Comprehensive sampling reveals circumpolarity and sympatry in seven mitochondrial lineages of the Southern Ocean crinoid species Promachocrinus kerguelensis (Echinodermata)
Identifieur interne : 000631 ( Istex/Checkpoint ); précédent : 000630; suivant : 000632Comprehensive sampling reveals circumpolarity and sympatry in seven mitochondrial lineages of the Southern Ocean crinoid species Promachocrinus kerguelensis (Echinodermata)
Auteurs : L. G. Hemery [France] ; M. Eléaume [France] ; V. Roussel [France] ; N. Améziane [France] ; C. Gallut [France] ; D. Steinke [Canada] ; C. Cruaud [France] ; A. Couloux [France] ; N. G. Wilson [Australie]Source :
- Molecular Ecology [ 0962-1083 ] ; 2012-05.
Descripteurs français
- Wicri :
- topic : Antarctique, écologie.
English descriptors
- KwdEn :
- Amundsen, Antarctic, Antarctic peninsula, Antarctica, Atlantic sector, Average number, Benthic, Blackwell publishing, Bouvet, Bouvet island, Circumpolar, Clade, Clarke crame, Comprehensive sampling, Connectivity, Crinoid, Crinoidea, Cryptic, Cryptic speciation, Cryptic species, Cycling conditions, Cytb, Cytochrome, Demographic history, Different phylogroups, Diversity indices, East weddell, Echinodermata, Ecology, Eleaume, Ews1, Ews1 ews2, Ews2, Genetic diversity, Glacial, Glacial refugia, Halanych, Haplotype, Haplotype diversity, Haplotype network, Haplotype networks, High number, High proportion, Hunter halanych, Invertebrate, Kapp norvegia, Kerguelen, Kerguelen plateau, Kerguelensis, Lineage, Linse, Marine biology, Marine invertebrates, Mitochondrial, Mitochondrial phylogroups, Molecular ecology, Multiple refugia, Nuclear phylogroups, Orkney islands, Other populations, Oxidase, Oxidase subunit, Pairwise, Philosophical transactions, Phylogroup, Phylogroups, Polar biology, Polarstern, Polymorphic, Polymorphic sites, Primer, Private haplotypes, Promachocrinus, Promachocrinus kerguelensis, Promachocrinus phylogroups, Raupach, Refugium, Research part studies, Royal society, Sampling effort, Sandwich islands, Scotia, Secondary contact, Shetland, Shetland islands, Southern ocean, Speciation, Subunit, Thatje, Wagele, Weddell, West antarctic peninsula.
- Teeft :
- Amundsen, Antarctic, Antarctic peninsula, Antarctica, Atlantic sector, Average number, Benthic, Blackwell publishing, Bouvet, Bouvet island, Circumpolar, Clade, Clarke crame, Comprehensive sampling, Connectivity, Crinoid, Crinoidea, Cryptic, Cryptic speciation, Cryptic species, Cycling conditions, Cytb, Cytochrome, Demographic history, Different phylogroups, Diversity indices, East weddell, Echinodermata, Ecology, Eleaume, Ews1, Ews1 ews2, Ews2, Genetic diversity, Glacial, Glacial refugia, Halanych, Haplotype, Haplotype diversity, Haplotype network, Haplotype networks, High number, High proportion, Hunter halanych, Invertebrate, Kapp norvegia, Kerguelen, Kerguelen plateau, Kerguelensis, Lineage, Linse, Marine biology, Marine invertebrates, Mitochondrial, Mitochondrial phylogroups, Molecular ecology, Multiple refugia, Nuclear phylogroups, Orkney islands, Other populations, Oxidase, Oxidase subunit, Pairwise, Philosophical transactions, Phylogroup, Phylogroups, Polar biology, Polarstern, Polymorphic, Polymorphic sites, Primer, Private haplotypes, Promachocrinus, Promachocrinus kerguelensis, Promachocrinus phylogroups, Raupach, Refugium, Research part studies, Royal society, Sampling effort, Sandwich islands, Scotia, Secondary contact, Shetland, Shetland islands, Southern ocean, Speciation, Subunit, Thatje, Wagele, Weddell, West antarctic peninsula.
Abstract
Sampling at appropriate spatial scales in the Southern Ocean is logistically challenging and may influence estimates of diversity by missing intermediate representatives. With the assistance of sampling efforts especially influenced by the International Polar Year 2007–2008, we gathered nearly 1500 specimens of the crinoid species Promachocrinus kerguelensis from around Antarctica. We used phylogeographic and phylogenetic tools to assess its genetic diversity, demographic history and evolutionary relationships. Six phylogroups (A–F) identified in an earlier study are corroborated here, with the addition of one new phylogroup (E2). All phylogroups are circumpolar, sympatric and eurybathic. The phylogeny of Promachocrinus phylogroups reveals two principal clades that may represent two different cryptic species with contrasting demographic histories. Genetic diversity indices vary dramatically within phylogroups, and within populations, suggesting multiple glacial refugia in the Southern Ocean: on the Kerguelen Plateau, in the East Weddell Sea and the South Shetland Islands (Atlantic sector), and on the East Antarctic continental shelf in the Dumont d’Urville Sea and Ross Sea. The inferences of gene flow vary among the phylogroups, showing discordant spatial patterns. Phylogroup A is the only one found in the Sub‐Antarctic region, although without evident connectivity between Bouvet and Kerguelen populations. The Scotia Arc region shows high levels of connectivity between populations in most of the phylogroups, and barriers to gene flow are evident in East Antarctica.
Url:
DOI: 10.1111/j.1365-294X.2012.05512.x
Affiliations:
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ISTEX:38367215B1A1CB21046CA65E5B774DEE844B3584Le document en format XML
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Steinke</name><affiliation wicri:level="1"><country>Canada</country><wicri:regionArea>Biodiversity Institute of Ontario, University of Guelph, 50 Stone Road East, Guelph, Ontario</wicri:regionArea><wicri:noRegion>Ontario</wicri:noRegion></affiliation></author><author><name sortKey="Cruaud, C" sort="Cruaud, C" uniqKey="Cruaud C" first="C." last="Cruaud">C. Cruaud</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Genoscope, Centre National de Séquençage, 2 rue Gaston Crémieux, CP5706, 91057 Évry Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Évry</settlement></placeName></affiliation></author><author><name sortKey="Couloux, A" sort="Couloux, A" uniqKey="Couloux A" first="A." last="Couloux">A. Couloux</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Genoscope, Centre National de Séquençage, 2 rue Gaston Crémieux, CP5706, 91057 Évry Cedex</wicri:regionArea><wicri:noRegion>91057 Évry Cedex</wicri:noRegion><wicri:noRegion>91057 Évry Cedex</wicri:noRegion></affiliation></author><author><name sortKey="Wilson, N G" sort="Wilson, N G" uniqKey="Wilson N" first="N. G." last="Wilson">N. G. Wilson</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>The Australian Museum, 6 College Street, Sydney, NSW 2010</wicri:regionArea><wicri:noRegion>NSW 2010</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Molecular Ecology</title><title level="j" type="alt">MOLECULAR ECOLOGY</title><idno type="ISSN">0962-1083</idno><idno type="eISSN">1365-294X</idno><imprint><biblScope unit="vol">21</biblScope><biblScope unit="issue">10</biblScope><biblScope unit="page" from="2502">2502</biblScope><biblScope unit="page" to="2518">2518</biblScope><biblScope unit="page-count">17</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2012-05">2012-05</date></imprint><idno type="ISSN">0962-1083</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0962-1083</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amundsen</term><term>Antarctic</term><term>Antarctic peninsula</term><term>Antarctica</term><term>Atlantic sector</term><term>Average number</term><term>Benthic</term><term>Blackwell publishing</term><term>Bouvet</term><term>Bouvet island</term><term>Circumpolar</term><term>Clade</term><term>Clarke crame</term><term>Comprehensive sampling</term><term>Connectivity</term><term>Crinoid</term><term>Crinoidea</term><term>Cryptic</term><term>Cryptic speciation</term><term>Cryptic species</term><term>Cycling conditions</term><term>Cytb</term><term>Cytochrome</term><term>Demographic history</term><term>Different phylogroups</term><term>Diversity indices</term><term>East weddell</term><term>Echinodermata</term><term>Ecology</term><term>Eleaume</term><term>Ews1</term><term>Ews1 ews2</term><term>Ews2</term><term>Genetic diversity</term><term>Glacial</term><term>Glacial refugia</term><term>Halanych</term><term>Haplotype</term><term>Haplotype diversity</term><term>Haplotype network</term><term>Haplotype networks</term><term>High number</term><term>High proportion</term><term>Hunter halanych</term><term>Invertebrate</term><term>Kapp norvegia</term><term>Kerguelen</term><term>Kerguelen plateau</term><term>Kerguelensis</term><term>Lineage</term><term>Linse</term><term>Marine biology</term><term>Marine invertebrates</term><term>Mitochondrial</term><term>Mitochondrial phylogroups</term><term>Molecular ecology</term><term>Multiple refugia</term><term>Nuclear phylogroups</term><term>Orkney islands</term><term>Other populations</term><term>Oxidase</term><term>Oxidase subunit</term><term>Pairwise</term><term>Philosophical transactions</term><term>Phylogroup</term><term>Phylogroups</term><term>Polar biology</term><term>Polarstern</term><term>Polymorphic</term><term>Polymorphic sites</term><term>Primer</term><term>Private haplotypes</term><term>Promachocrinus</term><term>Promachocrinus kerguelensis</term><term>Promachocrinus phylogroups</term><term>Raupach</term><term>Refugium</term><term>Research part studies</term><term>Royal society</term><term>Sampling effort</term><term>Sandwich islands</term><term>Scotia</term><term>Secondary contact</term><term>Shetland</term><term>Shetland islands</term><term>Southern ocean</term><term>Speciation</term><term>Subunit</term><term>Thatje</term><term>Wagele</term><term>Weddell</term><term>West antarctic peninsula</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Amundsen</term><term>Antarctic</term><term>Antarctic peninsula</term><term>Antarctica</term><term>Atlantic sector</term><term>Average number</term><term>Benthic</term><term>Blackwell publishing</term><term>Bouvet</term><term>Bouvet island</term><term>Circumpolar</term><term>Clade</term><term>Clarke crame</term><term>Comprehensive sampling</term><term>Connectivity</term><term>Crinoid</term><term>Crinoidea</term><term>Cryptic</term><term>Cryptic speciation</term><term>Cryptic species</term><term>Cycling conditions</term><term>Cytb</term><term>Cytochrome</term><term>Demographic history</term><term>Different phylogroups</term><term>Diversity indices</term><term>East weddell</term><term>Echinodermata</term><term>Ecology</term><term>Eleaume</term><term>Ews1</term><term>Ews1 ews2</term><term>Ews2</term><term>Genetic diversity</term><term>Glacial</term><term>Glacial refugia</term><term>Halanych</term><term>Haplotype</term><term>Haplotype diversity</term><term>Haplotype network</term><term>Haplotype networks</term><term>High number</term><term>High proportion</term><term>Hunter halanych</term><term>Invertebrate</term><term>Kapp norvegia</term><term>Kerguelen</term><term>Kerguelen plateau</term><term>Kerguelensis</term><term>Lineage</term><term>Linse</term><term>Marine biology</term><term>Marine invertebrates</term><term>Mitochondrial</term><term>Mitochondrial phylogroups</term><term>Molecular ecology</term><term>Multiple refugia</term><term>Nuclear phylogroups</term><term>Orkney islands</term><term>Other populations</term><term>Oxidase</term><term>Oxidase subunit</term><term>Pairwise</term><term>Philosophical transactions</term><term>Phylogroup</term><term>Phylogroups</term><term>Polar biology</term><term>Polarstern</term><term>Polymorphic</term><term>Polymorphic sites</term><term>Primer</term><term>Private haplotypes</term><term>Promachocrinus</term><term>Promachocrinus kerguelensis</term><term>Promachocrinus phylogroups</term><term>Raupach</term><term>Refugium</term><term>Research part studies</term><term>Royal society</term><term>Sampling effort</term><term>Sandwich islands</term><term>Scotia</term><term>Secondary contact</term><term>Shetland</term><term>Shetland islands</term><term>Southern ocean</term><term>Speciation</term><term>Subunit</term><term>Thatje</term><term>Wagele</term><term>Weddell</term><term>West antarctic peninsula</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Antarctique</term><term>écologie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sampling at appropriate spatial scales in the Southern Ocean is logistically challenging and may influence estimates of diversity by missing intermediate representatives. With the assistance of sampling efforts especially influenced by the International Polar Year 2007–2008, we gathered nearly 1500 specimens of the crinoid species Promachocrinus kerguelensis from around Antarctica. We used phylogeographic and phylogenetic tools to assess its genetic diversity, demographic history and evolutionary relationships. Six phylogroups (A–F) identified in an earlier study are corroborated here, with the addition of one new phylogroup (E2). All phylogroups are circumpolar, sympatric and eurybathic. The phylogeny of Promachocrinus phylogroups reveals two principal clades that may represent two different cryptic species with contrasting demographic histories. Genetic diversity indices vary dramatically within phylogroups, and within populations, suggesting multiple glacial refugia in the Southern Ocean: on the Kerguelen Plateau, in the East Weddell Sea and the South Shetland Islands (Atlantic sector), and on the East Antarctic continental shelf in the Dumont d’Urville Sea and Ross Sea. The inferences of gene flow vary among the phylogroups, showing discordant spatial patterns. Phylogroup A is the only one found in the Sub‐Antarctic region, although without evident connectivity between Bouvet and Kerguelen populations. The Scotia Arc region shows high levels of connectivity between populations in most of the phylogroups, and barriers to gene flow are evident in East Antarctica.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Canada</li><li>France</li></country><region><li>Région Bretagne</li><li>Île-de-France</li></region><settlement><li>Concarneau</li><li>Paris</li><li>Évry</li></settlement></list><tree><country name="France"><region name="Île-de-France"><name sortKey="Hemery, L G" sort="Hemery, L G" uniqKey="Hemery L" first="L. G." last="Hemery">L. G. Hemery</name></region><name sortKey="Ameziane, N" sort="Ameziane, N" uniqKey="Ameziane N" first="N." last="Améziane">N. Améziane</name><name sortKey="Couloux, A" sort="Couloux, A" uniqKey="Couloux A" first="A." last="Couloux">A. Couloux</name><name sortKey="Cruaud, C" sort="Cruaud, C" uniqKey="Cruaud C" first="C." last="Cruaud">C. Cruaud</name><name sortKey="Eleaume, M" sort="Eleaume, M" uniqKey="Eleaume M" first="M." last="Eléaume">M. Eléaume</name><name sortKey="Gallut, C" sort="Gallut, C" uniqKey="Gallut C" first="C." last="Gallut">C. Gallut</name><name sortKey="Roussel, V" sort="Roussel, V" uniqKey="Roussel V" first="V." last="Roussel">V. Roussel</name></country><country name="Canada"><noRegion><name sortKey="Steinke, D" sort="Steinke, D" uniqKey="Steinke D" first="D." last="Steinke">D. Steinke</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Wilson, N G" sort="Wilson, N G" uniqKey="Wilson N" first="N. G." last="Wilson">N. G. Wilson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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