Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and
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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ftciteseerx:oai:CiteSeerX.psu:10.1.1.405.5538 2023-05-15T13:37:58+02:00 Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and Raphaël Morard Frédéric Quillévéré Christophe J. Douady Colomban De Vargas Thibault De Gilles Escarguel The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.405.5538 http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.405.5538 http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf text ftciteseerx 2016-01-08T03:02:00Z 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,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 pseudocryptic species back into the fossil record, which in turn may contribute to monitor past movements of the Antarctic Text Antarc* Antarctic Unknown Antarctic The Antarctic |
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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,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 pseudocryptic species back into the fossil record, which in turn may contribute to monitor past movements of the Antarctic |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Raphaël Morard Frédéric Quillévéré Christophe J. Douady Colomban De Vargas Thibault De Gilles Escarguel |
spellingShingle |
Raphaël Morard Frédéric Quillévéré Christophe J. Douady Colomban De Vargas Thibault De Gilles Escarguel Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
author_facet |
Raphaël Morard Frédéric Quillévéré Christophe J. Douady Colomban De Vargas Thibault De Gilles Escarguel |
author_sort |
Raphaël Morard |
title |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
title_short |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
title_full |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
title_fullStr |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
title_full_unstemmed |
Worldwide Genotyping in the Planktonic Foraminifer Globoconella inflata: Implications for Life History and |
title_sort |
worldwide genotyping in the planktonic foraminifer globoconella inflata: implications for life history and |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.405.5538 http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.405.5538 http://hal-ens-lyon.archives-ouvertes.fr/docs/00/65/70/29/PDF/journal.pone.0026665.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766100151912366080 |