Eurythenes gryllus is one of the most widespread amphipod species, occurring in every ocean with a depth range covering the bathyal, abyssal and hadal zones. Previous studies, however, indicated the existence of several genetically and morphologically divergent lineages, questioning the assumption of its cosmopolitan and eurybathic distribution. For the first time, its genetic diversity was explored at the global scale (Arctic, Atlantic, Pacific and Southern oceans) by analyzing nuclear (28S rDNA) and mitochondrial (COI, 16S rDNA) sequence data using various species delimitation methods in a phylogeographic context. Nine putative species-level clades were identified within E. gryllus. A clear distinction was observed between samples collected at bathyal versus abyssal depths, with a genetic break occurring around 3,000 m. Two bathyal and two abyssal lineages showed a widespread distribution, while five other abyssal lineages each seemed to be restricted to a single ocean basin. The observed higher diversity in the abyss compared to the bathyal zone stands in contrast to the depth-differentiation hypothesis. Our results indicate that, despite the more uniform environment of the abyss and its presumed lack of obvious isolating barriers, abyssal populations might be more likely to show population differentiation and undergo speciation events than previously assumed. Potential factors influencing species' origins and distributions, such as hydrostatic pressure, are discussed. In addition, morphological findings coincided with the molecular clades. Of all specimens available for examination, those of the bipolar bathyal clade seemed the most similar to the 'true' E. gryllus. We present the first molecular evidence for a bipolar distribution in a macro-benthic deep-sea organism. |
format |
Article in Journal/Newspaper |
author |
Charlotte Havermans Gontran Sonet Cédric d'Udekem d'Acoz Zoltán T Nagy Patrick Martin Saskia Brix Torben Riehl Shobhit Agrawal Christoph Held |
author_facet |
Charlotte Havermans Gontran Sonet Cédric d'Udekem d'Acoz Zoltán T Nagy Patrick Martin Saskia Brix Torben Riehl Shobhit Agrawal Christoph Held |
author_sort |
Charlotte Havermans |
title |
Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
title_short |
Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
title_full |
Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
title_fullStr |
Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
title_full_unstemmed |
Genetic and morphological divergences in the cosmopolitan deep-sea amphipod Eurythenes gryllus reveal a diverse abyss and a bipolar species. |
title_sort |
genetic and morphological divergences in the cosmopolitan deep-sea amphipod eurythenes gryllus reveal a diverse abyss and a bipolar species. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2013 |
url |
https://doi.org/10.1371/journal.pone.0074218 https://doaj.org/article/b36f395132e8450e9de0274fb11d60ff |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Eurythenes gryllus |
genre_facet |
Arctic Eurythenes gryllus |
op_source |
PLoS ONE, Vol 8, Iss 9, p e74218 (2013) |
op_relation |
https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24086322/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0074218 https://doaj.org/article/b36f395132e8450e9de0274fb11d60ff |
op_doi |
https://doi.org/10.1371/journal.pone.0074218 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
9 |
container_start_page |
e74218 |
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