Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography
The planktonic foraminiferal morpho-species Globoconella inflata is widely used as a stratigraphic and paleoceanographic index. While G. inflata was until now regarded as a single species, we show that it rather constitutes a complex of two pseudo-cryptic species. Our study is based on SSU and ITS r...
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ftarchimer:oai:archimer.ifremer.fr:25559 2023-05-15T13:47:21+02:00 Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography Morard, Raphael Quillevere, Frederic Douady, Christophe J. De Vargas, Colomban De Garidel-thoron, Thibault Escarguel, Gilles 2011-10 application/pdf https://archimer.ifremer.fr/doc/00144/25559/23704.pdf https://doi.org/10.1371/journal.pone.0026665 https://archimer.ifremer.fr/doc/00144/25559/ eng eng Public Library Science https://archimer.ifremer.fr/doc/00144/25559/23704.pdf doi:10.1371/journal.pone.0026665 https://archimer.ifremer.fr/doc/00144/25559/ 2011 Morard et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. info:eu-repo/semantics/openAccess restricted use CC-BY Plos One (1932-6203) (Public Library Science), 2011-10 , Vol. 6 , N. 10 , P. - text Publication info:eu-repo/semantics/article 2011 ftarchimer https://doi.org/10.1371/journal.pone.0026665 2021-09-23T20:23:16Z The planktonic foraminiferal morpho-species Globoconella inflata is widely used as a stratigraphic and paleoceanographic index. While G. inflata was until now regarded as a single species, we show that it rather constitutes a complex of two pseudo-cryptic species. Our study is based on SSU and ITS rDNA sequence analyses and genotyping of 497 individuals collected at 49 oceanic stations covering the worldwide range of the morpho-species. Phylogenetic analyses unveil the presence of two divergent genotypes. Type I inhabits transitional and subtropical waters of both hemispheres, while Type II is restricted to the Antarctic subpolar waters. The two genetic species exhibit a strictly allopatric distribution on each side of the Antarctic Subpolar Front. On the other hand, sediment data show that G. inflata was restricted to transitional and subtropical environments since the early Pliocene, and expanded its geographic range to southern subpolar waters similar to 700 kyrs ago, during marine isotopic stage 17. This datum may correspond to a peripatric speciation event that led to the partition of an ancestral genotype into two distinct evolutionary units. Biometric measurements performed on individual G. inflata from plankton tows north and south of the Antarctic Subpolar Front indicate that Types I and II display slight but significant differences in shell morphology. These morphological differences may allow recognition of the G. inflata pseudo-cryptic species back into the fossil record, which in turn may contribute to monitor past movements of the Antarctic Subpolar Front during the middle and late Pleistocene. Article in Journal/Newspaper Antarc* Antarctic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic The Antarctic PLoS ONE 6 10 e26665 |
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Open Polar |
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Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The planktonic foraminiferal morpho-species Globoconella inflata is widely used as a stratigraphic and paleoceanographic index. While G. inflata was until now regarded as a single species, we show that it rather constitutes a complex of two pseudo-cryptic species. Our study is based on SSU and ITS rDNA sequence analyses and genotyping of 497 individuals collected at 49 oceanic stations covering the worldwide range of the morpho-species. Phylogenetic analyses unveil the presence of two divergent genotypes. Type I inhabits transitional and subtropical waters of both hemispheres, while Type II is restricted to the Antarctic subpolar waters. The two genetic species exhibit a strictly allopatric distribution on each side of the Antarctic Subpolar Front. On the other hand, sediment data show that G. inflata was restricted to transitional and subtropical environments since the early Pliocene, and expanded its geographic range to southern subpolar waters similar to 700 kyrs ago, during marine isotopic stage 17. This datum may correspond to a peripatric speciation event that led to the partition of an ancestral genotype into two distinct evolutionary units. Biometric measurements performed on individual G. inflata from plankton tows north and south of the Antarctic Subpolar Front indicate that Types I and II display slight but significant differences in shell morphology. These morphological differences may allow recognition of the G. inflata pseudo-cryptic species back into the fossil record, which in turn may contribute to monitor past movements of the Antarctic Subpolar Front during the middle and late Pleistocene. |
format |
Article in Journal/Newspaper |
author |
Morard, Raphael Quillevere, Frederic Douady, Christophe J. De Vargas, Colomban De Garidel-thoron, Thibault Escarguel, Gilles |
spellingShingle |
Morard, Raphael Quillevere, Frederic Douady, Christophe J. De Vargas, Colomban De Garidel-thoron, Thibault Escarguel, Gilles Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
author_facet |
Morard, Raphael Quillevere, Frederic Douady, Christophe J. De Vargas, Colomban De Garidel-thoron, Thibault Escarguel, Gilles |
author_sort |
Morard, Raphael |
title |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
title_short |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
title_full |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
title_fullStr |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
title_full_unstemmed |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Paleoceanography |
title_sort |
worldwide genotyping in the planktonic foraminifer globoconella inflata: implications for life history and paleoceanography |
publisher |
Public Library Science |
publishDate |
2011 |
url |
https://archimer.ifremer.fr/doc/00144/25559/23704.pdf https://doi.org/10.1371/journal.pone.0026665 https://archimer.ifremer.fr/doc/00144/25559/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Plos One (1932-6203) (Public Library Science), 2011-10 , Vol. 6 , N. 10 , P. - |
op_relation |
https://archimer.ifremer.fr/doc/00144/25559/23704.pdf doi:10.1371/journal.pone.0026665 https://archimer.ifremer.fr/doc/00144/25559/ |
op_rights |
2011 Morard et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0026665 |
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PLoS ONE |
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6 |
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10 |
container_start_page |
e26665 |
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1766246968205508608 |